The littoral ecotone between land and lake makes an important part of the lake ecosystem which provide essential ecosystem services for human society. In this paper, the littoral wetland zone of Balagasi Lakeshore, Inner Mongolia, China and steppe being adjacent to was taken as the research object to discuss the characteristics of bacterial diversity and community structure in non-rhizosphere soils along zonal distribution of plants in the arid area. From the sediment of the exposed lakebed to the landward, according to the distribution of plant communities (Phragmites australis, Kalidium foliatum, Achnatherum splendens, Reaumuria songarica and Stipa klemenzii), the relationship between plant communities and soil physical and chemical factors were analysed. The Illumina HiSeq high-throughput sequencing method was used to measure bacterial community diversity and composition in their non-rhizosphere soils along the zonal distribution of plant. The results showed that the distribution of plant communities in the littoral zone of Balagasi Lake was mainly affected by soil bulk density, pH, TP, AP, TOC and TN. Meanwhile, the distribution of bacterial communities in non-rhizosphere soils was mainly affected by water content, salinity, AP, TOC, TP of soils. The communities of Achnatherum splendens, Reaumuria songarica, Stipa klemenzii were negatively correlated with pH, water content and nutrient content, while the Phragmites australis was opposite. There was a positive correlation between the Kalidium foliatum community and soil nutrient content. The species diversity of soil bacteria was the lowest in lakebed sediment. There was a significant negative correlation between Acidobacteria\Verrucomicrobia\Actinobacteria and soil salinity, so in the three sample groups near the lakebed area (lakebed sediment, Phragmites australis community, Kalidium foliatum community), the relative abundance of which was lower than slope and landward terrace. However, the relative abundance of Proteobacteria was opposite. Bacteroidetes was positively correlated with soil nutrients, and its relative abundance was the highest in the non-rhizosphere soil of Kalidium foliatum community with the highest soil nutrients.

陆地和湖泊之间的沿海过渡带是湖泊生态系统的重要组成部分，为人类社会提供了必要的生态系统服务。以内蒙古巴拉加斯湖岸沿岸湿地带及其邻近草原为研究对象，探讨干旱地区非根际土壤细菌的多样性和群落结构特征。区。从裸露的湖床沉积物到陆地，根据植物群落的分布情况（芦苇，叶形钾，Ac草，Reaumuria songarica和Stipa klemenzii），分析了植物群落与土壤理化因子之间的关系。Illumina HiSeq高通量测序方法用于测量沿植物带状分布的非根际土壤中细菌群落的多样性和组成。结果表明，巴拉加西湖沿岸带植物群落的分布主要受土壤容重，pH，TP，AP，TOC和TN的影响。同时，非根际土壤中细菌群落的分布主要受土壤水分，盐度，AP，TOC，TP的影响。的社区芨芨草，琵琶准噶尔沙，针茅茅呈负pH值，水分含量和营养物含量相关，而芦苇相反。叶钾盐群落与土壤养分含量呈正相关。湖底沉积物中土壤细菌的物种多样性最低。酸性细菌\疣状微生物\放线菌与土壤盐度之间存在显着的负相关，因此在湖床区附近的三个样本组（湖床沉积物，芦苇群落，叶形钾群落），其相对丰度低于坡度和陆向阳台。然而，变形杆菌的相对丰度却相反。拟杆菌属与土壤养分呈正相关，在非根际土壤中其相对丰度最高。叶片钾的土壤养分最高。