大蒜根际土壤微生物数量及酶活性动态研究

目的]研究大蒜不同时期根际的微生物数量及土壤酶活性的变.方法]以白皮蒜和紫皮蒜为试验材料,分别测定不同时期根际微生物数量,及土壤脲酶酸性磷酸活性。结果]各时期2个大蒜品种均促进了根际土壤中细菌、放线菌和真菌的生长,间接提高了根际土壤中脲酶、磷酸酶和过氧化氢酶的活性,从而提高了大蒜根际土壤中氮、磷等营养元素的周转与循环,为下茬作物生长提供了良好的微生态环境。结论]该研究为大蒜作为一种良好的前茬作物的生态学研究提供理论依据。

Dynamic Study of Microbial Population and Enzyme Activity in Rhizosphere Soil of Allium sativum L.

Objective] The aim was to investigate the changes in microbial population and soil enzyme activities in rhizosphere soil of two cultivars of Allium sativum L.at different growth stages.Method]By using white garlic and purple garlic as the experimental materials,the microbial population,and the activities of urease,acid phosphatase and catalase in their rhizosphere soil at different growth stages were measured.Result]The root exudates of the two garlic cultivars could promote the growth of bacteria,fungi and actinomycetes,and indirectly increase the urease,acid phosphatase and catalase activities in the rhizosphere soil,thereby improving the turnover and circulation of the soil nutrition elements such as nitrogen and phosphorus,and providing a better micro-ecological environment for the later crop.Conclusion]The study had provided theoretical basis for the ecological research on garlic used as a preceding crop.