It has been established that H+ secretion can be maintained in frog stomach in the absence of exogenous CO2 by using a nutrient bathing fluid containing 25 mM H2PO4 (pH approximately equal to 4.5) or by lowering the pH of a nonbuffered nutrient solution to about 3.0-3.6. Exogenous CO2 in the presence of these nutrient solutions uniformly caused a marked decrease in H+ secretion, PD, adn short-circuit current (Isc) and an increase in transmucosal resistance (R). Elevation of nutrient [k+] to 83 mM reduced R significantly but transiently without change in H+ when nutrient pH less than 5.0, whereas R returned to base line and H+ increased when nutrient pH greater than 5.0. Acidification of the nutrient medium in the presence of exogenous CO2 results in inhibition of the secretory pump, probably by decreasing intracellular pH, and also interferes with conductance at the nutrient membrane. Removal of exogenous CO2 from standard bicarbonate nutrient solution reduced by 50% the H+, PD, and Isc without change in R; K+-free nutrient solutions reverse these changes in Isc and PD but not in H+. The dropping PD and rising R induced by K+-free nutrient solutions in 5% CO2 - 95% O2 are returned toward normal by 100% O2. Our findings support an important role for exogenous CO2 in maintaining normal acid-base balance in frog mucosa by acting as an acidifying agent.
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Reports, articles, papers, scientific and non - scientific works of any form, including tables, maps, or any other kind of output, in printed or electronic form, based in whole or in part on the data supplied, must contain an acknowledgement of the form: \"Data reused from the BonaRes Data Centre www.bonares.de. This data were created as part of the ZALF Datenerfassung's research activities.\" Although every care has been taken in preparing and testing the data, the ZALF Datenerfassung and the BonaRes Data Centre cannot guarantee that the data are correct; neither does the ZALF Datenerfassung and the BonaRes Data Centre accept any liability whatsoever for any error, missing data or omission in the data, or for any loss or damage arising from its use. 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Maximal levels of free water clearance/clomerular filtration rate (CH2O/GFR) averaged 8.4% with nitrate loading and 14.4% with saline loading. Since ethacrynic acid and chlorothiazide exert their major natriuretic effect in the distal nephron, the increment in Na ad Cl reabsorbed beyond the proximal tubule. The administration of these agents resulted in an increase in fractional sodium excretion (CNa/GFR) of 21.1%, urinary sodium excretion (UNaV) of 1,126 mueq/min, and urinary chloride excretion (UClV) of 848 mueq/min during nitrate loading compared with an increase in CNa/GFR of 37.6%, UNaV of 2,362 mueq/min, and UClV of 2,397 mueq/min during saline loading. The smaller diuretic-induced increment in Na and Cl excretion in the nitrate studies suggests, as do the hydrated studies, that less Cl and Na are reabsorbed in the distal nephron during nitrate than saline loading. At every level of UNaV, fractional bicarbonate reabsorption was higher, urine pH was lower, and urinary potassium excretion (UKV) was higher in the nitrate studies. Thus, compared with saline loading, sodium nitrate decreases chloride and sodium reabsorption in the distal nephron. The higher hydrogen and potassium secretion in the nitrate studies may be consequent to the decreased ability of the distal nephron to reabsorb chloride.
", "keywords": ["0301 basic medicine", "0303 health sciences", "Nitrates", "Sodium", "Biological Transport", "Chlorothiazide", "Hydrogen-Ion Concentration", "Sodium Chloride", "Urine", "6. Clean water", "Diuresis", "3. Good health", "Bicarbonates", "Electrolytes", "03 medical and health sciences", "Dogs", "Ethacrynic Acid", "Kidney Tubules", "Chlorides", "Potassium", "Animals", "Glomerular Filtration Rate"], "contacts": [{"organization": "Marvin F. Levitt, T Kahn, J. P. Bosch, MH Goldstein,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/bloszies,2016"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/American%20Journal%20of%20Physiology-Legacy%20Content", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "bloszies,2016", "name": "item", "description": "bloszies,2016", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/bloszies,2016"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "1975-09-01T00:00:00Z"}}, {"id": "bravomartinez,2015", "type": "Feature", "geometry": null, "properties": {"updated": "2026-06-26T16:34:56Z", "type": "Journal Article", "created": "2017-12-22", "description": "It has been established that H+ secretion can be maintained in frog stomach in the absence of exogenous CO2 by using a nutrient bathing fluid containing 25 mM H2PO4 (pH approximately equal to 4.5) or by lowering the pH of a nonbuffered nutrient solution to about 3.0-3.6. Exogenous CO2 in the presence of these nutrient solutions uniformly caused a marked decrease in H+ secretion, PD, adn short-circuit current (Isc) and an increase in transmucosal resistance (R). Elevation of nutrient [k+] to 83 mM reduced R significantly but transiently without change in H+ when nutrient pH less than 5.0, whereas R returned to base line and H+ increased when nutrient pH greater than 5.0. Acidification of the nutrient medium in the presence of exogenous CO2 results in inhibition of the secretory pump, probably by decreasing intracellular pH, and also interferes with conductance at the nutrient membrane. Removal of exogenous CO2 from standard bicarbonate nutrient solution reduced by 50% the H+, PD, and Isc without change in R; K+-free nutrient solutions reverse these changes in Isc and PD but not in H+. The dropping PD and rising R induced by K+-free nutrient solutions in 5% CO2 - 95% O2 are returned toward normal by 100% O2. Our findings support an important role for exogenous CO2 in maintaining normal acid-base balance in frog mucosa by acting as an acidifying agent.
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This data were created as part of BonaRes Module A-Project - CATCHY's research activities. Although every care has been taken in preparing and testing the data, BonaRes Module A - Project - CATCHY and BonaRes Data Centre cannot guarantee that the data are correct; neither does BonaRes Module A - Project and BonaRes Data Centre accept any liability whatsoever for any error, missing data or omission in the data, or for any loss or damage arising from its use. The BonaRes Module A-Project-CATCHY and BonaRes Data Centre will not be responsible for any direct or indirect use which might be made of the data. The access to this data is restricted during embargo time. 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ZALF;University of Rostock;Eberswalde University for Sustainable Development - HNEE;Landwirtschaftliche Beratung der Agrarverb\u00e4nde Brandenburg GmbH;Leibniz-Institute for Agricultural Engineering and Bioeconomy - ATB;Leibniz Institute of Vegetable and Ornamental Crops - IGZ;Komturei Lietzen GmbH", "roles": ["contributor"]}], "themes": [{"concepts": [{"id": "infoMapAccessService"}], "scheme": "GEMET - INSPIRE themes, version 1.0"}, {"concepts": [{"id": "ph sensors"}, {"id": "optical sensors"}, {"id": "soil pH"}, {"id": "soil organic carbon"}, {"id": "soil organic matter"}, {"id": "nitrogen"}, {"id": "potassium"}, {"id": "magnesium"}, {"id": "phosphorus"}, {"id": "soil chemicophysical properties"}, {"id": "soil fertility"}, {"id": "soil texture"}, {"id": "soil maps"}, {"id": "fertilization"}, {"id": "limes"}, {"id": "soil management"}, {"id": "soil properties"}], "scheme": "AGROVOC Multilingual agricultural thesaurus"}, {"concepts": [{"id": "ph sensors"}, {"id": "optical sensors"}, {"id": "soil pH"}, {"id": "soil organic carbon"}, {"id": "soil organic matter"}, {"id": "nitrogen"}, {"id": "potassium"}, {"id": "magnesium"}, {"id": "phosphorus"}, {"id": "soil chemicophysical properties"}, {"id": "soil fertility"}, {"id": "soil texture"}, {"id": "soil maps"}, {"id": "fertilization"}, {"id": "limes"}, {"id": "soil management"}, {"id": "soil properties"}], "scheme": "AGROVOC Multilingual agricultural thesaurus"}]}, "links": [{"href": "https://maps.bonares.de/wss/service/ags-relay/ags/guest/arcgis/rest/services/Extern/ID_4604_Brandenburg_soil_samples/MapServer/WMSServer?request=GetCapabilities&service=WMS"}, {"href": "https://metadata.bonares.de:443/smartEditor/preview/ph_BB_logo.jpg", "name": "preview", "description": "Web image thumbnail (URL)", "protocol": "WWW:LINK-1.0-http--image-thumbnail", "rel": "preview"}, {"rel": "self", "type": "application/geo+json", "title": "f1204e9d-93ae-4da5-a031-95eea531d86b", "name": "item", "description": "f1204e9d-93ae-4da5-a031-95eea531d86b", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/f1204e9d-93ae-4da5-a031-95eea531d86b"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2023-10-09T00:00:00Z"}}, {"id": "d36ad69a-42ed-42b8-be24-5492802fa876", "type": "Feature", "geometry": {"type": "Polygon", "coordinates": [[[11.88, 51.39], [11.88, 51.39], [11.88, 51.39], [11.88, 51.39], [11.88, 51.39]]]}, "properties": {"themes": [{"concepts": [{"id": "farming"}], "scheme": "https://standards.iso.org/iso/19139/resources/gmxCodelists.xml#MD_TopicCategoryCode"}, {"concepts": [{"id": "Soil"}, {"id": "sugar beet"}, {"id": "crop yield"}, {"id": "irrigation"}, {"id": "nitrogen"}, {"id": "phosphorus"}, {"id": "potassium"}, {"id": "magnesium"}, {"id": "sodium"}, {"id": "biomass"}, {"id": "nitrogen fertilizers"}], "scheme": "AGROVOC Multilingual agricultural thesaurus"}, {"concepts": [{"id": "opendata"}, {"id": "plant ingredients"}, {"id": "soil parameters"}], "scheme": "Individual"}, {"concepts": [{"id": "Boden"}], "scheme": "GEMET - INSPIRE themes, version 1.0"}], "rights": "Restrictions applied to assure the protection of privacy or intellectual property, and any special restrictions or limitations or warnings on using the resource or metadata. Reports, articles, papers, scientific and non - scientific works of any form, including tables, maps, or any other kind of output, in printed or electronic form, based in whole or in part on the data supplied, must contain an acknowledgement of the form: \"Data reused from the BonaRes Data Centre www.bonares.de. This data were created as part of the ZALF Datenerfassung's research activities.\" Although every care has been taken in preparing and testing the data, the ZALF Datenerfassung and the BonaRes Data Centre cannot guarantee that the data are correct; neither does the ZALF Datenerfassung and the BonaRes Data Centre accept any liability whatsoever for any error, missing data or omission in the data, or for any loss or damage arising from its use. The ZALF Datenerfassung and BonaRes Data Centre will not be responsible for any direct or indirect use which might be made of the data.", "updated": "2023-04-18", "type": "Dataset", "created": "2022-12-20", "language": "eng", "title": "Sugar beet time series experiment (V465) for collecting holistic data for modeling (1972, Bad Lauchst\u00e4dt, Germany)", "description": "To create a holistic data set for the verification of sugar beet yield models, a time series field experiment was set up in 1972 in Bad Lauchst\u00e4dt (Germany), a location in the Hallensian B\u00f6rde Plateau with loess soils up to 1,5 m depth, which is predestined for sugar beet cultivation. The soil is divided into horizons as follows: Arable topsoil (up to 25 cm depth), humic lime-free horizon (up to 40 cm depth), calcareous mixed horizon (up to 60 cm depth) and calcareous loess (up to 125 cm depth). In a block design experiment with four replicates, the test factors irrigation with two levels and fertilization with three levels were studied. Intensive holistic data collection on the most important plant and soil parameters was carried out at weekly intervals until final harvest at the end of September. In the case of sugar beet plant, the fresh and dry biomasses of the leaf and the body and some plant contents such as nitrogen, phosphorus, potassium, magnesium, calcium and sodium contents as well as sugar and ash contents were measured or determined. In addition some ontogenesis and stand density parameters were observed. Soil parameters such as nitrogen, soil water, pH as well as phosphorus, potassium, magnesium and sodium contents were measured for two 25 cm soil layers up to a soil depth of 0.5 m. The meteorological variables temperature and precipitation were registered to a daily accuracy and aggregated to monthly values. All agro-technical measures are presented in detail. \nThis table contains biomass and plant ingredients.\n\nRelated datasets are listed in the metadata element 'Related Identifier'.", "formats": [{"name": "CSV"}], "keywords": ["Soil", "sugar beet", "crop yield", "irrigation", "nitrogen", "phosphorus", "potassium", "magnesium", "sodium", "biomass", "nitrogen fertilizers", "opendata", "plant ingredients", "soil parameters", "Boden"], "contacts": [{"name": null, "organization": "Leibniz Centre for Agricultural Landscape Research (ZALF)", "position": "Research Platform 'Data Analysis & Simulation' - Workgroup Research Data Management", "roles": ["publisher"], "phones": [{"value": "+49 33432 82 300"}], "emails": [{"value": "dataservice@zalf.de"}], "addresses": [{"deliveryPoint": ["Eberswalder Strasse 84"], "city": "M\u00fcncheberg", "administrativeArea": "Brandenburg", "postalCode": "15374", "country": "Germany"}], "links": [{"href": null}]}, {"name": "Wilfried Mirschel", "organization": "Leibniz Centre for Agricultural Landscape Research (ZALF e.V.)", "position": null, "roles": ["author"], "phones": [{"value": null}], "emails": [{"value": "wmirschel@gmx.de"}], "addresses": [{"deliveryPoint": [null], "city": null, "administrativeArea": null, "postalCode": null, "country": null}], "links": [{"href": {"url": null, "protocol": null, "protocol_url": "", "name": "0000-0002-3620-3171", "name_url": "", "description": "ORCID", "description_url": "", "applicationprofile": null, "applicationprofile_url": "", "function": null}}]}, {"name": "Andreas Lemke", "organization": "University of Potsdam", "position": null, "roles": ["author"], "phones": [{"value": null}], "emails": [{"value": "dataservice@zalf.de"}], "addresses": [{"deliveryPoint": [null], "city": null, "administrativeArea": null, "postalCode": null, "country": null}], "links": [{"href": null}]}, {"name": "Kristin Meier", "organization": "Leibniz Centre for Agricultural Landscape Research (ZALF e.V.)", "position": null, "roles": ["author"], "phones": [{"value": null}], "emails": [{"value": "kristin.meier@zalf.de"}], "addresses": [{"deliveryPoint": [null], "city": null, "administrativeArea": null, "postalCode": null, "country": null}], "links": [{"href": null}]}, {"name": "G\u00fcnter K\u00fchn", "organization": "Research Centre for Soil Fertility (FZB) M\u00fcncheberg, Bad Lauchst\u00e4dt field office", "position": null, "roles": ["projectLeader"], "phones": [{"value": null}], "emails": [{"value": "dataservice@zalf.de"}], "addresses": [{"deliveryPoint": [null], "city": null, "administrativeArea": null, "postalCode": null, "country": null}], "links": [{"href": null}]}, {"name": "Helmut Weschke", "organization": "Research Centre for Soil Fertility (FZB) M\u00fcncheberg, Bad Lauchst\u00e4dt field office", "position": null, "roles": ["dataCollector"], "phones": [{"value": null}], "emails": [{"value": "dataservice@zalf.de"}], "addresses": [{"deliveryPoint": [null], "city": null, "administrativeArea": null, "postalCode": null, "country": null}], "links": [{"href": null}]}, {"name": "Fritz Hoffmann", "organization": "Research Centre for Soil Fertility (FZB) M\u00fcncheberg", "position": null, "roles": ["projectMember"], "phones": [{"value": null}], "emails": [{"value": "dataservice@zalf.de"}], "addresses": [{"deliveryPoint": [null], "city": null, "administrativeArea": null, "postalCode": null, "country": null}], "links": [{"href": null}]}, {"organization": "Leibniz Centre for Agricultural Landscape Research (ZALF e.V.);University of Potsdam", "roles": ["contributor"]}], "title_alternate": "Data collection: Part 1/4, Table: Pflanze"}, "links": [{"href": "https://maps.bonares.de/mapapps/resources/apps/bonares/index.html?lang=en&mid=d36ad69a-42ed-42b8-be24-5492802fa876", "rel": "information"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/d36ad69a-42ed-42b8-be24-5492802fa876", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "d36ad69a-42ed-42b8-be24-5492802fa876", "name": "item", "description": "d36ad69a-42ed-42b8-be24-5492802fa876", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/d36ad69a-42ed-42b8-be24-5492802fa876"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"interval": ["1972-04-11T00:00:00Z", "1972-10-27T00:00:00Z"]}}, {"id": "gonzalezalfaro,2015", "type": "Feature", "geometry": null, "properties": {"updated": "2026-06-26T16:36:15Z", "type": "Journal Article", "created": "2017-12-22", "description": "It has been established that H+ secretion can be maintained in frog stomach in the absence of exogenous CO2 by using a nutrient bathing fluid containing 25 mM H2PO4 (pH approximately equal to 4.5) or by lowering the pH of a nonbuffered nutrient solution to about 3.0-3.6. Exogenous CO2 in the presence of these nutrient solutions uniformly caused a marked decrease in H+ secretion, PD, adn short-circuit current (Isc) and an increase in transmucosal resistance (R). Elevation of nutrient [k+] to 83 mM reduced R significantly but transiently without change in H+ when nutrient pH less than 5.0, whereas R returned to base line and H+ increased when nutrient pH greater than 5.0. Acidification of the nutrient medium in the presence of exogenous CO2 results in inhibition of the secretory pump, probably by decreasing intracellular pH, and also interferes with conductance at the nutrient membrane. Removal of exogenous CO2 from standard bicarbonate nutrient solution reduced by 50% the H+, PD, and Isc without change in R; K+-free nutrient solutions reverse these changes in Isc and PD but not in H+. The dropping PD and rising R induced by K+-free nutrient solutions in 5% CO2 - 95% O2 are returned toward normal by 100% O2. Our findings support an important role for exogenous CO2 in maintaining normal acid-base balance in frog mucosa by acting as an acidifying agent.
", "keywords": ["Acid-Base Equilibrium", "0301 basic medicine", "Rana catesbeiana", "Carbon Dioxide", "Hydrogen-Ion Concentration", "Phosphates", "Electrophysiology", "Solutions", "Bicarbonates", "03 medical and health sciences", "0302 clinical medicine", "Gastric Mucosa", "Potassium", "Animals", "Anura"], "contacts": [{"organization": "William Silen, JG Forte, T E Machen,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/gonzalezalfaro,2015"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/American%20Journal%20of%20Physiology-Legacy%20Content", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "gonzalezalfaro,2015", "name": "item", "description": "gonzalezalfaro,2015", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/gonzalezalfaro,2015"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "1975-09-01T00:00:00Z"}}, {"id": "guo,t.,2015", "type": "Feature", "geometry": null, "properties": {"updated": "2026-06-26T16:36:15Z", "type": "Journal Article", "created": "2017-12-22", "description": "It has been established that H+ secretion can be maintained in frog stomach in the absence of exogenous CO2 by using a nutrient bathing fluid containing 25 mM H2PO4 (pH approximately equal to 4.5) or by lowering the pH of a nonbuffered nutrient solution to about 3.0-3.6. Exogenous CO2 in the presence of these nutrient solutions uniformly caused a marked decrease in H+ secretion, PD, adn short-circuit current (Isc) and an increase in transmucosal resistance (R). Elevation of nutrient [k+] to 83 mM reduced R significantly but transiently without change in H+ when nutrient pH less than 5.0, whereas R returned to base line and H+ increased when nutrient pH greater than 5.0. Acidification of the nutrient medium in the presence of exogenous CO2 results in inhibition of the secretory pump, probably by decreasing intracellular pH, and also interferes with conductance at the nutrient membrane. Removal of exogenous CO2 from standard bicarbonate nutrient solution reduced by 50% the H+, PD, and Isc without change in R; K+-free nutrient solutions reverse these changes in Isc and PD but not in H+. The dropping PD and rising R induced by K+-free nutrient solutions in 5% CO2 - 95% O2 are returned toward normal by 100% O2. Our findings support an important role for exogenous CO2 in maintaining normal acid-base balance in frog mucosa by acting as an acidifying agent.
", "keywords": ["Acid-Base Equilibrium", "0301 basic medicine", "Rana catesbeiana", "Carbon Dioxide", "Hydrogen-Ion Concentration", "Phosphates", "Electrophysiology", "Solutions", "Bicarbonates", "03 medical and health sciences", "0302 clinical medicine", "Gastric Mucosa", "Potassium", "Animals", "Anura"], "contacts": [{"organization": "William Silen, JG Forte, T E Machen,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/guo,t.,2015"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/American%20Journal%20of%20Physiology-Legacy%20Content", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "guo,t.,2015", "name": "item", "description": "guo,t.,2015", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/guo,t.,2015"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "1975-09-01T00:00:00Z"}}, {"id": "han,s.,2014", "type": "Feature", "geometry": null, "properties": {"updated": "2026-06-26T16:36:16Z", "type": "Journal Article", "created": "2017-12-22", "description": "The effects of pH variation on ionic exchange and mechanical function were studied in the arterially perfused rat and rabbit septa. The pH and PCO2 of the control perfusate were 7.40 and 39 mmHg, respectively. In the rabbit septum a metabolic acidosis (pH equals 6.82, PCO2 equals 39 mmHg) caused a loss of 16% of control tension in 12 min. Na+ and K+ exchange were unaltered. A comparable respiratory acidosis (pH equals 6.81, PCO2 equals 159 mmHg) caused a 51% loss of tension in 2 min. Na+ exchange was unaltered but K+ efflux fell from 8.9 +/- 0.6 (mean +/- SE) to 4.9 +/- 0.3 mmol/kg dry wt per min (P less than 0.001, n equals 10). A net gain of K+ of 16.9 +/- 1.7 (n equals 14) mmol/kg dry wt occurred and was attributable to a delayed fall in K+ influx relative to efflux over 15 min. The net gain could not be mimicked by epinephrine administration or blocked by propranolol and was absent in the beating rat septum and the quiescent rabbit septum. These results suggest that the net uptake of K+, which appears to be dependent on a period of depolarization, and the changes of contractility are controlled by the H+ ion concentration at a cellular site whose exchange with the extracellular space is characterized by a considerable restriction of diffusion. Changes of contractility are not related to the net uptake of K+.
", "keywords": ["Male", "0301 basic medicine", "Epinephrine", "Myocardium", "Sodium", "Heart", "Hydrogen-Ion Concentration", "In Vitro Techniques", "Propranolol", "Rats", "Ion Exchange", "Perfusion", "03 medical and health sciences", "0302 clinical medicine", "Potassium", "Animals", "Acidosis", " Respiratory", "Rabbits", "Acidosis", "Alkalosis", " Respiratory"], "contacts": [{"organization": "PA Poole-Wilson, GA Langer,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/han,s.,2014"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/American%20Journal%20of%20Physiology-Legacy%20Content", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "han,s.,2014", "name": "item", "description": "han,s.,2014", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/han,s.,2014"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "1975-09-01T00:00:00Z"}}, {"id": "e6879130-e536-4575-aaf6-69403fc37882", "type": "Feature", "geometry": {"type": "Polygon", "coordinates": [[[11.5, 51.29], [11.5, 53.98], [15.34, 53.98], [15.34, 51.29], [11.5, 51.29]]]}, "properties": {"themes": [{"concepts": [{"id": "environment"}], "scheme": "https://standards.iso.org/iso/19139/resources/gmxCodelists.xml#MD_TopicCategoryCode"}, {"concepts": [{"id": "ph sensors"}, {"id": "optical sensors"}, {"id": "soil pH"}, {"id": "soil organic carbon"}, {"id": "soil organic matter"}, {"id": "nitrogen"}, {"id": "potassium"}, {"id": "magnesium"}, {"id": "phosphorus"}, {"id": "soil chemicophysical properties"}, {"id": "soil fertility"}, {"id": "soil texture"}, {"id": "soil maps"}, {"id": "fertilization"}, {"id": "limes"}, {"id": "soil management"}, {"id": "soil properties"}], "scheme": "AGROVOC Multilingual agricultural thesaurus"}, {"concepts": [{"id": "Boden"}, {"id": "soil acidification"}, {"id": "soil fertility"}, {"id": "soil fertilisation"}, {"id": "soil map"}, {"id": "soil texture"}, {"id": "mapping"}, {"id": "sensor"}, {"id": "pH-value"}, {"id": "organic carbon"}, {"id": "total organic carbon"}, {"id": "dead organic matter"}, {"id": "lime"}], "scheme": "GEMET - Concepts, version 2.4"}, {"concepts": [{"id": "opendata"}, {"id": "Soil"}, {"id": "agriculture"}], "scheme": "INSPIRE"}], "rights": "Restrictions applied to assure the protection of privacy or intellectual property, and any special restrictions or limitations or warnings on using the resource or metadata. Reports, articles, papers, scientific and non-scientific works of any form, including tables, maps, or any other kind of output, in printed or electronic form, based in whole or in part on the data supplied, must contain an acknowledgement of the form: \u201cData reused from the BonaRes Data Centre www.bonares.de.\u201d Although every care has been taken in preparing and testing the soil profile data, the author and BonaRes Data Centre cannot guarantee that the data are correct; neither does the author and BonaRes Data Centre accept any liability whatsoever for any error, missing data or omission in the data, or for any loss or damage arising from its use. The author and BonaRes Data Centre will not be responsible for any direct or indirect use which might be made of the data.", "updated": "2025-04-07", "type": "Dataset", "created": "2023-08-29", "language": "eng", "title": "Reference soil samples (pH, soil texture, SOC, TC, TN, P, K, Mg) from the project \"pH-BB: Precision liming in Brandenburg\" - data set 1 (farm 1)", "description": "Within the EIP-AGRI-funded project \u201cpH-BB: Precision liming in Brandenburg\u201d, research was conducted on improving the management of soil acidity on farms in the federal state of Brandenburg (Germany). With the help of mobile proximal soil sensors, the lime-relevant soil parameters pH value, texture and soil organic matter were recorded time-saving, cost-effectively and on a small scale. Regulations for processing the sensor data and deriving fertilization recommendations were developed. An important sub-step in determining the lime requirement is the site-specific calibration of the sensor data in order to obtain high-resolution maps of the lime-relevant soil parameters. For this purpose, soil samples were taken from all mapped plots and analyzed for pH, soil organic carbon and grain size distribution. The analyzed results of the first out of three participating farms in the project are available in this data set. Furthermore, in addition to the analysis of the pH value, a basic soil investigation was carried out determining the plant-availability of phosphorus, potassium and magnesium. To date, the dataset consists of a total of 308 entries for pH, 222 for soil organic carbon, total carbon and total nitrogen content, 274 for P, K and Mg, and 327 for soil texture (clay, fine silt, medium silt, coarse silt, fine sand, medium sand, coarse sand). For each measurement point, both the coordinates in UTM format (EPSG 25833) and the measurement date were recorded This table contains the index of all tables forming this data collection.\n\nRelated datasets are listed in the metadata element 'Related Identifier'.\nDataset version 1.0", "formats": [{"name": "CSV"}], "keywords": ["ph sensors", "optical sensors", "soil pH", "soil organic carbon", "soil organic matter", "nitrogen", "potassium", "magnesium", "phosphorus", "soil chemicophysical properties", "soil fertility", "soil texture", "soil maps", "fertilization", "limes", "soil management", "soil properties", "Boden", "soil acidification", "soil fertility", "soil fertilisation", "soil map", "soil texture", "mapping", "sensor", "pH-value", "organic carbon", "total organic carbon", "dead organic matter", "lime", "opendata", "Soil", "agriculture"], "contacts": [{"name": "Eric B\u00f6necke", "organization": "Leibniz Institute of Vegetable and Ornamental Crops - IGZ", "position": null, "roles": ["author"], "phones": [{"value": null}], "emails": [{"value": "boenecke@igzev.de"}], "addresses": [{"deliveryPoint": [null], "city": null, "administrativeArea": null, "postalCode": null, "country": null}], "links": [{"href": {"url": "https://orcid.org", "protocol": null, "protocol_url": "", "name": "0000-0001-9563-8186", "name_url": "", "description": "ORCID", "description_url": "", "applicationprofile": null, "applicationprofile_url": "", "function": null}}]}, {"name": "J\u00f6rg R\u00fchlmann", "organization": "Leibniz Institute of Vegetable and Ornamental Crops - 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Concepts, version 2.4"}], "rights": "Restrictions applied to assure the protection of privacy or intellectual property, and any special restrictions or limitations or warnings on using the resource or metadata. Reports, articles, papers, scientific and non - scientific works of any form, including tables, maps, or any other kind of output, in printed or electronic form, based in whole or in part on the data supplied, must contain an acknowledgement of the form: \"Data reused from the BonaRes Data Centre www.bonares.de. This data were created as part of the Other's research activities.\" Although every care has been taken in preparing and testing the data, the Other and the BonaRes Data Centre cannot guarantee that the data are correct; neither does the Other and the BonaRes Data Centre accept any liability whatsoever for any error, missing data or omission in the data, or for any loss or damage arising from its use. The Other and BonaRes Data Centre will not be responsible for any direct or indirect use which might be made of the data.", "updated": "2021-06-10", "type": "Dataset", "created": "2021-05-25", "language": "eng", "title": "Terrestrial and Aquatic Kraatz and Rittgarten Kettle Hole Experiments (Soil driving cores)", "description": "This table is part of a data set collection of kettle hole studies in the frame of the SAW project \"LandScales\" and includes topographical features (based on a DEM, 1x1m), horizon depths and soil types around Kraatz kettle hole, at positions, which were sampled by soil driving cores. It is connected to the mother table (ID).", "formats": [{"name": "CSV"}], "keywords": ["Soil", "tillage erosion", "erosion", "agricultural landscape", "agricultural research", "inland waters", "sediment", "colluvium", "metals", "phosphorus", "total phosphorus", "calcium", "iron", "potassium", "biogeochemistry", "Luvisols", "Regosols", "Phragmites australis", "topography", "opendata", "kettle holes", "Boden", "Landwirtschaft", "Freilandversuch"], "contacts": [{"name": "Kai Nils Nitzsche", "organization": "Leibniz Centre for Agricultural Landscape Research (ZALF)", "position": "Research Assistant", "roles": ["author"], "phones": [{"value": null}], "emails": [{"value": "kai.nitzsche@jamstec.go.jp"}], "addresses": [{"deliveryPoint": ["Eberswalder Str. 84"], "city": "Muencheberg", "administrativeArea": null, "postalCode": "15374", "country": "Deutschland"}], "links": [{"href": null}]}, {"name": "Katrin Premke", "organization": "Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB), Chemical Analytic and Biogeochemistry", "position": "Research Assistant", "roles": ["projectLeader"], "phones": [{"value": null}], "emails": [{"value": "katrin.premke@charite.de"}], "addresses": [{"deliveryPoint": ["Mueggelseedamm 310"], "city": "Berlin", "administrativeArea": null, "postalCode": "12587", "country": "Germany"}], "links": [{"href": null}]}, {"name": "BonaRes Data Centre", "organization": "Leibniz Centre for Agricultural Landscape Research (ZALF)", "position": "Research Platform 'Data Analysis & Simulation' - WG Geodata", "roles": ["publisher"], "phones": [{"value": "+49 33432 82 171"}], "emails": [{"value": "bonares-datenzentrum@zalf.de"}], "addresses": [{"deliveryPoint": ["Eberswalder Strasse 84"], "city": "M\u00fcncheberg", "administrativeArea": "Brandenburg", "postalCode": "15374", "country": "Germany"}], "links": [{"href": null}]}, {"name": "Carsten Hoffmann", "organization": "Leibniz Centre for Agricultural Landscape Research (ZALF)", "position": "Research Assistant", "roles": ["researcher"], "phones": [{"value": null}], "emails": [{"value": "hoffmann@zalf.de"}], "addresses": [{"deliveryPoint": ["Eberswalder Str. 84"], "city": "Muencheberg", "administrativeArea": null, "postalCode": "15374", "country": "Germany"}], "links": [{"href": null}]}, {"name": "Andreas Kleeberg", "organization": "State Laboratory Berlin-Brandenburg", "position": "Research Assistant", "roles": ["researcher"], "phones": [{"value": null}], "emails": [{"value": "andreas.kleeberg@landeslabor-bbb.de"}], "addresses": [{"deliveryPoint": ["Rudower Chaussee 39"], "city": "Berlin", "administrativeArea": null, "postalCode": "12489", "country": "Germany"}], "links": [{"href": null}]}, {"name": "Christoph Merz", "organization": "Leibniz Centre for Agricultural Landscape Research (ZALF)", "position": "Research Assistant", "roles": ["researcher"], "phones": [{"value": null}], "emails": [{"value": "merz@zalf.de"}], "addresses": [{"deliveryPoint": ["Eberswalder Str. 84"], "city": 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Reports, articles, papers, scientific and non - scientific works of any form, including tables, maps, or any other kind of output, in printed or electronic form, based in whole or in part on the data supplied, must contain an acknowledgement of the form: \"Data reused from the BonaRes Data Centre www.bonares.de. This data were created as part of the Other's research activities.\" Although every care has been taken in preparing and testing the data, the Other and the BonaRes Data Centre cannot guarantee that the data are correct; neither does the Other and the BonaRes Data Centre accept any liability whatsoever for any error, missing data or omission in the data, or for any loss or damage arising from its use. The Other and BonaRes Data Centre will not be responsible for any direct or indirect use which might be made of the data.", "updated": "2025-05-12", "type": "Dataset", "created": "2024-08-20", "language": "eng", "title": "50 years box plot experiment in Grossbeeren (1972 - 2022) - Plots", "description": "The Box Plot Experiment in Grossbeeren was set up in 1972 to investigate the effect of different fertilization strategies within an irrigated vegetable crop rotation system for three different soils. Therefore, this vegetable long-term fertilization experiment can be used to investigate different plant-soil-systems under the same climatic conditions. The experimented was halted in 2022. The experimental site (52\u00b021\u201901.30\u2019\u2019 N, 13\u00b019\u201905.47\u2019\u2019 E, 50 m a.s.l.) is located in the transition zone between the more maritime-affected Northern German Plain and the continental climate of the European mainland. Weather data were collected in an agrometeorological station close to the experimental area. The long-term means (1991-2020) for air temperature and annual precipitation are 9.7 \u00b0C and 492 mm. The single plots are quadratic concrete boxes with walls of 10 cm thickness, a surface area of 4 m2 and a depth of 75 cm. The upper 50 cm are filled with the tested soils; the lower 25 cm comprises a coarse-sandy drainage layer. The three soil types are Arenic Luvisol (weak loamy sand), Gleyic Fluvisol (heavy sandy loam) and Luvic-Phaeozem (medium clayey silt) according to the World Reference Base \u2013 WRB (and the Bodenkundliche Kartieranleitung \u2013 KA4). Within 10 rotations, the vegetable species white cabbage (Brassica oleracea L. var. capitata f. alba), carrot (Daucus carota L.), cucumber (Cucumis sativus L.), leek (Allium porrum L.) and celery (Apium graveolens L. var. rapaceum Mill.) were cultivated. No celery was cultivated during the first rotation. The experiment consists of 12 fertilization treatments in different combinations of mineral N fertilization and organic amendments and as quadruplicate for each of the three soils. The experimental set-up scheme can be found in the supplementary material. Mineral N fertilizer was applied as calcium ammonium nitrate. Mineral P and K fertilization was uniform for all treatments. Total N and total C in soil, plant and organic amendments were determined using a CNS analyser VARIO El (Elemental Hanau) since 1995 and before by wet combustion with K2Cr2O7 und H2SO4. C and N in the soil samples and N in the plant samples were analysed annually. The C contents of the crop residues (leaf + stalk + root) of the five vegetable species were investigated irregularly. In autumn, the soil was annually dug up to 20 cm by using a spade. Weeds were removed by a combination of mechanical (cultivator, rake or hoe) and chemical measures. Insect protection nets, insecticides or fungicides were used where necessary. Approximately 150 mm per year was additionally irrigated with a sprinkler system. More details about the experiment\u2019s description can be found in the supplementary material. 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IGZ", "position": null, "roles": ["projectLeader"], "phones": [{"value": null}], "emails": [{"value": "ruehlmann@igzev.de"}], "addresses": [{"deliveryPoint": [null], "city": null, "administrativeArea": null, "postalCode": null, "country": null}], "links": [{"href": null}]}, {"name": "ZALF", "organization": "Leibniz Centre for Agricultural Landscape Research (ZALF)", "position": "Research Platform 'Data Analysis & Simulation' - Workgroup Research Data Management", "roles": ["publisher"], "phones": [{"value": "+49 33432 82 300"}], "emails": [{"value": "dataservice@zalf.de"}], "addresses": [{"deliveryPoint": ["Eberswalder Strasse 84"], "city": "M\u00fcncheberg", "administrativeArea": "Brandenburg", "postalCode": "15374", "country": "Germany"}], "links": [{"href": null}]}, {"organization": "Martin-Luther University Halle-Wittenberg;Leibniz-Institut f\u00fcr Gem\u00fcse- und Zierpflanzenbau - IGZ", "roles": ["contributor"]}], "title_alternate": "LTE: Part 1/25, table: Plots"}, "links": [{"href": "https://maps.bonares.de/mapapps/resources/apps/bonares/index.html?lang=en&mid=03b52930-0210-4bfc-a4ac-75f7544ce7a5", "rel": "download"}, {"href": "https://metadata.bonares.de:443/smartEditor/preview/Sellerie_2016.JPG", "name": "preview", "description": "Web image thumbnail (URL)", "protocol": "WWW:LINK-1.0-http--image-thumbnail", "rel": "preview"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/03b52930-0210-4bfc-a4ac-75f7544ce7a5", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "03b52930-0210-4bfc-a4ac-75f7544ce7a5", "name": "item", "description": "03b52930-0210-4bfc-a4ac-75f7544ce7a5", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/03b52930-0210-4bfc-a4ac-75f7544ce7a5"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2025-05-12T00:00:00Z"}}, {"id": "1770c71c-b36f-404d-b336-8b96476cfec6", "type": "Feature", "geometry": {"type": "Polygon", "coordinates": [[[12.22, 53.99], [12.22, 54.02], [12.28, 54.02], [12.28, 53.99], [12.22, 53.99]]]}, "properties": {"themes": [{"concepts": [{"id": "farming"}], "scheme": "https://standards.iso.org/iso/19139/resources/gmxCodelists.xml#MD_TopicCategoryCode"}, {"concepts": [{"id": "Soil"}, {"id": "elements"}, {"id": "total phosphorus"}, {"id": "carbon"}, {"id": "calcium"}, {"id": "aluminium"}, {"id": "iron"}, {"id": "manganese"}, {"id": "nitrogen"}, {"id": "sulfur"}, {"id": "potassium"}, {"id": "magnesium"}, {"id": "zinc"}, {"id": "leaves"}, {"id": "stems"}, {"id": "shoots"}, {"id": "grain"}, {"id": "slope"}, {"id": "spring barley"}], "scheme": "AGROVOC Multilingual agricultural thesaurus"}, {"concepts": [{"id": "opendata"}, {"id": "Elemente"}, {"id": "Kohlenstoff"}, {"id": "Aluminium"}, {"id": "Calcium"}, {"id": "Eisen"}, {"id": "Phosphor"}, {"id": "Stickstoff"}, {"id": "Zink"}, {"id": "Schwefel"}], "scheme": "Individual"}, {"concepts": [{"id": "Boden"}], "scheme": "GEMET - INSPIRE themes, version 1.0"}], "rights": "Restrictions applied to assure the protection of privacy or intellectual property, and any special restrictions or limitations or warnings on using the resource or metadata. Reports, articles, papers, scientific and non - scientific works of any form, including tables, maps, or any other kind of output, in printed or electronic form, based in whole or in part on the data supplied, must contain an acknowledgement of the form: \"Data reused from the BonaRes Data Centre www.bonares.de. This data were created as part of the BonaRes Module A-Project - BonaRes - InnoSoilPhos's research activities.\" Although every care has been taken in preparing and testing the data, the BonaRes Module A-Project - BonaRes - InnoSoilPhos and the BonaRes Data Centre cannot guarantee that the data are correct; neither does the BonaRes Module A-Project - BonaRes - InnoSoilPhos and the BonaRes Data Centre accept any liability whatsoever for any error, missing data or omission in the data, or for any loss or damage arising from its use. The BonaRes Module A-Project - BonaRes - InnoSoilPhos and BonaRes Data Centre will not be responsible for any direct or indirect use which might be made of the data.", "updated": "2023-04-17", "type": "Dataset", "created": "2022-04-28", "language": "eng", "title": "Lysimeter data Rostock: characteristics of maize plants grown with and without underfoot fertilization in 2021", "description": "The dataset contains fresh and dry plant mass, BBCH development stages as well as plant height and element concentrations (total C, N, S, Al, Fe, Ca, K, Mg, P, and Zn) of maize grown in lysimeter areas which were either fertilized or unfertilized with P- und S-containing fertilizer pellets. The plants were grown under varying redox conditions on three soil profiles from along a hill slope in Northern Germany in 2021. \nResearch question: Controlled drainage may affect element mobilization in soil, in particular phosphorus. Three soil profiles with redoximorphic features were selected from along a slight hill slope to establish three lysimeter monoliths. Water levels of the monoliths were adjusted to high and low water table to mimic closed and open drainage, respectively. Maize plants were sown with either underfoot fertilization or no addition of P- & S-fertilizer. Plants were harvested after 4, 6, 8, 12 and 20 weeks, respectively. Plant developmental stage, plant height, dry mass as well as element concentrations (total C, N, S, Al, Fe, Ca, K, Mg, P, and Zn) were determined to assess the effect of the fertilizer.\n\n\nResearch domain: Plant Nutrition\n\nResearch question: Controlled drainage may affect element mobilization in soil, in particular phosphorus. Three soil profiles with redoximorphic features were selected from along a slight hill slope to establish three lysimeter monoliths. Water levels of the monoliths were adjusted to high and low water table to mimic closed and open drainage, respectively. Maize plants were sown with either underfoot fertilization or no addition of P- & S-fertilizer. Plants were harvested after 4, 6, 8, 12 and 20 weeks, respectively. Plant developmental stage, plant height, dry mass as well as element concentrations (total C, N, S, Al, Fe, Ca, K, Mg, P, and Zn) were determined to assess the effect of the fertilizer.", "formats": [{"name": "CSV"}], "keywords": ["Soil", "elements", "total phosphorus", "carbon", "calcium", "aluminium", "iron", "manganese", "nitrogen", "sulfur", "potassium", "magnesium", "zinc", "leaves", "stems", "shoots", "grain", "slope", "spring barley", "opendata", "Elemente", "Kohlenstoff", "Aluminium", "Calcium", "Eisen", "Phosphor", "Stickstoff", "Zink", "Schwefel", "Boden"], "contacts": [{"name": "Baumann, Karen", "organization": "University of Rostock; present organization: University of Vechta", "position": null, "roles": ["author"], "phones": [{"value": null}], "emails": [{"value": "karen.baumann@uni-rostock.de; present email: karen.baumann@uni-vechta.de"}], "addresses": [{"deliveryPoint": [null], "city": null, "administrativeArea": null, "postalCode": null, "country": null}], "links": [{"href": {"url": null, "protocol": null, "protocol_url": "", "name": "0000-0003-1341-052X", "name_url": "", "description": "ORCID", "description_url": "", "applicationprofile": null, "applicationprofile_url": "", "function": null}}]}, {"name": "Leinweber, Peter", "organization": "University of Rostock", "position": null, "roles": ["projectLeader"], "phones": [{"value": null}], "emails": [{"value": "peter.leinweber@uni-rostock.de"}], "addresses": [{"deliveryPoint": [null], "city": null, "administrativeArea": null, "postalCode": null, "country": null}], "links": [{"href": {"url": null, "protocol": null, "protocol_url": "", "name": "0000-0003-3776-2984", "name_url": "", "description": "ORCID", "description_url": "", "applicationprofile": null, "applicationprofile_url": "", "function": null}}]}, {"name": "BonaRes Data Centre", "organization": "Leibniz Centre for Agricultural Landscape Research (ZALF)", "position": "Research Platform 'Data Analysis & Simulation' - Workgroup Research Data Management", "roles": ["publisher"], "phones": [{"value": "+49 33432 82 300"}], "emails": [{"value": "dataservice@zalf.de"}], "addresses": [{"deliveryPoint": ["Eberswalder Strasse 84"], "city": "M\u00fcncheberg", "administrativeArea": "Brandenburg", "postalCode": "15374", "country": "Germany"}], "links": [{"href": null}]}, {"organization": "University of Rostock; present organization: University of Vechta", "roles": ["contributor"]}]}, "links": [{"href": "https://maps.bonares.de/mapapps/resources/apps/bonares/index.html?lang=en&mid=1770c71c-b36f-404d-b336-8b96476cfec6", "rel": "download"}, {"rel": "self", "type": "application/geo+json", "title": "1770c71c-b36f-404d-b336-8b96476cfec6", "name": "item", "description": "1770c71c-b36f-404d-b336-8b96476cfec6", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/1770c71c-b36f-404d-b336-8b96476cfec6"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2023-04-17T00:00:00Z"}}, {"id": "2c2f51bc-7b42-40ee-9591-fbe80dcd0226", "type": "Feature", "geometry": {"type": "Polygon", "coordinates": [[[5.81, 47.26], [5.81, 54.76], [15.77, 54.76], [15.77, 47.26], [5.81, 47.26]]]}, "properties": {"themes": [{"concepts": [{"id": "farming"}], "scheme": "https://standards.iso.org/iso/19139/resources/gmxCodelists.xml#MD_TopicCategoryCode"}, {"concepts": [{"id": "Soil"}, {"id": "Biomass"}, {"id": "carbon capture and storage"}, {"id": "crop yield"}, {"id": "agroforestry"}, {"id": "fertilizer application"}, {"id": "ecosystem services"}, {"id": "nitrogen"}, {"id": "phosphorus"}, {"id": "potassium"}, {"id": "sustainability"}], "scheme": "AGROVOC Multilingual agricultural thesaurus"}, {"concepts": [{"id": "opendata"}, {"id": "sustainable food production"}, {"id": "fertilizer application rates"}], "scheme": "Individual"}, {"concepts": [{"id": "Boden"}], "scheme": "GEMET - INSPIRE themes, version 1.0"}, {"concepts": [{"id": "Europe"}, {"id": "Germany"}, {"id": "Thuringia"}, {"id": "Jena"}, {"id": "Dornburg"}], "scheme": "individual"}], "license": "CC BY", "rights": "Restrictions applied to assure the protection of privacy or intellectual property, and any special restrictions or limitations or warnings on using the resource or metadata. Reports, articles, papers, scientific and non - scientific works of any form, including tables, maps, or any other kind of output, in printed or electronic form, based in whole or in part on the data supplied, must contain an acknowledgement of the form: \"Data reused from the BonaRes Data Centre www.bonares.de. This data were created as part of the BonaRes Module A-Project - BonaRes - SIGNAL's research activities.\" Although every care has been taken in preparing and testing the data, the BonaRes Module A-Project - BonaRes - SIGNAL and the BonaRes Data Centre cannot guarantee that the data are correct; neither does the BonaRes Module A-Project - BonaRes - SIGNAL and the BonaRes Data Centre accept any liability whatsoever for any error, missing data or omission in the data, or for any loss or damage arising from its use. The BonaRes Module A-Project - BonaRes - SIGNAL and BonaRes Data Centre will not be responsible for any direct or indirect use which might be made of the data.", "updated": "2026-01-15", "type": "Dataset", "created": "2025-05-12", "language": "eng", "title": "Replicated data for: Reduced fertilization in agroforestry maintains ecosystem multifunctionality and economic returns", "description": "Agroforestry as a sustainable agricultural intensification strategy is expected to ensure optimal resource use, and uncompromised provision of ecosystem services and economic returns when compared to treeless open croplands. Here, we evaluated the effects of fertilization rates and land use management on ecosystem functions, based on 37 ecological indicators, measured over a 5-year period (2019\u20132023). Reduced fertilization did not significantly affect overall ecosystem multifunctionality or any ecosystem function in either agroforestry or open cropland, although some ecological indicators differed. This lack of reduced fertilization effect indicates a legacy effect of chronic over-fertilization in this agroecosystem. Compared to open cropland, agroforestry enhanced carbon sequestration but decreased water filtration due to spatially unadjusted fertilization rates in tree-crop competition zones. Economic performance among fertilization and land use managements was comparable. We conclude that adopting agroforestry and reducing current fertilization levels by 50% are feasible without compromising food production, ecological and economic benefits.", "formats": [{"name": "CSV"}], "keywords": ["Soil", "Biomass", "carbon capture and storage", "crop yield", "agroforestry", "fertilizer application", "ecosystem services", "nitrogen", "phosphorus", "potassium", "sustainability", "opendata", "sustainable food production", "fertilizer application rates", "Boden", "Europe", "Germany", "Thuringia", "Jena", "Dornburg"], "contacts": [{"name": "Leibniz Centre for Agricultural Landscape Research", "organization": "ZALF", "position": "Computation and Data Service Platform - Workgroup Research Data Management", "roles": ["publisher"], "phones": [{"value": "+49 33432 82 300"}], "emails": [{"value": "dataservice@zalf.de"}], "addresses": [{"deliveryPoint": ["Eberswalder Strasse 84"], "city": "M\u00fcncheberg", "administrativeArea": "Brandenburg", "postalCode": "15374", "country": "Germany"}], "links": [{"href": null}]}, {"name": "Raphael Manu", "organization": "University of G\u00f6ttingen", "position": null, "roles": ["author"], "phones": [{"value": null}], "emails": [{"value": "raphael.manu@uni-goettingen.de"}], "addresses": [{"deliveryPoint": [null], "city": null, "administrativeArea": null, "postalCode": null, "country": null}], "links": [{"href": {"url": null, "protocol": null, "protocol_url": "", "name": "0000-0002-9607-7357", "name_url": "", "description": "ORCID", "description_url": "", "applicationprofile": null, "applicationprofile_url": "", "function": null}}]}, {"name": "Xenia Bischel", "organization": "Georg-August-Universit\u00e4t G\u00f6ttingen", "position": null, "roles": ["author"], "phones": [{"value": null}], "emails": [{"value": "xenia.bischel@uni-goettingen.de"}], "addresses": [{"deliveryPoint": [null], "city": null, "administrativeArea": null, "postalCode": null, "country": null}], "links": [{"href": null}]}, {"name": "Marcus Schmidt", "organization": "Georg-August-Universit\u00e4t G\u00f6ttingen", "position": null, "roles": ["author"], "phones": [{"value": null}], "emails": [{"value": "marcus.schmidt@zalf.de"}], "addresses": [{"deliveryPoint": [null], "city": null, "administrativeArea": null, "postalCode": null, "country": null}], "links": [{"href": null}]}, {"name": "Sarah Choe", "organization": "Georg-August-Universit\u00e4t G\u00f6ttingen", "position": null, "roles": ["author"], "phones": [{"value": null}], "emails": [{"value": "sarah.choe@uni-goettingen.de"}], "addresses": [{"deliveryPoint": [null], "city": null, "administrativeArea": null, "postalCode": null, "country": null}], "links": [{"href": {"url": null, "protocol": null, "protocol_url": "", "name": "0009-0006-1819-4183", "name_url": "", "description": "ORCID", "description_url": "", "applicationprofile": null, "applicationprofile_url": "", "function": null}}]}, {"name": "Marife Corre", "organization": "Georg-August-Universit\u00e4t G\u00f6ttingen", "position": null, "roles": ["author"], "phones": [{"value": null}], "emails": [{"value": "mcorre@gwdg.de"}], "addresses": [{"deliveryPoint": [null], "city": null, "administrativeArea": null, "postalCode": null, "country": null}], "links": [{"href": {"url": null, "protocol": null, "protocol_url": "", "name": "0000-0003-0359-2104", "name_url": "", "description": "ORCID", "description_url": "", "applicationprofile": null, "applicationprofile_url": "", "function": null}}]}, {"name": "Lukas Beule", "organization": "Georg-August-Universit\u00e4t G\u00f6ttingen", "position": null, "roles": ["author"], "phones": [{"value": null}], "emails": [{"value": "Lukas.Beule@julius-kuehn.de"}], "addresses": [{"deliveryPoint": [null], "city": null, "administrativeArea": null, "postalCode": null, "country": null}], "links": [{"href": null}]}, {"name": "Maren Langhof", "organization": "Julius K\u00fchn-Institut: Braunschweig", "position": null, "roles": ["author"], "phones": [{"value": null}], "emails": [{"value": "Maren.Langhof@julius-kuehn.de"}], "addresses": [{"deliveryPoint": [null], "city": null, "administrativeArea": null, "postalCode": null, "country": null}], "links": [{"href": {"url": null, "protocol": null, "protocol_url": "", "name": "0000-0001-7691-7155", "name_url": "", "description": "ORCID", "description_url": "", "applicationprofile": null, "applicationprofile_url": "", "function": null}}]}, {"name": "Carola Paul", "organization": "Georg-August-Universit\u00e4t G\u00f6ttingen", "position": null, "roles": ["author"], "phones": [{"value": null}], "emails": [{"value": "mcorre@gwdg.de"}], "addresses": [{"deliveryPoint": [null], "city": null, "administrativeArea": null, "postalCode": null, "country": null}], "links": [{"href": {"url": null, "protocol": null, "protocol_url": "", "name": "0000-0003-0359-2104", "name_url": "", "description": "ORCID", "description_url": "", "applicationprofile": null, "applicationprofile_url": "", "function": null}}]}, {"name": "Edzo Veldkamp", "organization": "University of G\u00f6ttingen", "position": null, "roles": ["projectLeader"], "phones": [{"value": null}], "emails": [{"value": "eveldka@gwdg.de"}], "addresses": [{"deliveryPoint": [null], "city": null, "administrativeArea": null, "postalCode": null, "country": null}], "links": [{"href": {"url": null, "protocol": null, "protocol_url": "", "name": "0000-0002-8318-8349", "name_url": "", "description": "ORCID", "description_url": "", "applicationprofile": null, "applicationprofile_url": "", "function": null}}]}, {"organization": "Georg-August-Universit\u00e4t G\u00f6ttingen;Julius K\u00fchn-Institut: Braunschweig;University of G\u00f6ttingen", "roles": ["contributor"]}]}, "links": [{"href": "https://maps.bonares.de/mapapps/resources/apps/bonares/index.html?lang=en&mid=2c2f51bc-7b42-40ee-9591-fbe80dcd0226", "rel": "information"}, {"rel": "self", "type": "application/geo+json", "title": "2c2f51bc-7b42-40ee-9591-fbe80dcd0226", "name": "item", "description": "2c2f51bc-7b42-40ee-9591-fbe80dcd0226", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/2c2f51bc-7b42-40ee-9591-fbe80dcd0226"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2026-01-15T00:00:00Z"}}, {"id": "dcc61b52-3767-4d29-bcf0-26c5cec0afd0", "type": "Feature", "geometry": {"type": "Polygon", "coordinates": [[[7.56, 51.39], [7.56, 51.53], [7.74, 51.53], [7.74, 51.39], [7.56, 51.39]]]}, "properties": {"themes": [{"concepts": [{"id": "farming"}], "scheme": "https://standards.iso.org/iso/19139/resources/gmxCodelists.xml#MD_TopicCategoryCode"}, {"concepts": [{"id": "Soil"}, {"id": "carbon sequestration"}, {"id": "soil structure"}, {"id": "yield increases"}, {"id": "nitrate-nitrogen"}, {"id": "climatic data"}, {"id": "soil profiles"}, {"id": "soil permeability"}, {"id": "soil fertility"}, {"id": "phosphates"}, {"id": "potassium"}, {"id": "magnesium"}, {"id": "base saturation"}, {"id": "total nitrogen"}, {"id": "humus"}, {"id": "biological activity in soil"}, {"id": "soil pore system"}, {"id": "hydraulic conductivity"}, {"id": "cation exchange capacity"}, {"id": "iron"}, {"id": "manganese"}, {"id": "aluminium"}, {"id": "earthworms"}, {"id": "boundary layers"}, {"id": "soil density"}, {"id": "water storage"}], "scheme": "AGROVOC Multilingual agricultural thesaurus"}, {"concepts": [{"id": "opendata"}, {"id": "carbon balance"}, {"id": "plant-available phosphate"}, {"id": "plant-available potassium"}, {"id": "plant-available magnesium"}, {"id": "organic label (Biosiegel)"}, {"id": "Boden-pH"}, {"id": "calcium-base saturation"}, {"id": "magnesium-base saturation"}, {"id": "sodium-base saturation"}], "scheme": "Individual"}, {"concepts": [{"id": "Boden"}], "scheme": "GEMET - INSPIRE themes, version 1.0"}], "rights": "Restrictions applied to assure the protection of privacy or intellectual property, and any special restrictions or limitations or warnings on using the resource or metadata. Reports, articles, papers, scientific and non - scientific works of any form, including tables, maps, or any other kind of output, in printed or electronic form, based in whole or in part on the data supplied, must contain an acknowledgement of the form: \"Data reused from the BonaRes Data Centre www.bonares.de. This data were created as part of the Other's research activities.\" Although every care has been taken in preparing and testing the data, the Other and the BonaRes Data Centre cannot guarantee that the data are correct; neither does the Other and the BonaRes Data Centre accept any liability whatsoever for any error, missing data or omission in the data, or for any loss or damage arising from its use. The Other and BonaRes Data Centre will not be responsible for any direct or indirect use which might be made of the data.", "updated": "2023-01-09", "type": "Dataset", "created": "2022-11-15", "language": "eng", "title": "Acquisition of soil scientific measurement data as a basis for a later comparison between organic and conventional land management", "description": "The data set contains general characteristic soil features and data on organic matter contents as well as P, K, Mg, Ca, Mg, Na, Nt, NO3,Fe, Al, Mn . They were measured in 1983 at six different sites with alluvial loam sediments in Germany (four cropland and two grassland sites) belonging to one organic farm and one conventional farm at that time. Soil samples were taken for a parallel investigation at each of two comparable sites.\n\nResearch domain: Soil Sciences\n\nResearch question: The initial characteristics of these soils are to serve as a basis for a later study on the question of how organic farming, which has also been practiced on the conventional farm since 1988, has affected the studied characteristics over a period of now 39 and 34 years, respectively.", "formats": [{"name": "CSV"}], "keywords": ["Soil", "carbon sequestration", "soil structure", "yield increases", "nitrate-nitrogen", "climatic data", "soil profiles", "soil permeability", "soil fertility", "phosphates", "potassium", "magnesium", "base saturation", "total nitrogen", "humus", "biological activity in soil", "soil pore system", "hydraulic conductivity", "cation exchange capacity", "iron", "manganese", "aluminium", "earthworms", "boundary layers", "soil density", "water storage", "opendata", "carbon balance", "plant-available phosphate", "plant-available potassium", "plant-available magnesium", "organic label (Biosiegel)", "Boden-pH", "calcium-base saturation", "magnesium-base saturation", "sodium-base saturation", "Boden"], "contacts": [{"name": "Sybille Kurz", "organization": "Rheinische Friedrich-Wilhelms-Universit\u00e4t Bonn", "position": null, "roles": ["author"], "phones": [{"value": null}], "emails": [{"value": "sybille_kurz@t-online.de"}], "addresses": [{"deliveryPoint": [null], "city": null, "administrativeArea": null, "postalCode": null, "country": null}], "links": [{"href": null}]}, {"name": "Kristin Meier", "organization": "Leibniz Centre for Agricultural Landscape Research (ZALF)", "position": null, "roles": ["dataCurator"], "phones": [{"value": null}], "emails": [{"value": "Kristin.Meier@zalf.de"}], "addresses": [{"deliveryPoint": [null], "city": null, "administrativeArea": null, "postalCode": null, "country": null}], "links": [{"href": null}]}, {"name": "Bonares", "organization": "Leibniz Centre for Agricultural Landscape Research (ZALF)", "position": "Research Platform 'Data Analysis & Simulation' - Workgroup Research Data Management", "roles": ["publisher"], "phones": [{"value": "+49 33432 82 300"}], "emails": [{"value": "dataservice@zalf.de"}], "addresses": [{"deliveryPoint": ["Eberswalder Strasse 84"], "city": "M\u00fcncheberg", "administrativeArea": "Brandenburg", "postalCode": "15374", "country": "Germany"}], "links": [{"href": null}]}, {"name": "Sybille Kurz", "organization": "Sybille Kurz", "position": null, "roles": ["projectLeader"], "phones": [{"value": null}], "emails": [{"value": "sybille_kurz@t-online.de"}], "addresses": [{"deliveryPoint": [null], "city": null, "administrativeArea": null, "postalCode": null, "country": null}], "links": [{"href": null}]}, {"organization": "Rheinische Friedrich-Wilhelms-Universit\u00e4t Bonn", "roles": ["contributor"]}]}, "links": [{"href": "https://maps.bonares.de/mapapps/resources/apps/bonares/index.html?lang=en&mid=dcc61b52-3767-4d29-bcf0-26c5cec0afd0", "rel": "download"}, {"href": "https://metadata.bonares.de:443/smartEditor/preview/Standorte_Luftbild-05f27017.jpg", "name": "preview", "description": "Web image thumbnail (URL)", "protocol": "WWW:LINK-1.0-http--image-thumbnail", "rel": "preview"}, {"href": "https://metadata.bonares.de:443/smartEditor/preview/Graphical_Abstract.jpg", "name": "preview", "description": "Web image thumbnail (URL)", "protocol": "WWW:LINK-1.0-http--image-thumbnail", "rel": "preview"}, {"rel": "self", "type": "application/geo+json", "title": "dcc61b52-3767-4d29-bcf0-26c5cec0afd0", "name": "item", "description": "dcc61b52-3767-4d29-bcf0-26c5cec0afd0", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/dcc61b52-3767-4d29-bcf0-26c5cec0afd0"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2023-01-09T00:00:00Z"}}, {"id": "jiang,2014", "type": "Feature", "geometry": null, "properties": {"updated": "2026-06-26T16:39:02Z", "type": "Journal Article", "created": "2017-12-22", "description": "The effects of pH variation on ionic exchange and mechanical function were studied in the arterially perfused rat and rabbit septa. The pH and PCO2 of the control perfusate were 7.40 and 39 mmHg, respectively. In the rabbit septum a metabolic acidosis (pH equals 6.82, PCO2 equals 39 mmHg) caused a loss of 16% of control tension in 12 min. Na+ and K+ exchange were unaltered. A comparable respiratory acidosis (pH equals 6.81, PCO2 equals 159 mmHg) caused a 51% loss of tension in 2 min. Na+ exchange was unaltered but K+ efflux fell from 8.9 +/- 0.6 (mean +/- SE) to 4.9 +/- 0.3 mmol/kg dry wt per min (P less than 0.001, n equals 10). A net gain of K+ of 16.9 +/- 1.7 (n equals 14) mmol/kg dry wt occurred and was attributable to a delayed fall in K+ influx relative to efflux over 15 min. The net gain could not be mimicked by epinephrine administration or blocked by propranolol and was absent in the beating rat septum and the quiescent rabbit septum. These results suggest that the net uptake of K+, which appears to be dependent on a period of depolarization, and the changes of contractility are controlled by the H+ ion concentration at a cellular site whose exchange with the extracellular space is characterized by a considerable restriction of diffusion. Changes of contractility are not related to the net uptake of K+.
", "keywords": ["Male", "0301 basic medicine", "Epinephrine", "Myocardium", "Sodium", "Heart", "Hydrogen-Ion Concentration", "In Vitro Techniques", "Propranolol", "Rats", "Ion Exchange", "Perfusion", "03 medical and health sciences", "0302 clinical medicine", "Potassium", "Animals", "Acidosis", " Respiratory", "Rabbits", "Acidosis", "Alkalosis", " Respiratory"], "contacts": [{"organization": "PA Poole-Wilson, GA Langer,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/jiang,2014"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/American%20Journal%20of%20Physiology-Legacy%20Content", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "jiang,2014", "name": "item", "description": "jiang,2014", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/jiang,2014"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "1975-09-01T00:00:00Z"}}, {"id": "jin,2014", "type": "Feature", "geometry": null, "properties": {"updated": "2026-06-26T16:39:02Z", "type": "Journal Article", "created": "2017-12-22", "description": "The effects of pH variation on ionic exchange and mechanical function were studied in the arterially perfused rat and rabbit septa. The pH and PCO2 of the control perfusate were 7.40 and 39 mmHg, respectively. In the rabbit septum a metabolic acidosis (pH equals 6.82, PCO2 equals 39 mmHg) caused a loss of 16% of control tension in 12 min. Na+ and K+ exchange were unaltered. A comparable respiratory acidosis (pH equals 6.81, PCO2 equals 159 mmHg) caused a 51% loss of tension in 2 min. Na+ exchange was unaltered but K+ efflux fell from 8.9 +/- 0.6 (mean +/- SE) to 4.9 +/- 0.3 mmol/kg dry wt per min (P less than 0.001, n equals 10). A net gain of K+ of 16.9 +/- 1.7 (n equals 14) mmol/kg dry wt occurred and was attributable to a delayed fall in K+ influx relative to efflux over 15 min. The net gain could not be mimicked by epinephrine administration or blocked by propranolol and was absent in the beating rat septum and the quiescent rabbit septum. These results suggest that the net uptake of K+, which appears to be dependent on a period of depolarization, and the changes of contractility are controlled by the H+ ion concentration at a cellular site whose exchange with the extracellular space is characterized by a considerable restriction of diffusion. Changes of contractility are not related to the net uptake of K+.
", "keywords": ["Male", "0301 basic medicine", "Epinephrine", "Myocardium", "Sodium", "Heart", "Hydrogen-Ion Concentration", "In Vitro Techniques", "Propranolol", "Rats", "Ion Exchange", "Perfusion", "03 medical and health sciences", "0302 clinical medicine", "Potassium", "Animals", "Acidosis", " Respiratory", "Rabbits", "Acidosis", "Alkalosis", " Respiratory"], "contacts": [{"organization": "PA Poole-Wilson, GA Langer,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/jin,2014"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/American%20Journal%20of%20Physiology-Legacy%20Content", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "jin,2014", "name": "item", "description": "jin,2014", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/jin,2014"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "1975-09-01T00:00:00Z"}}, {"id": "kaongaandbayliss-smith,2016", "type": "Feature", "geometry": null, "properties": {"updated": "2026-06-26T16:39:05Z", "type": "Journal Article", "created": "2017-12-22", "description": "Effects of sodium nitrate were compared with sodium chloride loading on transport of electrolytes by the nephron. Maximal levels of free water clearance/clomerular filtration rate (CH2O/GFR) averaged 8.4% with nitrate loading and 14.4% with saline loading. Since ethacrynic acid and chlorothiazide exert their major natriuretic effect in the distal nephron, the increment in Na ad Cl reabsorbed beyond the proximal tubule. The administration of these agents resulted in an increase in fractional sodium excretion (CNa/GFR) of 21.1%, urinary sodium excretion (UNaV) of 1,126 mueq/min, and urinary chloride excretion (UClV) of 848 mueq/min during nitrate loading compared with an increase in CNa/GFR of 37.6%, UNaV of 2,362 mueq/min, and UClV of 2,397 mueq/min during saline loading. The smaller diuretic-induced increment in Na and Cl excretion in the nitrate studies suggests, as do the hydrated studies, that less Cl and Na are reabsorbed in the distal nephron during nitrate than saline loading. At every level of UNaV, fractional bicarbonate reabsorption was higher, urine pH was lower, and urinary potassium excretion (UKV) was higher in the nitrate studies. Thus, compared with saline loading, sodium nitrate decreases chloride and sodium reabsorption in the distal nephron. The higher hydrogen and potassium secretion in the nitrate studies may be consequent to the decreased ability of the distal nephron to reabsorb chloride.
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", "keywords": ["0301 basic medicine", "0303 health sciences", "Nitrates", "Sodium", "Biological Transport", "Chlorothiazide", "Hydrogen-Ion Concentration", "Sodium Chloride", "Urine", "6. Clean water", "Diuresis", "3. Good health", "Bicarbonates", "Electrolytes", "03 medical and health sciences", "Dogs", "Ethacrynic Acid", "Kidney Tubules", "Chlorides", "Potassium", "Animals", "Glomerular Filtration Rate"], "contacts": [{"organization": "Marvin F. Levitt, T Kahn, J. P. Bosch, MH Goldstein,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/li,2016"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/American%20Journal%20of%20Physiology-Legacy%20Content", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "li,2016", "name": "item", "description": "li,2016", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/li,2016"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "1975-09-01T00:00:00Z"}}, {"id": "ma,2015", "type": "Feature", "geometry": null, "properties": {"updated": "2026-06-26T16:39:09Z", "type": "Journal Article", "created": "2017-12-22", "description": "It has been established that H+ secretion can be maintained in frog stomach in the absence of exogenous CO2 by using a nutrient bathing fluid containing 25 mM H2PO4 (pH approximately equal to 4.5) or by lowering the pH of a nonbuffered nutrient solution to about 3.0-3.6. Exogenous CO2 in the presence of these nutrient solutions uniformly caused a marked decrease in H+ secretion, PD, adn short-circuit current (Isc) and an increase in transmucosal resistance (R). Elevation of nutrient [k+] to 83 mM reduced R significantly but transiently without change in H+ when nutrient pH less than 5.0, whereas R returned to base line and H+ increased when nutrient pH greater than 5.0. Acidification of the nutrient medium in the presence of exogenous CO2 results in inhibition of the secretory pump, probably by decreasing intracellular pH, and also interferes with conductance at the nutrient membrane. Removal of exogenous CO2 from standard bicarbonate nutrient solution reduced by 50% the H+, PD, and Isc without change in R; K+-free nutrient solutions reverse these changes in Isc and PD but not in H+. The dropping PD and rising R induced by K+-free nutrient solutions in 5% CO2 - 95% O2 are returned toward normal by 100% O2. Our findings support an important role for exogenous CO2 in maintaining normal acid-base balance in frog mucosa by acting as an acidifying agent.
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