生物有机肥对香蕉根际土壤生物多样性的影响

通过盆栽试验检测了施用生物有机肥对香蕉枯萎病的防治作用,并利用Biolog-Eco技术分析了不同施肥处理对香蕉根际土壤微生物群落功能多样性的影响.结果表明,生物有机肥的施用(肥料作为底肥一次施入)可以推迟香蕉枯萎病的发生,在种植30 d时防病效果达到55.4%;香蕉枯萎病病情指数与AWCD值存在显著负相关,与Simpson指数呈极显著正相关.主成分分析表明,各处理点在PRIN轴上的分布与发病动态基本一致,且根际微生物群落有明显的差异,不同施肥处理对根际微生物群落功能有显著影响;经生物有机肥处理的根际微生物的活性较高,其利用的碳源中聚合物类和胺类相对较多,类型有别于有机肥和不施肥处理.

Effects of Bio-organic Fertilizer on Biodiversity in Rhizosphere Soil of Banana

The pot experiments were carried out to investigate the effects of bio-organic fertilizer on banana wilt disease and the influences of different fertilization treatments on bacterial community diversity in banana rhizosphere soil by Biolog-Eco plate method. The results showed that banana wilt disease was postponed by using bio-organic fertilizer. Control effects of bio-organic fertilizer on banana wilt disease were 55.4% after 30 days cultivation. The index of banana wilt disease was significantly negative correlated with AWCD in biolog plate, but significantly positive correlated with Simpson index. Results of principal components analysis indicated that distribution of different fertilization treatments were similar to the incidence trends, and rhizosphere microbial communities was obviously different; different fertilization treatments had a significant effect on the rhizosphere microbial community. Microbial activity in the rhizosphere soil of bio-organic fertilizer treatment was better. Furthermore, the category of carbon utilized by microbial in rhizosphere soil of bio-organic fertilizer treatment was different from that of organic fertilizer and control, and the polymers and amines were preferred.