对烟草根结线虫衰退土中捕食线虫真菌的种类组成 ,垂直分布 ,物种相对多度模型及分布格局等基本特征进行了调查分析 .结果表明分布于衰退土中的捕食线虫真菌种类共有 7个属 ,30个种 .不同的衰退土样地 ,多数捕食线虫真菌种类是相同的 ,且各有一定的富集种组成 .捕食线虫真菌在土壤中的垂直分布随土层的加深而减少 .捕食线虫真菌种类基本上服从对数正态分布模型 ,多数富集种呈随机分布 The species composition, vertical distribution, species relative abundance model and distribution pattern of nematode fungi in the soil of root-knot nematode recession were investigated and analyzed.The results showed that there were 7 genera of nematode , 30 species.Different recession soil samples, the majority of the predatory nematode fungi species are the same, and each have a certain enrichment species.The vertical distribution of predatory nematode fungi in soil decreases with the deepening of the soil layer. Fungi species basically obey the lognormal distribution model, most of the rich species were randomly distributed