Adubação nitrogenada em soja na implantação do sistema plantio direto

• Autor(a) principal: Aratani, Ricardo Garcia [UNESP]
• Data de Publicação: 2008
• Outros Autores: Lazarini, Edson [UNESP], Marques, Rubia Renata [UNESP], Backes, Clarice [UNESP]
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://www.seer.ufu.br/index.php/biosciencejournal/article/view/6755; http://hdl.handle.net/11449/10281
• topic: Glycine max; Brachiaria decumbens; Pennisetum americanum; Nitrogen; Urea; Direct seeding

The vegetal residues maintenance on soil surface, characteristic of no-tillage system have changing the nutrients availability. So, in this sense, the aim of this work was to evaluate the effect of times of N application on corn sowed in no tillage system under vegetable residues of different species used for soil covering and straw supply in the cerrado area. The experiment was carried out in field conditions, in an Oxisol characteristic of this area. The treatments were constituted by the combination of different times of N application: (43+23+20+00); (00+70+20+00); (00+00+90+00); (00+00+20+70); (00+00+00+90) with an control treatment (absence of nitrogen), in kg ha(-1), respectively 30 days before the desiccation, at desiccation, at sowing and at sidedress of corn, sowed directly on Penisetum americanum and Brachiaria decumbens residues. By the results it can be concluded that nitrogen application in soybean, independent of time, does not increase productivity in relation to the treatment without nitrogen application.