The objective of this work was to evaluate the ability and efficiency of solubilization of CaHPO4, AlPO4 and Araxá apatite in solid medium, and AlPO4 and Araxá apatite in liquid medium. Soil P-solubilizing fungi (Aspergillus) and P-solubilizing bacteria (Enterobacteriaceae) were tested. In solid medium, all isolates solubilized CaHPO4, not any isolate solubilized Araxá apatite, and one fungus isolate (PSF 7) solubilized AlPO4. In liquid medium, all isolates solubilized AlPO4 and Araxá apatite. Screening of P-solubilizing microorganisms must be done by quantifying their potential of phosphate solubilization in liquid growth medium.
Aspergillus; Enterobacteria; phosphorus; growth media; apatite
