干旱风沙区植被重建初期对土壤微生物群落结构的影响

: To elucidate the effect of revegetation on soil microbial community structure in an arid desert region, the revegetation area built to protect the Wuhai-Maqin Highway across the Tengger Desert, northwest China from dune blow was selected as the study area. High-throughput sequencing technology was applied to reveal the characteristics of soil microbial community structure under the revegetation, and selecting the moving dune as a comparison. Results found that microbial community composition was similar between the revegetated soil and moving dune, dominated by Actinobacteria (58.53%-67.85% ) and Proteobacteria (16.53%-19.68% ). Nocardia, Methylotenera, Rubellimicrobium, and Microvirga were the dominant genera in the revegetation area and moving dune. In contrast to the moving dune, the revegetation significantly increased the relative abundance and diversity of most phylum of microorganisms but significantly decreased soil pH, electrical conductivity, and salinity. Furthermore, compared with the moving dune, the revegetation significantly increased soil microbial biomass P and C:N at three soil layers, including 0-5 cm, 5-10 cm, and 10-20 cm. Overall, the revegetation could significantly improve the nutrient level and the relative abundance and diversity of soil microorganisms at the topsil layer of the desert ecological protection belt beside the highway