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Effect of vegetation on soil bacteria and their potential functions for ecological restoration in the Hulun Buir Sandy Land,China

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Journal of Arid Land 2020年第3期12卷 473-494页

作者： YAN Ru FENG Wei Yanchi Research Station School of Soil and Water ConservationBeijing Forestry UniversityBeijing 100083China Engineering Research Center of Forestry Ecological Engineering of the Ministry of Education Beijing Forestry UniversityBeijing 100083China

To date,much of research on revegetation has focused on soil microorganisms due to their contributions in the formation of soil and soil remediation ***,little is known about the soil bacteria and their functions respond to the diverse vegetational types in the process of vegetation *** of dominated vegetation,i.e.,Artemisia halodendron Turcz Ex Bess,Caragana microphylla Lam.,Hedysarum fruticosum *** Pinus sylvestris *** bacterial community structures and their potential functions in the Hulun Buir Sandy Land,China were determined using high-throughput 16S rRNA gene sequencing and phylogenetic investigation of communities by reconstruction of unobserved states(PICRUSt)in *** the dominant phyla of soil bacterial community among different types of vegetation,including Proteobacteria,Actinobacteria,Acidobacteria,Bacteroidetes and Firmicutes,were similar,the relative abundance of these dominant groups significantly differed,indicating that different types of vegetation might result in variations in the composition of soil bacterial *** addition,functional genes of bacterial populations were similar among different types of vegetation,whereas its relative abundance was significantly *** carbon fixation genes showed a high relative abundance in ***,*** carbon decomposition genes in ***,suggesting the variations in carbon cycling potential of different types of *** of assimilatory nitrate reduction genes was the highest in ***,*** nitrate reduction and nitrate reductase genes in ***,indicating higher nitrogen gasification loss and lower nitrogen utilization gene functions in *** structures and functional genes of soil bacterial community showed marked sensitivities to different plant species,presenting the potentials for regulating soil carbon and nitrogen cycling.

关键词： bacterial taxonomic composition functional gene vegetational type soil carbon and nitrogen 16S rRNA

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