| Sixteen phosphate-solubilizing micro-organisms were separated from high calcium soil in Hexi corridor in Gansu Province by abio-phosphor solid culture medium,and their ability of dissolving phosphorus was measured.The ratio of D/d(ratio of diameter of phosphorus-dissolving circle to diameter of bacteria community) varied from 1.24 to 5.4,and available quantity of dissolving phosphorus changed from 7.6 mg/L to 356.24 mg/L,which showed those phosphate-solubilizing micro-organisms had ability of dissolving phosphors.In condition of liquid cultivate,P3-16 and P3-28 had higher available quantity of dissolving phosphors than other phosphate-solubilizing micro-organisms,and the ratio of dissolving phosphorus reached 7.22% and 6.67% respectively.High quality strains would be offered to further study fertilizer with P bacteria using in high Ca soil. |