Abstract: In order to understand the structure of the wild population and analyze its current survival situation, an investigation was conducted in the natural distribution region of Prunus divaricata population. Adopting space as a substitute for time, a comparative analysis was made on the ageclass, heightclass, and crown widthclass of the population, and the dynamics of the age structure of the population was described according to the static life table. The results showed that the structure of the crown widthclass and heightclass showed a certain degree of decline, and there was an overall logarithmic decline in crown widthclass. Due to the effects of different microenvironments among the plots, the population structure had definite difference. The survival curve fitted the B1 type (steptype curve), indicating that the seedlings had a high mortality rate, and there were significant differences in the death rate at different life stages. The natural population of wild P. divaricata in Xijiang showed some unstable characteristics. Therefore, it is urgently needed to supplement seedlings or young individuals and to prohibit felling adult individuals so as to provide guarantee for the conservation and recovery of wild P. divaricata population.

Key words: wheat and faba bean intercropping, microbial diversity, phenolic allelochemicals, fusarium wilt, physiological resistance.