Coberturas vegetais e adubação fosfatada no feijoeiro de inverno em sistema plantio direto

Abstract

The survey was conducted during the winter of 2010 and 2011 in Selvíria, Mato Grosso do Sul State, Brazil. The experimental design was a randomized block in a split plot with four replications. The plots consisted of: millet, sun hemp, pea, velvet bean, millet + pigeon pea, millet and millet + Crotalaria and Mucuna fallow. The subplots were represented by the absence of phosphate fertilizers and doses of P2O5 (60, 90 and 120 kg ha-1) in the form of monoammonium phosphate (MAP). Were evaluated: plant cover, dry matter of plants, components production, total P in shoots and productivity. It was concluded that Crotalaria juncea, the consortium millet + black velvet bean (Mucuna aterrima) and millet + Crotalaria juncea, produced sufficient amount of dry matter to make possible the no-tillage system and the use of straw Crotalaria juncea, millet + Crotalaria juncea and millet + velvet bean as cover crops provided better development and production of bean winter saving the application of phosphorus in no-tillage system.