Fungal rock phosphate solubilization using sugarcane bagasse

摘要: The effects of different doses rock phosphate (RP), sucrose, and (NH4)2SO4 on the solubilization RP from Araxa Catalao (Brazil) by Aspergillus niger, Penicillium canescens, Eupenicillium ludwigii, islandicum were evaluated in a solid-state fermentation (SSF) system with sugarcane bagasse. factors combined following 23 + 1 factorial design to determine their optimum concentrations. fitted response surfaces showed that higher promoted phosphorus (P) solubilization. addition sucrose did not have P most treatments due presence soluble sugars Except for A. all fungi required high achieve highest level Inversely, was inhibitory niger. Among tested, niger stood out, showing capacity requiring or supplementation. An additional experiment content can be increased adding medium. However, yield decreases increasing doses. In this experiment, maximal (approximately 60 %) achieved lower dose (3 g L−1). Our results show SSF used obtain low cost biofertilizer rich combining RP, bagasse, Moreover, bagasse is suitable substrate aiming at solubilization, since residue supply C N necessary metabolism within range favors