Abstract:

In order to understand the characteristics of microbial communities in the soil ecosystem of banana plantations infected by banana fusarium wilt and the correlation between the infection degrades of banana plants and soil microbial community structure, 30 rhizosphere and non-rhizosphere soil samples were collected from three typical plots (Jianfeng, Shiyuetian, Chongpo) infected by banana fusarium wilt of Hainan province in 2010. The microbial species diversity of 3 plots infected by banana fusarium wilt was studied using the traditional microbial counting method. The results indicated that: the numbers and species of culturable bacteria, Actinomyces and fungi in rhizosphere and non-rhizosphere soil from different susceptible level plants in same banana plot were lower than healthy plants, declined with increasing of susceptible level of banana plants. The numbers of pathogenic bacteria in rhizosphere and non-rhizosphere soil were increased with plant susceptible level increasing in three plots infected by Fusarium wilt of banana. The numbers of cultured microorganism in rhizosphere soil from three different banana plots significantly higher than those of non-rhizosphere soil, which reflected the rhizosphere effect that was the most significant for infected plants for bacteria and actinomycetes.