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分析了氧化硫硫杆菌的产酸力及其对黄绵土中Ｐ、Ｚｎ、Ｍｎ养分的活化作用。结果表明，氧化硫硫杆菌可使环境ｐＨ值降低１～３个单位；接种于黄绵土后可显著增加土壤中Ｃａ２－Ｐ、Ｃａ８－Ｐ、Ａｌ－Ｐ的含量，土壤中有效Ｚｎ、Ｍｎ含量也明显提高。ｔ检验均达显著或极显著水平；田间试验表现显著的增产效果。
The acidogenicity of Thiobacillus thiooxidans and the activation of P, Zn and Mn in loessial soil were analyzed. The results showed that Thiobacillus thiooxidans could reduce the pH value of the environment by 1 ~ 3 units. The inoculation of P. xanthomonas into soil increased significantly the contents of Ca2-P, Ca8-P and Al-P in soils, and the contents of available Zn and Mn in soils Significantly improved. t test reached significant or very significant level; field trials showed significant yield increase.