Rhizospheric -Facilitated Effects on the Growth and Competitive Ability of the Invasive Plant .

The rhizospheric microbial community affects the population establishment of invasive plants in introduced areas, among which has numerous functions in promoting plant growth. This study isolated and enriched the community in the rhizospheric soil of the invasive plant and the native accompanying plant . The effects of these rhizospheric communities on the growth and competition of and were evaluated in pot experiments. The results showed that the number and diversity of in the rhizospheric soil of were higher than those of (: 122 strains in soil, 16 taxa; : 88 strains in soil, 9 taxa). After inoculation of in a pot experiment, , and were accumulated in the rhizospheric of , which significantly increased the nitrate nitrogen (NO -N) content in the soil and the total carbon and nitrogen concentrations in in the mixed treatment. The selective accumulation of enhanced the competitive advantage of over the native accompanying plant; the corrected index of relative competition intensity of . -inoculated reached double that of the uninoculated treatment, and the growth of native plants was greatly suppressed under mixed planting. Our study confirmed that invasion of can lead to the accumulation of specific taxa in the rhizospheric soil, which in turn can increase the competitive advantage of .