Fungi Diversity of Ginseng Rhizosphere Soil in Northeastern China

[Objective] The aim was to know the pathogenic fungi types and distribution law in ginseng rhizosphere soil.[Method] During May to Oct.in 2008 and 2009,more than 200 soil samples were collected from ginseng rhizosphere soil in Ji'an City,Fusong County of Jilin Province and Huanren County of Liaoning Province.Soil dilution plate method and soil particle method were adopted to isolate and culture soil fungi,then classification and identification were carried out.[Result] 33 species of 22 fungal genera were identified.The results showed that the composition,quality and diversity distribution of soil fungal populations were affected by the environmental conditions of ginseng growing areas.The dominant fungal populations in three investigated areas were Penicillium,Trichoderma and Fusarium.The Penicillium species was the major fungal population in Ji'an ginseng rhizosphere soil,and the Trichoderma species was the dominant fungal group in Huanren ginseng rhizosphere soil.In view of ecological statistical analysis,Ji'an fungal biodiversity index(H')and uniformity index(J)were greater than Huanren County and Fusong County.It indicated that the diversity of eco-environment had an evident effect on soil fungal diversity of ginseng rhizosphere soil.[Conclusion] The study will provide theoretical basis for scientific and effective ginseng disease prevention and control.