Use este identificador para citar ou linkar para este item: http://repositorio.ufla.br/jspui/handle/1/42222
Título: Ammonia volatilization of urea in the out-of-season corn
Título(s) alternativo(s): Volatilização de amônia da ureia na cultura do milho safrinha
Palavras-chave: Nitrogen
Nitrogen fertilization
Slow release
Nitrogênio
Adubação nitrogenada
Liberação lenta
Data do documento: 2009
Editor: Sociedade Brasileira de Ciência do Solo
Citação: PEREIRA, H. S. et al. Ammonia volatilization of urea in the out-of-season corn. Revista Brasileira de Ciência do Solo, Viçosa, MG, v. 33, n. 6, 2009.
Resumo: 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.
URI: http://repositorio.ufla.br/jspui/handle/1/42222
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