Analysis of bacterial community structure and diversity characteristics of mixed forest of Robinia pseudoacacia and Ailanthus altissima and there pure forest in the Yellow River Delta

The aim of the present study was to investigate the characteristics of soil bacterial community in different forests in the Yellow River Delta. High-throughput sequencing technology was used to compare the soil microbial communities from different forests, that is pure Robinia pseudoacacia forest, pure Ailanthus altissima forest, and their mixed forest. The soil physicochemical properties were measured to determine the correlations between them. Results showed that the composition and structure of soil bacterial communities were different among these forests. At the level of bacterial phylum classification, 27, 25, 31 bacteria were detected in the soil of A. altissima, R. pseudoacacia, and the mixed forest, respectively. For all these three stands, there were eight main bacterial communities, that was acidobacteria, proteobacteria, actinobacteria, nitrospirae, chloroflex, planctomycetes, gemmatimonadetes and verrucomicrobia, among which the acidobacteria, proteobacteria and actinobacteria were the dominant ba