中文摘要：

研究了光合细菌菌液和发酵有机肥施入农田土壤后表层土壤微生物类群和土壤酶变化情况。结果表明，光合细菌和有机肥显著促进土壤中放线菌、异养细菌、固氮菌、氨化细菌和硝化细菌的生长，而抑制反硝化细菌数量。施用光合细菌和有机肥可以改善土壤微生物区系，光合细菌作用比有机肥更稳定和持久。光合细菌还能明显降低土壤真菌数量，提高放线菌／真菌比值。光合细菌和有机肥对过氧化氢酶、脲酶、转化酶、碱性磷酸酶、蛋白酶等5种土壤酶活性均有明显促进作用，有机肥作用大于光合细菌。

英文摘要：

The microbial flora and soil enzyme activities were detected after photosynthetic bacteria （PSB） and the fermented organic fertilizer were applied in.to the soils. The results showed that PSB and organic fertilizer could promote the growth of actinomyces, heterotroph bacteria, azotobbacter, ammonifying bacteria and nitrobacteria significantly, and restrain the growth of denitrifying bacteria in the soils. The effect of PSB was more stable and perdurable than that of organic fertilizer. PSB could restrain the growth of fungi in the soils, and enhance the ratio of actinomyces and fungi. The activities of five soil enzymes all increased under PSB or organic fertilizer applications, and the effect of organic fertilizer was more apparent than that of PSB.