Urease inhibitor (NBPT) and efficiency of single or split application of urea in wheat crop

Revista Ceres

Marcelo Curitiba Espindula²  Valterley Soares Rocha¹  Moacil Alves De Souza¹  Marcela Campanharo¹  Adérico Júnior Badaró Pimentel¹ 

[1],Embrapa RondôniaPorto Velho Rondônia ,Brazil

关键词: Triticum aestivum L.;    nitrogen;    ammonia volatilization;    Triticum aestivum L.;    nitrogênio;    volatilização de amônia;   

DOI  :  10.1590/S0034-737X2014000200016

来源: SciELO

【 摘 要 】

NBPT (N-(n-butyl) thiophosphoric triamide), a urease inhibitor, has been reported as one of the most promising compounds to maximize urea nitrogen use in agricultural systems. The objective of this study was to evaluate the performance of irrigated wheat fertilized with urea or urea + NBPT as single or split application. The experiment was conducted from June to October 2006 in Viçosa, MG, Brazil. The experimental design followed a 2×2 factorial scheme, in which urea or urea + NBPT were combined with two modes of application: full dose at sowing (60kg ha-1) or split (20kg ha-1 at sowing + 40kg ha-1 as topdressing at tillering), in randomized blocks with ten replications. The split application of nitrogen fertilization does not improve the yield wheat under used conditions. The use of urease inhibitor improves the grain yield of wheat crop when urea is applied in topdressing at tillering, but its use does not promote difference when urea is applied in the furrow at planting.

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