Phosphorus fractions and microbiological indicators in vineyards soils of a tropical semiarid setting in Brazil

Brazilian semi-arid tropical is responsible for the production and export of fine table grapes, but demand phosphate fertilizers other agricultural inputs increases cost threatens local water bodies by leaching phosphorus (P). The objectives this study were to quantify organic inorganic fractions P determine chemical microbiological attributes related its mineralization in soils cultivated with vines São Francisco Valley. It was hypothesized that microbial activity would increase areas fertilized phosphate. Soil samples from collected fallow systems. fractionation, macro-elements analysis, biomass (Pmic), phosphatase enzyme determined correlated each total proportion synthesized glomalin. In both treatments, exceeded ones, available those associated most recalcitrant fractions, reducing risks element contamination bodies. Pmic higher winery due presence matter, hence alkaline enzymes glomalin increased respectively three four evaluated areas, indicating P-mineralized bacteria arbuscular mycorrhizal fungi have been positively affected current system.