Épocas de aplicação de nitrogênio em feijoeiro cultivado após milho solteiro ou consorciado com braquiária

• Autor(a) principal: Soratto, Rogério Peres [UNESP]
• Data de Publicação: 2013
• Outros Autores: Fernandes, Adalton Mazetti [UNESP], Pilon, Cristiane, Crusciol, Carlos Alexandre Costa [UNESP], Borghi, Emerson
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1590/S0100-204X2013001000006; http://hdl.handle.net/11449/110140
• topic: Brachiaria brizantha; Phaseolus vulgaris; adubação nitrogenada; antecipação; sistema plantio direto; Brachiaria brizantha; Phaseolus vulgaris; nitrogen fertilization; early application; no-tillage system

The objective of this work was to evaluate the common bean response to N application timing, under no-tillage system, after single corn or intercropped with palisade grass. A randomized complete block experimental design was used in a split-plot arrangement, with four replicates. Plots consisted of: single corn crop or corn intercropped with palisade grass, in two summer cropping seasons precedent to common bean sowing. Subplots consisted of: 100 kg ha-1 N application in three times - before sowing, at sowing, and at side-dressing - and a control treatment without N application. Nitrogen fertilization on common bean increased leaf-N content, the number of pods per plant, and grain yield (33% in the average application timing), only in the cropping after single corn. By providing large mass production and by N cycling, the cultivation of palisade grass intercropped with corn reduced N requirement of common bean in succession, in comparison to previous sole corn cultivation. Early N application before or during common bean sowing time provides grain yield similar to the observed one in the side-dressing application.