Abstract:The population composition and seasonal variation of VA mycorrhizal fungi spores in the rhizosphere soil of four mycorrhized plants which were transplanted in the greenhouse from the field were studied.It was found that the sporulation of VA mycorrhizal fungi was obviously with host-dependence and seasonal variation.The composition of VA mycorrhizal fungi population differed in the rhizosphere soil of different host plants.The spore abundance of the same species of VAmycorrhizal fungus was dignificantly different in the rhizosphere soil of different hosts which were grown in the same habitat.The factors that affect spore population composition and seasonal variation of VA mycorrhizal fungi were discussed in this article.