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Tipo: | Artigo |
Título: | Rates of urea with or without urease inhibitor for topdressing wheat |
Autor(es): | Rocha, Valterley Soares Espindula, Marcelo Curitiba Souza, Moacil Alves de Campanharo, Marcela Paula, Guilherme de Sousa |
Abstract: | 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®) 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. |
Palavras-chave: | Triticum aestivum Nitrogen fertilization NH3 volatilization NBPT N-(n-butyl)thiophosphoric triamide |
Editor: | Chilean Journal of Agricultural Research |
Tipo de Acesso: | Open Access |
URI: | http://dx.doi.org/10.4067/S0718-58392013000200012 http://www.locus.ufv.br/handle/123456789/17682 |
Data do documento: | 3-Fev-2013 |
Aparece nas coleções: | Fitotecnia - Artigos |
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