Phosphate fertilizer plant coverages and on the bean “winter” in no- tillage system

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.