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《Journal of Arid Land Resources and Environment》 2017-09
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Analysis of culturable microbial communities in different land utilization types in semi-arid loess plateau ecological zones

LI Yanlin;CHEN Jixiang;ZHANG Yan;HAN Yanwen;WANG Yongang;YANG Zhi;Key Laboratory of Energy Supply System Drived by Biomass Energy and Solar Energy of Gansu Province ,School of Energy and Power Engineering,Lanzhou University of Technology;School of Petrochemical Engineering ,Lanzhou University of Technology;Gas Transmission Management Department of Shanxi,Petrochina Beijing Gas Pipeline Co Ltd;  
The quantity and community distributions of the cultivable microorganisms in soils of different land utilization types( upland meadow,cultivated land and river valley land) in typical semi-arid loess plateau biota in Northwest China were studied. The results showed that soil microbial populations are significantly different among various lands. The numbers of culturable bacteria,actinomycetes and fungi in the upland meadow were 6. 43 ×10~6cfu·g~(-1),2. 68 × 10~6cfu·g~(-1)and 0. 11 × 10~6cfu·g~(-1),respectively. The numbers in cultivated land were9. 27 × 10~6cfu·g~(-1),5. 33 × 10~6 cfu ·g~(-1)and 0. 07 × 10~6 cfu ·g~(-1),respectively. In the river valley land the numbers of culturable bacteria,actinomycetes and fungi were 2. 35 × 10~6cfu·g~(-1),2. 36 × 10~6cfu·g~(-1)and 0.08 × 10~6cfu·g~(-1),respectively. The cultivable bacteria of upland meadow belonged to three phylogenetic groups of Firmicutes,Actinobacteria and Alphaproteobacteria,including Bacillus,Microbacterium,Arthrobacter and Agrobacterium,with the main genus being Bacillus( 69. 23%). The bacteria from the cultivated land were affiliated with Firmicutes, Actinobacteria, Alphaproteobacteria and Gammaproteobacteria, including Bacillus,Agrobacterium,Staphylococcus,Arthrobacter and Peseudomonas. The isolates from the river valley land belonged to Firmicutes and Actinobacteria including Arthrobacter,Staphylococcus and Paenibacillus,with the main genus being Staphylococcus( 50. 00%). The isolated actinomycetes belonged to the following four genera: Streptosporangium,Atreptomyces,Streptoverticillium and Micromonspora,with the main genus being Atreptomyces. The culturable fungi were placed in six main groups including Penicillium,Aspergillus,Cladosporium,Mucor,Coniothecium and Alternaria,with the main genus being Penicillium.
【Key Words】: semi-arid loess area culturable microbes quantity community diversity
【Fund】: 国家自然科学基金(31272694);; 中国石油天然气股份有限公司天然气与管道分公司科研项目(2014D-4610-0501)资助
【CateGory Index】: S154.3
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