MIXTURES OF PHOSPHORUS SOURCES OF DIFFERENT SOLUBILITIES AND THE EFFICIENCY OF USE BY CORN IN INTERCROPPING WITH COVER CROPS

Tropical soils have chemical characteristics that promote a fixation of the P element, making phosphate fertilizers in these low efficiency. The present work aimed to evaluate efficiency fertilization corn crop different systems, sources and mixture between sources. It was adopted completely randomized design with subdivided plots. plots were formed by three treatments (system cultivation corn): single corn, intercropped Crotalaria juncea, pigeon pea (Cajanus cajan). subplots five treatments, created two mixtures them. consortium crotalaria species reduced productivity regardless source or mix used. In cultivation, greater use is made applied fertilizer, which means can be tool for improving levels Brazilian agriculture.