关键词: 香蕉, 植物根际促生菌, 香蕉枯萎病, 促生抗病作用, 营养吸收效应

Abstract: Plant growth-promoting rhizobacteria（PGPR），which can promote the plant growth and yield，and inhibit plant pathogens，are microorganisms colonized in the plant rhizosphere. A pot experiment was carried out to investigate the effects of PGPR on the growth of banana seedlings，absorption and utilization of nutrient and the suppression of the banana fusarium-wilt disease. The results showed that 56 days after treatments by PGPR，the differences of height，stem diameter，above-ground biomass，root length，root biomass，total biomass，leaf area per plant and leaf chlorophyll content of banana seedlings between treatment and control were remarkable increased by 18.5%–28.9%，17.0%–18.2%，16.8%–33.9%，41.5%–47.6%，65.5%–69.5%，24.8%–39.8%，24.0%–38.3% and 30.0%–44.9%，respectively. The absorptions of N，P2O5，K2O，CaO and MgO of seedlings treated by PAB-2 were higher than those of control，increased by 51.1%，46.1%，165.2%，7.4%，32.8% respectively. Inoculated by FOC，MAD contents of leaf in the treatments of PGPR were decreased by 4.4%–10.6%. Disease Severity Indices（DIS）of banana fusarium-wilt in the treatments of PGPR were reduced by 12.5–31.3，which the total control effects reached 18.8%–46.9%. The results indicated that the application of PGPR could effectively promote growth，nutrition absorption of banana seedlings，and reduce the occurrence of banana fusarium wilt.

Key words: banana, plant growth-promoting rhizobacteria, the banana fusarium-wilt disease, growth-promoting and plant disease-controlling function, nutrition absorption effect