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本文研究了日光温室栽培蔬菜条件下土壤微生物和酶活性的变化，结果表明：日光温室土壤与露地旱田土壤相比，氨化细菌、硝化细菌和反硝化细菌的数量分别增加了1．07～2．28倍、50．47～68．79倍和4．33～9．32倍；真菌表现为腐霉数量增加，木霉数量降低；放线菌数量均表现为随温室使用年限增加而降低；脲酶和中性磷酸酶活性增强，而过氧化氢酶活性变化不明显．
The results showed that the amount of ammonifying bacteria, nitrifying bacteria and denitrifying bacteria increased by 1.07 ~ 2 respectively in sunlight greenhouse soil compared with open field soil, .28 times, 50.47 ~ 68.79 times and 4.33 ~ 9.32 times; fungi showed an increase in the number of Pythium, Trichoderma reduced; actinomycetes number showed with the increase of service life of the greenhouse decreased; Urease and neutral phosphatase activities increased, while catalase activity was not significantly changed.