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  • ISSN 1000-694X
  • 双月刊 创刊于1981年
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生物与土壤

乌拉特荒漠草原小针茅(Stipa klemenzii)群落土壤细菌多样性及垂直分布特征

  • 王少昆 ,
  • 赵学勇 ,
  • 贾昆峰 ,
  • 高宝兰 ,
  • 曲浩 ,
  • 毛伟 ,
  • 连杰 ,
  • 陈敏 ,
  • 朱阳春
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  • 1. 中国科学院寒区旱区环境与工程研究所 奈曼沙漠化研究站, 甘肃 兰州 730000;
    2. 乌拉特后旗林业局, 内蒙古 乌拉特后旗 015000;
    3. 乌拉特后旗草原管理站, 内蒙古 乌拉特后旗 015000
王少昆(1982-),男,陕西绥德人,博士,助理研究员,主要从事干旱半干旱地区土壤微生物生态学研究。E-mail:wangsk@lzb.ac.cn

收稿日期: 2015-12-20

  修回日期: 2016-04-14

  网络出版日期: 2016-11-20

基金资助

国家自然科学基金项目(41401620,41501572);中国科学院“百人计划”项目(Y451H31001);内蒙古自治区科技重大专项(Y439K71001)

Soil Bacterial Diversity and Its Vertical Distribution in Stipa klemenzii Community of Urad Desert Steppe

  • Wang Shaokun ,
  • Zhao Xueyong ,
  • Jia Kunfeng ,
  • Gao Baolan ,
  • Qu Hao ,
  • Mao Wei ,
  • Lian Jie ,
  • Chen Min ,
  • Zhu Yangchun
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  • 1. Naiman Desertification Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;
    2. Forestry Bureau of Urad Houqi, Urad Houqi 015000, Inner Mongolia, China;
    3. Grassland Management Station of Urad Houqi, Urad Houqi 015000, Inner Mongolia, China

Received date: 2015-12-20

  Revised date: 2016-04-14

  Online published: 2016-11-20

摘要

测定了乌拉特荒漠草原典型植被类型——小针茅(Stipa klemenzii)群落土壤细菌多样性及垂直分布特征。结果表明:乌拉特荒漠草原小针茅群落土壤细菌多样性的垂直分布表现出0~5 cm>10~20 cm>5~10 cm,其中表层(0~5 cm)土壤细菌多样性显著高于下层(5~10 cm和10~20 cm),5~10 cm和10~20 cm层之间差异不显著。土壤细菌在不同深度之间的群落相似度60%~70%。小针茅群落中土壤细菌分别归属于放线菌门(Actinobacteria)、芽单胞菌门(Gemmatimonadetes)、蓝细菌门(Cyanobacteria)、厚壁菌门(Firmicutes)、变形菌门(Proteobacteria)和酸杆菌门(Proteobacteria)。其中,Halospirulina sp.、Bacillus circulansLactobacillus pentosus是优势细菌(占总细菌的44.05%)。在荒漠草原小针茅群落中,土壤养分、机械组成和酸碱度共同影响着土壤细菌群落组成和分布格局,其中土壤pH值、全氮和黏粉粒含量(贡献率分别是24.28%、15.81%和10.60%)是影响细菌群落垂直分布的主要环境因子。

本文引用格式

王少昆 , 赵学勇 , 贾昆峰 , 高宝兰 , 曲浩 , 毛伟 , 连杰 , 陈敏 , 朱阳春 . 乌拉特荒漠草原小针茅(Stipa klemenzii)群落土壤细菌多样性及垂直分布特征[J]. 中国沙漠, 2016 , 36(6) : 1564 -1570 . DOI: 10.7522/j.issn.1000-694X.2016.00053

Abstract

Stipa klemenzii community is the typical vegetation in Urad desert steppe. Our observation on soil bacterial diversity and vertical distribution in Stipa klemenzii community showed that:soil bacterial vertical distribution performed 0-5 cm > 10-20 cm > 5-10 cm, and the diversity in the upper layer (0-5 cm) was significantly higher than that in the lower layers (5-10 cm and 10-20 cm). The bacterial community similarities were within 60%-70% among the three layers. The sequences analysis indicated that the bacterial species belonged to different phylum, including Actinobacteria, Gemmatimonadetes, Cyanobacteria, Firmicutes, Proteobacteria and Proteobacteria. Halospirulina sp., Bacillus circulans and Lactobacillus pentosus were the three dominant bacterial species (their abundance occupied 44.05% of all the 16 species). Soil nutrient, texture and pH collaboratively influenced the bacterial community composition and distribution. Soil pH, total nitrogen content and silt and clay content are the key factors to determine soil bacterial community composition in the Stipa klemenzii community of desert steppe, contributing 24.28%, 15.18% and 10.60%, respectively.

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