Breeding of P-decomposing strain and exploration for its fermentation condition
PS28P which could produce 257.24 mg·L~(-1) P in shaking Flask was obtained from PS-01P through ultraviolet irradiation, and its phosphate decomposing capacity was 281.95% higher than that of starting strain. The factors including carbon sources, nitrogen sources, culture temperature were studied and the results indicated that the optimum condition for fermentation is 0.5% maize powder, 3.5% bean powder, 0.3% fish meal and 50/250 mL medium volume at 35℃ for 40h. Under this condition, bacteria number reachs 2.35×10~(9) mL~(-1).