Research was conducted to observe the impact of Na+ ion on silicon (Si) and phosphorus(P) dissolved by Rs - 2 and Rs - 4 strains. The results indicated that NaCl condition could improve Si dissolved by Rs - 2 strains and Rs — 4 strains. When Rs - 4 strains were cultivated 72 hours, concentration of dissolution Si reached 106.92 /ig/mL under 1.5% NaCl, and 148.9μg/mL by Rs - 2 strains under 3% NaCl. Then, NaCl condition could facilitate dissolution P capacity of Rs - 4 strains, after 72 h, concentration of dissolution P reached 115.68 μg/mL under 3 % NaCl. Furthermore , based on the changing with time, dissolution Si character of Rs - 2 strains accorded with Logistic curve type, and regression analysis showed that dissolved silicon and time was in positive correlation and had significant relationship. Followed dissolution P character of Rs - 4 strains accorded with binomial type, and had very significant relationship and high reliability.%考察了Na+对Rs-2和Rs-4两株土壤微生物溶硅溶磷的影响.结果表明:Na+可促进Rs-2、Rs-4菌株溶硅能力的增加.在1.5％ NaCl条件下,Rs-4菌的最大溶硅量为106.92μg/mL;在3％NaCl条件下,Rs-2菌株的最大溶硅量为148.9 μg/mL.而且Na+能够促进Rs-4菌株溶磷能力的增加,在3％NaCl条件下,Rs-4菌株的最大溶磷量为115.68 μg/mL,但Na+降低了Rs-2菌株的溶磷能力.Rs-2菌株溶硅量随时间的变化符合Logistic曲线类型,回归分析表明溶硅量与时间呈正相关且回归关系显著.Rs-4菌株溶磷量随时间的变化符合二项式类型,回归关系极显著且模型有很高的可信度.
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