施用农用化学品及生防制剂的大豆胞囊线虫田根际真菌区系动态

The Rhizosphere Mycobiota of Soybean in Soils with Cyst Nematodes Treated with Chemicals and Bio-control Preparations

采用除草剂、尿素和线虫生防制剂豆丰1号颗粒剂处理大豆胞囊线虫田土壤 ,定期取样、分离和鉴定,研究不同处理根际土壤真菌区系的动态变化。试验表明 :施用尿素有利于协调根际真菌区系平衡 ;除草剂施用后对根际真菌区系有抑制作用 ,但通过对除草剂有降解作用的真菌的产生可恢复根际真菌区系平衡 ;而颗粒剂的施用有利于有益真菌类群的增加 ,可通过向颗粒剂中添加多种大豆胞囊线虫寄生真菌如镰孢属(Fusarium)、粘帚霉属(Gliocladium)和拟青霉属(Paecilomyces)

The dynamics of rhizosphere mycobiota were studied in the soil with soybean cyst nematode treated with chemical compounds and bio-control preparations. The results suggested that Urea was in favor of the rhizosphere mycobiota balance. Herbcide inhibited the rhizosphere mycobiota, but the balance of mycobiota could be with the occurrence of some fungi, which could degraded the herbcides. The application of Doufeng-1 could increase the beneficial fungi, the better control effects could be realized by adding Fusarium, Gliocladium and Paecilomyces.