摘要： 为防治土传病害,克服黄瓜连作障碍,探讨了土壤生物添加剂不同添加量对土壤微生物种群结构的影响.结果表明,土壤添加剂施用后不同时期,土壤微生物总量增多,土壤细菌和放线菌变化较大,真菌变化不大.优势菌的种类和数量发生变化,木霉、青霉等一些有益菌数量明显增加,根际优势种的抑菌作用较强.施用添加剂后,提高了土壤微生物多样性,能够调节土壤微生物群落结构,比应用化学农药更具有生态安全性.

关键词: 生物土壤添加剂, 黄瓜, 连作障碍, 土壤微生物

Abstract: Soil biologic amendment (BSA)was applied to the cucumber continuous cropping to control soil2borne dis2 eases and reduce replant diseases of cucumber. The changes of soil microorganism population structure were discussed by different agent. The result showed that total population of cucumber rhizosphere microbes increased remarkably after ap2 plying soil amendment.Number of bacteria and actinomycetes had a drastic variation.Number of fungi increased slightly. The species and amount of the dominant species were changing,beneficial microbes such as Trichoderma and Penicillium were more.Dominant species in rhizosphere antagonism were stronger along with controlling effect increasing. Applying BSA could increase soil microbial diversity and adjust community structure of soil microbial,and had better ecological sta2 bility than fungicide.

Key words: Biological soil amendment, Cucumber, Replant diseases, Rhizosphere microbes

中图分类号: 

• S1.2