为研究腐熟秸秆肥施用后对烤烟根系土壤中各种微生物数量及土壤酶活性的影响，设置化肥和腐熟秸秆肥两个处理，并在烟草生长的不同时期取土样，检测土壤中5种微生物数量和4种酶活性的变化。结果表明：施用腐熟秸秆肥增加了土壤磷酸酶和脲酶的活性，促进了土壤中磷和氮的转化和吸收。腐熟秸秆肥增加了土壤细菌、放线菌、硝化细菌和氨化细菌的数量，提高了土壤微生物种群的数量，明显改善了土壤生物特性。腐熟秸秆肥对土壤真菌数量、过氧化氢酶和转化酶活性影响较小。表明腐熟秸秆肥可提高烤烟土壤酶活性和微生物数量，提高土壤生物活性。%Effects of decayed straw manure on microbe and enzyme activities in tobacco root zone soil were studied by comparing with chemical fertilizer. Soil samples were analyzed in different growth periods. Five types of microbes and four types of enzyme activities were detected. Results showed that decayed straw manure significantly increased activities of soil phosphatase and urease, and improved conversion and absorption of phosphorus and nitrogen. Decayed straw manure increased the number of soil bacteria, actinomyces, nitrifying bacteria, amonifying bacteria and soil microorganisms while the number of fungi and invertase and peroxidase activity were less affected. Results also showed that decayed straw manure could increase soil enzyme activity and the number of soil microbes, and thus soil biological activity.
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