Data/hora: 13/06/2024 13:45:58

Provedor de dados: 	90	
País: 	Brazil	
Título: 	Loss of ammonia from nitrogen fertilizers applied to maize and soybean straw	
Autores: 	Faria,Letícia de Abreu; Nascimento,Carlos Antonio Costa do; Vitti,Godofredo Cesar; Luz,Pedro Henrique de Cerqueira; Guedes,Elaine Maria Silva.	
Data: 	2013-08-01	
Ano: 	2013	
Palavras-chave: 	Boric acid; Copper sulfate; Coated urea; Volatilization; Zeolite.	
Resumo: 	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.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000400014	
Editor: 	Sociedade Brasileira de Ciência do Solo	
Relação: 	10.1590/S0100-06832013000400014	
Formato: 	text/html	
Fonte: 	Revista Brasileira de Ciência do Solo  v.37 n.4 2013	
Fonte: 	info:eu-repo/semantics/openAccess