Black carbon (BC) is an important pool of the global C cycle, because it cycles much more slowly than others and may even be managed for C sequestration. Using stable isotope techniques, we investigated the fate of BC applied to a savanna Oxisol in Colombia at rates of 0, 11.6, 23.2 and 116.1\uffe2\uff80\uff83t\uffe2\uff80\uff83BC\uffe2\uff80\uff83ha\uffe2\uff88\uff921, as well as its effect on non\uffe2\uff80\uff90BC soil organic C. During the rainy seasons of 2005 and 2006, soil respiration was measured using soda lime traps, particulate and dissolved organic C (POC and DOC) moving by saturated flow was sampled continuously at 0.15 and 0.3\uffe2\uff80\uff83m, and soil was sampled to 2.0\uffe2\uff80\uff83m. Black C was found below the application depth of 0\uffe2\uff80\uff930.1\uffe2\uff80\uff83m in the 0.15\uffe2\uff80\uff930.3\uffe2\uff80\uff83m depth interval, with migration rates of 52.4\uffc2\uffb114.5, 51.8\uffc2\uffb118.5 and 378.7\uffc2\uffb1196.9\uffe2\uff80\uff83kg\uffe2\uff80\uff83C\uffe2\uff80\uff83ha\uffe2\uff88\uff921\uffe2\uff80\uff83yr\uffe2\uff88\uff921 (\uffc2\uffb1SE) where 11.6, 23.2 and 116.1\uffe2\uff80\uff83t\uffe2\uff80\uff83BC\uffe2\uff80\uff83ha\uffe2\uff88\uff921, respectively, had been applied. Over 2 years after application, 2.2% of BC applied at 23.2\uffe2\uff80\uff83t\uffe2\uff80\uff83BC\uffe2\uff80\uff83ha\uffe2\uff88\uff921 was lost by respiration, and an even smaller fraction of 1% was mobilized by percolating water. Carbon from BC moved to a greater extent as DOC than POC. The largest flux of BC from the field (20\uffe2\uff80\uff9353% of applied BC) was not accounted for by our measurements and is assumed to have occurred by surface runoff during intense rain events. Black C caused a 189% increase in aboveground biomass production measured 5 months after application (2.4\uffe2\uff80\uff934.5\uffe2\uff80\uff83t additional dry biomass\uffe2\uff80\uff83ha\uffe2\uff88\uff921 where BC was applied), and this resulted in greater amounts of non\uffe2\uff80\uff90BC being respired, leached and found in soil for the duration of the experiment. These increases can be quantitatively explained by estimates of greater belowground net primary productivity with BC addition.
", "keywords": ["2. Zero hunger", "leaching", "13. Climate action", "0401 agriculture", " forestry", " and fisheries", "04 agricultural and veterinary sciences", "ecology", "15. Life on land", "soil respiration", "respiraci\u00f3n del suelo", "01 natural sciences", "lixiviacion", "6. Clean water", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.1111/j.1365-2486.2009.02044.x"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Global%20Change%20Biology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1111/j.1365-2486.2009.02044.x", "name": "item", "description": "10.1111/j.1365-2486.2009.02044.x", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/j.1365-2486.2009.02044.x"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2010-02-22T00:00:00Z"}}, {"id": "10.5424/sjar/2008062-320", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-27T16:24:56Z", "type": "Journal Article", "created": "2013-11-21", "description": "The aim of this experiment was to evaluate the effects of adding DMPP (3,4-dimethylpyrazole phosphate) to urea on nitrate leaching and maize (Zea mays L.) yield over two growing seasons. Two nitrogen (N) levels (optimum and excessive) were applied to an irrigated maize crop under Mediterranean conditions. There were five treatments: optimal N (as urea) and the same dose plus DMPP; optimal N (as urea plus 40 kg N/ha) and the same N dose plus DMPP; and a control with no added N fertilizer. The maize was irrigated with an overhead mobile-line sprinkler system. EnviroSCAN probes were used to determine drainage and evapotranspiration and ceramic cups to obtain soil solution samples at a soil depth of 1.4 m. The use of DMPP with urea reduced nitrate leaching. No phytotoxic effects were observed due to the DMPP. There were no differences in grain yield between treatments with and without DMPP at the same rate of N. When DMPP was applied, sodium was displaced from the soil exchange complex due to increased NH4+ concentration, which also increased the electrical conductivity of soil in the drainage zone.
", "keywords": ["ZEA MAYS; APLICACION DE ABONOS; ABONOS NITROGENADOS; UREA; NITRATOS; LIXIVIACION; POLUCION DE AGUAS SUBTERRANEAS; INHIBIDORES DE LA NITRIFICACION; CONTROL DE LA CONTAMINACION; RENDIMIENTO DE CULTIVOS", "NITRIFICATION INHIBITORS", "INHIBIDORES DE LA NITRIFICACION", "NITROGEN FERTILIZERS", "CONTROL DE LA CONTAMINACION", "LEACHING", "POLLUTION CONTROL", "GROUNDWATER POLLUTION", "NITRATES", "Fertilizing", "RENDIMIENTO DE CULTIVOS", "CROP YIELD", "FERTILIZER APPLICATION", "APLICACION DE ABONOS", "ZEA MAYS", "ZEA MAYS; FERTILIZER APPLICATION; NITROGEN FERTILIZERS; UREA; NITRATES; LEACHING; GROUNDWATER POLLUTION; NITRIFICATION INHIBITORS; POLLUTION CONTROL; CROP YIELD", "POLUCION DE AGUAS SUBTERRANEAS", "2. Zero hunger", "ABONOS NITROGENADOS", "0402 animal and dairy science", "04 agricultural and veterinary sciences", "6. Clean water", "NITRATOS", "0401 agriculture", " forestry", " and fisheries", "LIXIVIACION", "UREA"], "contacts": [{"organization": "D\u00edez L\u00f3pez, J.A., Hernaiz, P.,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.5424/sjar/2008062-320"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Spanish%20Journal%20of%20Agricultural%20Research", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.5424/sjar/2008062-320", "name": "item", "description": "10.5424/sjar/2008062-320", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5424/sjar/2008062-320"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2008-06-01T00:00:00Z"}}], "links": [{"rel": "self", "type": "application/geo+json", "title": "This document as GeoJSON", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=lixiviacion&f=json", "hreflang": "en-US"}, {"rel": "alternate", "type": "text/html", "title": "This document as HTML", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=lixiviacion&f=html", "hreflang": "en-US"}, {"rel": "collection", "type": "application/json", "title": "Collection URL", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main", "hreflang": "en-US"}, {"type": "application/geo+json", "rel": "first", "title": "items (first)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=lixiviacion&", "hreflang": "en-US"}, {"rel": "last", "type": "application/geo+json", "title": "items (last)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=lixiviacion&offset=2", "hreflang": "en-US"}], "numberMatched": 2, "numberReturned": 2, "distributedFeatures": [], "timeStamp": "2026-07-28T00:53:02.699379Z"}