Rates of urea with or without urease inhibitor for topdressing wheat

被引：13
作者：
Espindula, Marcelo Curitiba [1 ]
Rocha, Valterley Soares [2 ]
de Souza, Moacil Alves [2 ]
Campanharo, Marcela [3 ]
Paula, Guilherme de Sousa [2 ]
机构：
[1] Embrapa Rondonia, Empresa Brasileira Pesquisa Agropecuaria, BR-76815800 Porto Velho, Rondonia, Brazil
[2] Univ Fed Vicosa, Dept Fitotecn, BR-36570000 Vicosa, MG, Brazil
[3] Fac Integradas Aparicio Carvalho, BR-78912640 Porto Velho, Rondonia, Brazil
来源：
CHILEAN JOURNAL OF AGRICULTURAL RESEARCH | 2013年 / 73卷 / 02期
关键词：
Triticum aestivum; nitrogen fertilization; NH3; volatilization; NBPT; N-(n-butyl)thiophosphoric triamide;
D O I：
10.4067/S0718-58392013000200012
中图分类号：
S [农业科学];
学科分类号：
09 ;
摘要：
The urease inhibitor NBPT(N-(n-butyl) thiophosphoric triamide) is a management alternative to increase urea efficiency in topdressing because it reduces NH3 volatilization. The objective of this study was to evaluate N recovery and yield performance of wheat (Triticum aestivum L.) 'BRS 254' fertilized with different urea or urea + NBPT rates in topdressing. The experiment was conducted from May to September 2007 in Vicosa, Minas Gerais, Brazil. Treatments followed a 5 x 2 + 1 factorial design consisting of five N fertilizer rates (30, 60, 90, 120, and 150 kg ha(-1)) as urea or urea + NBPT (Agrotain (R)) applied as topdressing and a control without N. The experiment was a randomized complete block design with four replicates. Adding NBPT to urea resulted in better N utilization by wheat plants. The 100 kg N ha(-1) topdressing rate provided the best apparent N recovery by wheat plants, whereas 90 kg ha(-1) provided the best N use efficiency.
引用
收藏
页码：160 / 167
页数：8
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