benefits the competitive growth of by increasing available nutrient levels.

can help plants to acquire nutrients either directly or indirectly. However, the role of community on the competitive growth of invasive is poorly understood. Native is often found in areas that have been invaded by . We sought to determine whether the quantitative and/or qualitative differences in the community present on the invasive and native provide a competitive advantage to the invasive over native species. A field experiment was established to imitate the invasion of . The 16S rRNA gene was commercially sequenced to identify the bacilli isolated from the rhizosphere soil of field-grown and . The communities in their rhizosphere were compared, and their effects on the competitive growth of and were tested in the pot experiments. in the rhizosphere soil of significantly enhanced its intra-specific competitive ability. The relative abundance of in the rhizosphere soil of was significantly higher than that of . Inoculation with that was isolated from the rhizosphere soil of both and significantly enhanced the relative competitiveness of and inhibited that of . The higher abundance of in the rhizosphere of creates higher levels of available nutrients than that in the native , which enhance the competitive growth of . The result helps to discover the mechanism of community in the invasion of .