Soil nutrient status, microflora and their biochemical act ivities and enzyme activity in the rhizospheric soil and non-rhizospheric soil under Rhododendron fortunei in 3 different types of forests were investigated.The results showed that the number of soil bacteria functional colonies were closely related to soil nutrients and soil enzyme activities.Under good sun-light and aeration, the rhizospheric effect was significant in the Guiyundong Rhododendron fortunei community (R/S value) as compared with that of the other two.However, because of high vegetation coverage and low soil porosity, the activities of catalase and peroxidase were low, the soil capacity of transforming toxin was weak and the process of humification was slow in rhizosphere of the Rhododendron fortunei communities in Huangjingdong and Yongziting.Besides the populations of fungi and actinomyces in the soil increased significantly.These are clear indicators of degradation of the soil properties.All the results indicate that degeneration of Rhododendron fortunei could be prevented by pruning canopies of the surroundings arboreal trees and cleaning out Indocalamus latifolius.