Phosphorus (P) plays a role in energy transfer processes and chemical reactions in plant metabolism. Phosphorus is found in soils both in an organic form and a mineral form. Phosphorus availability in soils is limited by fixation processes, which include both its adsorption to mineral fraction and the precipitation reactions. In this work, the phosphate solubilization by native bacterial was evaluated in order to identify the most efficient bacterial, in three agro-ecosystems: sugarcane monoculture (CAÑ), grassland (PAST), and