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Ammonia and carbon dioxide emissions by stabilized conventional nitrogen fertilizers and controlled release in corn crop Ciência e Agrotecnologia
Souza,Taylor Lima de; Guelfi,Douglas Ramos; Silva,André Leite; Andrade,André Baldansi; Chagas,Wantuir Filipe Teixeira; Cancellier,Eduardo Lopes.
ABSTRACT The market of stabilized, slow and controlled release nitrogen (N) fertilizers represents 1% of the world fertilizer consumption. On the other hand, the increase in availability, innovation and application of these technologies could lead to the improvement of N use efficiency in agroecossystems and to the reduction of environmental impacts. The objective of this study was to quantify agronomic efficiency relative index, ammonia volatilization, and CO2 emissions from conventional, stabilized and controlled release N fertilizers in corn summer crop. The experiment was carried out in a corn crop area located in Lavras, state of Minas Gerais, Brazil, without irrigation. All treatments were applied in topdressing at rate of 150 kg ha-1 N. N-NH3 losses...
Tipo: Info:eu-repo/semantics/article Palavras-chave: CO2; NH3 loss; No-tillage; Zea mays L..
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000500494
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Ammonia volatilization from enhanced-efficiency urea on no-till maize in brazilian cerrado with improved soil fertility Ciência e Agrotecnologia
Cancellier,Eduardo Lopes; Silva,Douglas Ramos Guelfi; Faquin,Valdemar; Gonçalves,Bruno de Almeida; Cancellier,Leandro Lopes; Spehar,Carlos Roberto.
ABSTRACT High nitrogen losses by ammonia volatilization are expected when urea is used as the source of N. The use of controlled-release urea and urease inhibitors are possible strategies to reduce such losses and increase nitrogen use efficiency. This study aimed to evaluate nitrogen losses by ammonia volatilization from stabilized, slow and controlled release urea and its absorption by maize grown under no-till in an improved Cerrado soil. Four N sources were used: conventional urea, urea + N-(n-butyl) thiophosphoric triamide (NBPT), urea + Cu and B and urea coated by sulfur + polymers. These N sources were surface applied along the rows using three N doses of 100, 150 and 200 kg ha-1. No N was added to the control. Data were collected regarding N losses...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Nitrogen fertilizers; NH3-N losses; Polymer sulfur coated urea; Urease inhibitors; Zea mays L.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542016000200133
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