摘要：The hotspot is to evaluate and improve alkali- saline grassland base on soil microbial community. In order to reveal the influence of alkali-saline on soil bacterial community in Songnen grassland, the composition and diversity of soil bacterial in different degrees of alkali-saline grassland were determined and analyzed by high-throughput sequencing. The results showed that Soil bacterial community composition in Songnen grassland changed minuscule. Acidobacteria, Gemmatimonadetes, Bacteroidetes, Firm icutes and Saccharibacteria were significantly correlated with pH value, which could be used as sensitive indicators of soil salinization in Songnen grassland. The increase of pH value had a significant induction effecton the alpha diversity of bacterial community (sobs, Shannon index, simpson index, ace index, chao index) (P < 0.05), and the alpha diversity were decrease with the increase of pH value. PERMANOVA analysis showed that bacterial communities of different pH soil type were highly significant different.
关键词：Soil Bacteria community;Composition and diversity;High-throughput sequencing;Songnen grassland
