两株解磷真菌的解磷能力及其解磷机理的初步研究

Solubilization Capacity of Insoluble Phosphates and it's Mechanism by Two Phosphate Solubilizing Fungi (PSF)

从不同处理的水稻土壤中分离筛选出两株高效解磷真菌HP2、P5,研究了不同碳源条件对溶磷效果的影响,以及解磷菌株在不同的碳源培养条件下,溶磷量与培养介质pH值之间的相关性。结果表明,HP2菌株解磷能力在不同的测定时间内均高于P5菌株;不同碳源培养基的溶磷量顺序为蔗糖>葡萄糖>纤维素,且彼此差异显著;测定时间内,菌株的溶磷量与介质pH值之间存在极显著相关性(P<0·01)。

Two phosphate solubihzing fungi （PSF） strains named HP2, P5 were isolated from different paddy soils, we studied the effects of different carbon sources on the solubilization of rock phosphate and the relationship between phosphate solubilization capacity and the pH of culture mediums supplied with different carbon sources. The results showed that, Strain HP2 had the better capacity to solubilize rock phosphate than P5 in different testing time; The rock phosphate solubilized by two PSF supplied with different carbon sources was sucrose 〉 glucose 〉 cellulose, and the relationship among each other was salience; in testing time, the correlation between phosphate solubilization capacity by two PSF and the pH of culture mediums supplied with different carbon sources was significant salience （P 〈 0. 01 ） .