A form of increasing the efficiency of N fertilizer is by coating urea with polymers to reduce ammonia volatilization. The aim of this study was to evaluate the effect of polymer-coated urea on the control of ammonia volatilization, yield and nutritional characteristics of maize. The experiment was carried out during one maize growing cycle in 2009/10 on a Geric Ferralsol, inUberl\uffc3\uffa2ndia, MG, Brazil. Nitrogen fertilizers were applied as topdressing on the soil surface in the following urea treatments: polymer-coated urea at rates of 45, 67.5 and 90 kg ha-1 N and one control treatment (no N), in randomized blocks with four replications. Nitrogen application had a favorable effect on N concentrations in leaves and grains, Soil Plant Analysis Development (SPAD) chlorophyll meter readings and on grain yield, where as coated urea had no effect on the volatilization rates, SPAD readings and N leaf and grain concentration, nor on grain yield in comparison to conventional fertilization.
", "keywords": ["2. Zero hunger", "volatiliza\u00e7\u00e3o de am\u00f4nia", "Agriculture (General)", "N fertilizer", "polymer-coated urea", "leitura SPAD", "04 agricultural and veterinary sciences", "Zea mays", "nitrogen", "6. Clean water", "nitrog\u00eanio", "S1-972", "ammonia volatilization", "SPAD reading", "0401 agriculture", " forestry", " and fisheries", "fertilizante nitrogenado", "ureia revestida com pol\u00edmeros"]}, "links": [{"href": "https://doi.org/10.1590/s0100-06832014000400016"}, {"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/s0100-06832014000400016", "name": "item", "description": "10.1590/s0100-06832014000400016", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1590/s0100-06832014000400016"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2014-08-01T00:00:00Z"}}, {"id": "10.1590/s0100-06832013000400014", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-21T16:18:29Z", "type": "Journal Article", "created": "2013-09-25", "title": "Loss Of Ammonia From Nitrogen Fertilizers Applied To Maize And Soybean Straw", "description": "In Brazilian agriculture, urea is the most commonly used nitrogen (N) source, in spite of having the disadvantage of losing considerable amounts of N by ammonia-N volatilization. The objectives of this study were to evaluate: N lossby ammonia volatilization from: [urea coated with copper sulfate and boric acid], [urea coated with zeolite], [urea+ammonium sulfate], [urea coated with copper sulfate and boric acid+ammonium sulfate], [common urea] and [ammonium nitrate]; and the effect of these N source son the maize yield in terms of amount and quality. The treatments were applied to the surface of a soil under no-tillage maize, in two growing seasons. The first season (2009/2010) was after a maize crop (maize straw left on the soil surface) and the second cycle (2012/2011) after a soybean crop. Due to the weather conditions during the experiments, the volatilization of ammonia-N was highest in the first four days after application of the N sources. Of all urea sources, under volatilization-favorable conditions, the loss of ammonia from urea coated with copper sulfate and boric acid was lowest, while under high rainfall, the losses from the different urea sources was similar, i.e., an adequate rainfall was favorablet o reduce volatilization. The ammonia volatilization losses were greatest in the first four days after application. Maize grain yield differed due to N application and in the treatments, but this was only observed with cultivation of maize crop residues in 2009/2010. The combination of ammonium+urea coated with copper sulfate and boric acid optimized grain yield compared to the other urea treatments. The crude protein concentration in maize was not influenced by the technologies of urea coating.
", "keywords": ["2. Zero hunger", "copper sulfate", "Agriculture (General)", "volatiliza\u00e7\u00e3o", "ureia revestida", "04 agricultural and veterinary sciences", "6. Clean water", "S1-972", "\u00e1cido b\u00f3rico", "0401 agriculture", " forestry", " and fisheries", "coated urea", "zeolite", "volatilization", "boric acid", "sulfato de cobre", "ze\u00f3lita"]}, "links": [{"href": "https://doi.org/10.1590/s0100-06832013000400014"}, {"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/s0100-06832013000400014", "name": "item", "description": "10.1590/s0100-06832013000400014", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1590/s0100-06832013000400014"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2013-08-01T00:00:00Z"}}, {"id": "10.1590/s0100-204x2017000300007", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-21T16:18:30Z", "type": "Journal Article", "created": "2017-05-11", "title": "Additives Incorporated Into Urea To Reduce Nitrogen Losses After Application To The Soil", "description": "Abstract: The objective of this work was to develop urea-based fertilizers with internal incorporation of urease inhibitors and other additives in the granule. The effects of the incorporation of NBPT, copper (Cu+2), boric acid (H3BO3), elemental sulphur (S\uffc2\uffba), and a clay mineral from the zeolite group in powder urea - with ten different combinations of these additives - were evaluated as to N losses by volatilization and leaching. The losses in laboratory-developed formulations were compared with those of commercial fertilizers coated with the same additives (Super N, FH Nitro Mais, and FH Nitro Gold). The evaluations were made in greenhouse conditions, using a Ultisol accommodated in PVC columns. Nitrate and ammonium leaching was evaluated in the solution percolated through the soil columns. Ammonia volatilization was measured with a semi-open static chamber. The incorporation of urease inhibitors (NBPT, H3BO3, and Cu+2) into the urea granules was efficient to reduce N volatilization. Ammonia volatilization in the laboratory-developed ureas was lower than in commercial fertilizers coated with the same additives, while ammonium sulfate losses by leaching were similar. The addition of zeolite does not reduce N volatilization. Mineral N leaching in the soil profile is not affected by urease inhibitors.
", "keywords": ["volatiliza\u00e7\u00e3o de am\u00f4nia", "Agriculture (General)", "urease inhibitors", "04 agricultural and veterinary sciences", "lixivia\u00e7\u00e3o", "01 natural sciences", "inibidores de urease", "6. Clean water", "S1-972", "leaching", "nitrogen fertilizers", "ammonia volatilization", "NBPT", "0401 agriculture", " forestry", " and fisheries", "fertilizantes nitrogenados", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.1590/s0100-204x2017000300007"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Pesquisa%20Agropecu%C3%A1ria%20Brasileira", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1590/s0100-204x2017000300007", "name": "item", "description": "10.1590/s0100-204x2017000300007", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1590/s0100-204x2017000300007"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2017-03-01T00:00:00Z"}}, {"id": "10.1590/s0103-84782011001200003", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-21T16:18:30Z", "type": "Journal Article", "created": "2011-12-10", "title": "Alternative Sources Of Supply In The Urea Nitrogen For Rice Production", "description": "A ureia \uffc3\uffa9 a principal fonte de N usada na agricultura, mas apresenta grandes perdas em arroz irrigado por alagamento. O objetivo deste trabalho foi avaliar a efici\uffc3\uffaancia de fontes de N alternativas \uffc3\uffa0 ureia para utiliza\uffc3\uffa7\uffc3\uffa3o pelo arroz irrigado aplicadas em diferentes est\uffc3\uffa1dios de desenvolvimento da planta atrav\uffc3\uffa9s da quantifica\uffc3\uffa7\uffc3\uffa3o da volatiliza\uffc3\uffa7\uffc3\uffa3o de N-NH3 e de par\uffc3\uffa2metros agron\uffc3\uffb4micos. O experimento foi realizado em campo nos anos agr\uffc3\uffadcolas 2007/08 e 2008/09. O delineamento experimental foi de blocos ao acaso com quatro repeti\uffc3\uffa7\uffc3\uffb5es. Os tratamentos foram compostos de diferentes fontes de N aplicados na semeadura, no perfilhamento e no est\uffc3\uffa1dio de diferencia\uffc3\uffa7\uffc3\uffa3o floral: testemunha sem aplica\uffc3\uffa7\uffc3\uffa3o de N, ureia, ureia+inibidor de urease, duas fontes de N l\uffc3\uffadquido (N-28 e N- 30), sulfato de am\uffc3\uffb4nio e ureia + enxofre. Nas duas safras, a volatiliza\uffc3\uffa7\uffc3\uffa3o de N-NH3 na semeadura foi praticamente insignificante, enquanto no est\uffc3\uffa1dio V4 a fonte que menos volatilizou foi o sulfato de am\uffc3\uffb4nio. A resposta em produtividade variou entre os anos, provavelmente em fun\uffc3\uffa7\uffc3\uffa3o da disponibilidade de N no solo e aspectos clim\uffc3\uffa1ticos. Quando vantajoso economicamente, o uso do inibidor de urease e o sulfato de am\uffc3\uffb4nio proporcionam produtividades semelhantes \uffc3\uffa0 fonte ureia.
", "keywords": ["fertilizer fluids", "sulfato de am\u00f4nio", "inibidor de urease", "fertilizantes fluidos", "ammonium sulfate", "volatiliza\u00e7\u00e3o", "0401 agriculture", " forestry", " and fisheries", "04 agricultural and veterinary sciences", "volatilization", "urease inhibitor"]}, "links": [{"href": "https://doi.org/10.1590/s0103-84782011001200003"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Ci%C3%AAncia%20Rural", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1590/s0103-84782011001200003", "name": "item", "description": "10.1590/s0103-84782011001200003", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1590/s0103-84782011001200003"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2011-12-01T00:00:00Z"}}], "links": [{"rel": "self", "type": "application/geo+json", "title": "This document as GeoJSON", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=volatiliza%C3%A7%C3%A3o&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=volatiliza%C3%A7%C3%A3o&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=volatiliza%C3%A7%C3%A3o&", "hreflang": "en-US"}, {"rel": "last", "type": "application/geo+json", "title": "items (last)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=volatiliza%C3%A7%C3%A3o&offset=4", "hreflang": "en-US"}], "numberMatched": 4, "numberReturned": 4, "distributedFeatures": [], "timeStamp": "2026-09-22T03:02:02.580541Z"}