COVERING HERBICIDE AND POTASSIUM SUBDOSES UNDER CROP-LIVESTOCK INTEGRATION SYSTEM

• Autor(a) principal: Oliveira Júnior, Paulo Roberto
• Data de Publicação: 2010
• Outros Autores: Gualberto, Ronan, Oliveira, Paulo Sérgio Rabello, Costa, Nídia Raquel, Montans, Flávia Minotto
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Pesquisa Agropecuária Tropical (Online)
• Texto Completo: https://revistas.ufg.br/pat/article/view/4717
• topic: Brachiaria brizantha; Glycine max; herbicides; intercropping; haloxyfop-methyl; Brachiaria brizantha; Glycine Max; herbicidas; consorciação; haloxyfop-methyl

The objective of this study was to evaluate soybean and Brachiaria forage yields, under a crop-livestock integration system, in terms of increasing covering herbicide and potassium rates. The experiment was carried out in a randomized complete blocks design, in a split-split-plot scheme, with three replications. The treatments were: cultivars (CD 216 and VMax), for plots; herbicide rates (0 g ha-1, 0.24 g ha-1; and 0.96 g ha-1 of haloxyfop-methyl), for split-plots; and potassium doses (30 kg ha-1 and 60 kg ha-1 of K2O), for split-split-plots. VMax presented the highest number of pods per plant, while CD 216 presented the largest number of grains per pods. There was interaction among cultivars and herbicide doses, concerning the one hundred grains mass. For the split-plot, in comparison with VMax, CD 216 showed a higher one hundred grains mass rate. There were no significant levels of herbicide and K for soybean yield under crop-livestock integration. However, the highest CD 216 and VMax yield rates were obtained at 0 g i.a. ha-1 and 0.96 g i.a. ha-1 of the herbicide and 60 kg ha-1 and 30 kg ha-1 of K2O. The K doses which resulted in a higher dry biomass yield rate for Brachiaria brizantha were 30 kg ha-1 of K2O, in consortium with the CD 216 cultivar, and 60 kg ha-1 of K2O, in consortium with VMax. KEY-WORDS: Brachiaria brizantha; Glycine max; herbicides; intercropping; haloxyfop-methyl.