ABSTRACT Nitrogen (N) is one of the nutrients that have the most significant effect on corn grain productivity increase. In order to evaluate the effect of sources of N topdressing and doses in the grown corn culture, in a conventional till system, it was installed an experiment in the city of Uruta\uffc3\uffad, Goi\uffc3\uffa1s, in the 2012/13 crop, in clayey textured Red Latosol. The experimental design was a randomized complete block design with four replications, with the treatments arranged in a factorial 3 x 5, consisting of three sources (coated urea, urea and ammonium sulfate) and five doses (0, 60, 120, 180 and 240 kg ha-1) of N, topdressing, applied in the surface and in a single dose, when the corn plants were in V4 stage. The hybrid used was the P3646H. We evaluated the following characters: stem diameter, plant height, height of ear insertion, leaf N, number of ears per plant, ear length, number of rows per ear, number of grains per row, 100 grains mass and grain productivity. All characters have a response to nitrogen fertilization and only the height of ear insertion showed no significant difference between sources. The source coated urea showed the best results, indicating that its use may be compensatory, especially in favorable conditions for the NH3 volatilization, as the application of high doses of N in the surface.
", "keywords": ["0106 biological sciences", "Coated urea", "Aduba\u00e7\u00e3o nitrogenada", "S", "QH301-705.5", "Ureia", "Agriculture", "Sulfato de am\u00f4nio", "04 agricultural and veterinary sciences", "Aduba\u00e7\u00e3o nitrogenada. Sulfato de am\u00f4nio. Ureia. Ureia revestida. Zea mays L..", "01 natural sciences", "Nitrogen fertilization", "Zea mays L.", "Urea", "0401 agriculture", " forestry", " and fisheries", "Nitrogen fertilization. Ammonium sulfate. Urea. Coated urea. Zea mays L..", "Ammonium sulfate", "Biology (General)", "Ureia revestida"]}, "links": [{"href": "https://periodicos.ufersa.edu.br/caatinga/article/view/4377/pdf"}, {"href": "https://doi.org/10.1590/1983-21252016v29n405rc"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Revista%20Caatinga", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1590/1983-21252016v29n405rc", "name": "item", "description": "10.1590/1983-21252016v29n405rc", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1590/1983-21252016v29n405rc"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2016-12-01T00:00:00Z"}}, {"id": "10.1590/01000683rbcs20150132", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-21T16:18:28Z", "type": "Journal Article", "created": "2016-02-03", "title": "Management Of Irrigation And Nitrogen Fertilizers To Reduce Amonia Volatilization", "description": "ABSTRACT Nitrogen losses by ammonia (NH3) volatilization can be reduced by appropriate irrigation management or by alternative N sources, replacing urea. The objective of this study was to evaluate the efficiency of irrigation management and N source combinations in decreasing NH3 volatilization from an Argissolo Vermelho Distr\uffc3\uffb3fico t\uffc3\uffadpico cultivated for 28 years with black oat (Avena strigosa) and maize (Zea mays), under no-tillage in the region of Depress\uffc3\uffa3o Central, Rio Grande do Sul, Brazil. The experiment was arranged in a randomized block design with split plots with three replications, where the main plots consisted of irrigation systems: no irrigation; irrigation immediately before and irrigation immediately after fertilization. The subplots were treated with different N sources: urea, urea with urease inhibitor and slow-release fertilizer, at an N rate of 180 kg ha-1, broadcast over maize, plus a control treatment without N fertilization. Ammonia volatilization was assessed using semi-open static collectors for 1, 2, 4, 6, and 10 days after N fertilization. In general, more than 90 % of total NH3-N losses occurred until three days after N fertilization, with peaks up to 15.4 kg ha-1 d-1. The irrigation was efficient to reduce NH3 losses only when applied after N fertilization. However, reductions varied according to the N fertilizer, and were higher for urea (67 %) and slightly lower for urea with urease inhibitor (50 %) and slow-release fertilizer (40 %), compared with the mean of the treatments without irrigation and irrigation before fertilization. The use of urea with urease inhibitor instead of urea was only promising under volatilization-favorable conditions (no irrigation or irrigation before N fertilization). Compared to urea, slow-release fertilizer did not reduce ammonia volatilization in any of the rainfed or irrigated treatments.
", "keywords": ["2. Zero hunger", "fontes de nitrog\u00eanio", "Aduba\u00e7\u00e3o", "Agriculture (General)", "aduba\u00e7\u00e3o nitrogenada", "04 agricultural and veterinary sciences", "Fertilizante nitrogenado", "Fertilidade do solo", "N fertilization", "6. Clean water", "S1-972", "nitrogen sources", "Am\u00f4nia", "perdas de N", "Nitrogen sources", "0401 agriculture", " forestry", " and fisheries", "Irriga\u00e7\u00e3o", "N losses"]}, "links": [{"href": "https://doi.org/10.1590/01000683rbcs20150132"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Revista%20Brasileira%20de%20Ci%C3%AAncia%20do%20Solo", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1590/01000683rbcs20150132", "name": "item", "description": "10.1590/01000683rbcs20150132", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1590/01000683rbcs20150132"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2015-12-01T00:00:00Z"}}, {"id": "10.1590/s0100-06832009000600017", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-21T16:18:29Z", "type": "Journal Article", "created": "2010-02-11", "title": "Ammonia Volatilization Of Urea In The Out-Of-Season Corn", "description": "The aim of this study was to evaluate the N losses due to volatilization at different rates of common urea, polymer coated urea and urease inhibitor-treated urea in the out-of-season corn, using semi-open static collectors. The treatments consisted of N levels on side-dressing fertilization with urea in different treatments: (a) control (without N), (b) urea 40 kg ha-1 N, (c) urea 80 kg ha-1 N, (d) polymer coated urea 40 kg ha-1 N, (e) polymer coated urea 80 kg ha-1 N and (f) urea with the urease inhibitor (UI) N 80 kg ha-1 N. The results showed that the treatments with polymer coated urea and with urease inhibitor-treated urea reduced the volatilization of N around 50 % compared to common urea, either in the first and the second N side-dressing fertilizations. Thus, they demonstrate that the polymer coat and the urease inhibitors were effective in reducing the volatilization of urea N applied in coverage, which resulted in higher productivity. There was also increasing urease activity in the treatments with application of common urea.
", "keywords": ["libera\u00e7\u00e3o lenta", "slow release", "0401 agriculture", " forestry", " and fisheries", "aduba\u00e7\u00e3o nitrogenada", "nitrogen fertilization", "04 agricultural and veterinary sciences", "nitrogen", "nitrog\u00eanio"], "contacts": [{"organization": "Pereira, Hamilton Seron, Le\u00e3o, Anabelisa Ferreira, Verginassi, Adriana, Carneiro, Marco Aur\u00e9lio Carbone,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1590/s0100-06832009000600017"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Revista%20Brasileira%20de%20Ci%C3%AAncia%20do%20Solo", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1590/s0100-06832009000600017", "name": "item", "description": "10.1590/s0100-06832009000600017", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1590/s0100-06832009000600017"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2009-12-01T00:00:00Z"}}, {"id": "10.1590/s0100-06832010000500020", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-21T16:18:29Z", "type": "Journal Article", "created": "2010-12-20", "title": "Ammonia Volatilization In No-Till System In The South-Central Region Of The State Of Parana, Brazil", "description": "Ammonia (NH3) volatilization can reduce the efficiency of urea applied to the surface of no-till (NT) soils. Thus, the objectives of this study were to evaluate the magnitude of NH3 losses from surface-applied urea and to determine if this loss justifies the urea incorporation in soil or its substitution for other N sources under the subtropical climatic conditions of South-Central region of Paran\uffc3\uffa1 State, Brazil. The experiment, performed over four harvesting seasons in a clayey Hapludox followed a randomized block design with four replicates. A single dose of N (150 kg ha-1) to V5 growth stage of corn cultivated under NT system was applied and seven treatments were evaluated, including surface-applied urea, ammonium sulfate, ammonium nitrate, urea with urease inhibitor, controlled-release N source, a liquid N source, incorporated urea, and a control treatment with no N application. Ammonia volatilization was evaluated for 20 days after N application using a semi-open static system. The average cumulative NH3 loss due to the superficial application of urea was low (12.5 % of the applied N) compared to the losses observed in warmer regions of Southeastern Brazil (greater than 50 %). The greatest NH3 losses were observed in dry years (up to 25.4 % of the applied N), and losses decreased exponentially as the amount of rainfall after N application increased. Incorporated urea and alternative N sources, with the exception of controlled-release N source, decreased NH3 volatilization in comparison with surface-applied urea. Urea incorporation is advantageous for the reduction of NH3 volatilization; however, other aspects as its low operating efficiency should be considered before this practice is adopted. In the South-Central region of Paran\uffc3\uffa1, the low NH3 losses from the surface-applied urea in NT system due to wet springs and mild temperatures do not justify its replacement for other N sources.
", "keywords": ["urease", "ureia", "Corn", "Aduba\u00e7\u00e3o nitrogenada", "Manejo do solo", "Ureia", "aduba\u00e7\u00e3o nitrogenada", "urea", "04 agricultural and veterinary sciences", "Plantio direto", "Nitrogen fertilizer", "Urease", "milho", "corn", "Milho", "Urea", "0401 agriculture", " forestry", " and fisheries", "Paran\u00e1", "nitrogen fertilizer"], "contacts": [{"organization": "Fontoura, Sandra Mara Vieira, Bayer, Cim\u00e9lio,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1590/s0100-06832010000500020"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Revista%20Brasileira%20de%20Ci%C3%AAncia%20do%20Solo", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1590/s0100-06832010000500020", "name": "item", "description": "10.1590/s0100-06832010000500020", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1590/s0100-06832010000500020"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2010-10-01T00:00:00Z"}}, {"id": "10.1590/s0100-06832014000500017", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-21T16:18:29Z", "type": "Journal Article", "created": "2014-11-05", "title": "Ammonia Volatilization From Nitrogen Fertilizers In No-Till Wheat And Maize In Southern Brazil", "description": "Crop residues on the soil surface of no-till systems can intensify ammonia volatilization from N fertilizers applied to cereal crops. This study assessed the magnitude of N losses through ammonia volatilization from urea applied to no-till winter (wheat) and summer crops (maize) on a Typic Hapludox in the south-central region of Paran\uffc3\uffa1, southern Brazil. In addition, the potential of alternative N sources (urea with urease inhibitor, liquid fertilizer, ammonium nitrate and ammonium sulfate) and different urea managements (fertilizer applied in the morning or afternoon) were evaluated. Two experiments with maize and wheat were carried out for two years, arranged in a randomized block design with four replications. Nitrogen volatilization losses were assessed with a semi-open static collector until 21 days after fertilization. In winter, the losses were low (<5.5 % of applied N) for all N sources, which were not distinguishable, due to the low temperatures. In the summer, volatilization rates from urea were higher than in the winter, but did not exceed 15 % of applied N. The main factor decreasing N losses in the summer was the occurrence of rainfall in the first five days after fertilization. Urea with urease inhibitor, nitrate and ammonium sulfate were efficient to decrease ammonia volatilization in maize, whereas the application time (morning or afternoon) had no influence.
", "keywords": ["2. Zero hunger", "Yield", "Aduba\u00e7\u00e3o nitrogenada", "Agriculture (General)", "rendimento", "Trigo", "Brasil", " Regi\u00e3o Sul", "aduba\u00e7\u00e3o nitrogenada", "nitrogen fertilization", "Efficiency", "04 agricultural and veterinary sciences", "Plantio direto", "yield", "efici\u00eancia", "6. Clean water", "S1-972", "Milho", "Nitrogen fertilization", "efficiency", "0401 agriculture", " forestry", " and fisheries"], "contacts": [{"organization": "Viero, Fernando, Bayer, Cim\u00e9lio, Fontoura, Sandra Mara Vieira, Moraes, Renato Paulo de,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1590/s0100-06832014000500017"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Revista%20Brasileira%20de%20Ci%C3%AAncia%20do%20Solo", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1590/s0100-06832014000500017", "name": "item", "description": "10.1590/s0100-06832014000500017", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1590/s0100-06832014000500017"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2014-10-01T00:00:00Z"}}], "links": [{"rel": "self", "type": "application/geo+json", "title": "This document as GeoJSON", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=Aduba%C3%A7%C3%A3o+nitrogenada&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=Aduba%C3%A7%C3%A3o+nitrogenada&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=Aduba%C3%A7%C3%A3o+nitrogenada&", "hreflang": "en-US"}, {"rel": "last", "type": "application/geo+json", "title": "items (last)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=Aduba%C3%A7%C3%A3o+nitrogenada&offset=5", "hreflang": "en-US"}], "numberMatched": 5, "numberReturned": 5, "distributedFeatures": [], "timeStamp": "2026-09-22T06:58:59.938557Z"}