Nitrogen efficiency in oats on grain yield with stability

Revista Brasileira de Engenharia Agricola e Ambiental

Pretto, Rafael¹  Fernandes, Sandra B. V.¹  Goi Neto, Constantino J.¹  Mantai, Rubia D.¹  Scremin, Osmar B.¹  Silva, José A. G. da¹ 

[1] Universidade Regional do Noroeste do Estado do Rio Grande do Sul, Ijuí, Brazil

关键词: Avena Sativa;    C/N;    predictability;    biometric models;    optimization.;   

DOI  :  10.1590/1807-1929/agriambi.v20n12p1095-1100

学科分类：农业科学（综合）

来源: Universidade Federal de Campina Grande * Centro de Ciencias e Tecnologia

【 摘 要 】

Nitrogen (N) is the nutrient most absorbed by the oat crop. Unfavorable climate conditions decrease its efficiency, generating instability and reduction in yield. The objective of this study was to improve N use efficiency in oat grain yield by the economic value of the product and of the input and by models that scale the stability, considering systems of succession of high and reduced residual-N release in favorable and unfavorable years for cultivation. The study was conducted in the years 2013, 2014 and 2015 in two systems of succession (soybean/oat, maize/oat) in randomized blocks with eight replicates, using the N-fertilizer doses of 0, 30, 60 and 120 kg ha-1. The N-fertilizer dose for maximum economic efficiency in oats should be considered based on the meteorological trends of the cultivation year. N use optimization by models that determine the stability is an innovative proposal to increase fertilization efficiency on the yield. The N-fertilizer dose of 60 kg ha-1 promotes greater efficiency with predictability and yield, regardless of the agricultural year and the system of succession.

【 授权许可】

CC BY