Analysis of bacterial community structure and diversity in rhizosphere of halophytes in shell embankment

Limonium bicolor and Suaeda salsa are prevalent halophytes in shell banks. Investigating the disparities in their community structures can enhance local soil and restore vegetation. This study employed two halophytes to explore the impact of halophytes on soil improvement and vegetation restoration. Through high-throughput sequencing technology, the rhizosphere microbial community structure, Alpha diversity, and Beta diversity were analyzed to determine soil physicochemical properties. Simultaneously, the rhizosphere microbial ASV abundance analysis and the functional prediction by PICRUSt2 were conducted. The results indicated significant differences between the two plants in the indicators above. The findings further demonstrated that, based on screening the dominant genera in the rhizospheres of the two plants, a combination of highly efficient growth-promoting and salt-tolerant strains could be directionally cultured. Moreover, the formulation of microbial agents could be optimized in conjunction with the regulatory requirements of soil physicochemical properties, which could enhance the salt tolerance and nutrient absorption efficiency of plants and improve soil quality. In vegetation restoration in saline-alkali land, a precise plant-microorganism collaborative restoration scheme can be formulated according to the characteristics of plant rhizosphere microorganisms and soil physicochemical properties.