通过盆栽试验研究生防制剂中厚孢轮枝菌在烤烟K326和云85根际的定殖情况及对根际微生物的影响。结果表明施入生物菌剂2周后厚孢轮枝菌能在烤烟外根际、根表分离到,但在根内不能分离到或分离数极少,在4周、6周时外根际、根表的分离数达到最大,根内分离数仍很少,8周时分离数又减少。制剂处理后烤烟根际细菌、真菌和放线菌数量在2周时明显减少,4周时有所回升,6周和8周时与对照达到平衡。结果表明厚孢轮枝菌可以在烟草外根际、根表定殖,初期对土壤微生物具有一定的抑制作用。 The pot experiment was conducted to study the colonization of Rhizospheric microorganisms by Fusarium verticillium in flue-cured tobacco K326 and cloud 85. The results showed that two weeks after the application of biocide, Verticillium fasciatus could be separated from the rhizosphere and root surface of flue-cured tobacco except for the number of isolated or isolated seeds in the root. After 4 and 6 weeks, the outer rhizosphere and root Table the number of the largest number of separation, root number is still very small, 8 weeks, the number of separation and reduced. The amount of rhizobacteria, fungi and actinomycetes in the flue-cured tobacco significantly decreased after 2 weeks of treatment, but rose at 4 weeks and reached equilibrium with the control at 6 and 8 weeks. The results showed that Verticillium fumigatus could colonize the outer rhizosphere and root of tobacco and had certain inhibitory effects on soil microbes at the initial stage.