Journal of Integrative Agriculture ›› 2013, Vol. 12 ›› Issue (10): 1872-1883.DOI: 10.1016/S2095-3119(13)60399-8

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Soil Microbial Community Composition During Natural Recovery in the Loess Plateau, China

  href="https://www.chinaagrisci.com/Jwk_zgnykxen/CN/article/advancedSearchResult.do?searchSQL=(((XIAO Lie[Author]) AND 1[Journal]) AND year[Order])" target="_blank">XIAO Lie, href="https://www.chinaagrisci.com/Jwk_zgnykxen/CN/article/advancedSearchResult.do?searchSQL=(((LIU Guo-bin[Author]) AND 1[Journal]) AND year[Order])" target="_blank">LIU Guo-bin, href="https://www.chinaagrisci.com/Jwk_zgnykxen/CN/article/advancedSearchResult.do?searchSQL=(((XUE Sha[Author]) AND 1[Journal]) AND year[Order])" target="_blank">XUE Sha,ZHANG Chao   

  1. 1 State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100, P.R.China
    2 Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resource, Yangling 712100, P.R.China
  • 收稿日期:2012-10-25 出版日期:2013-10-01 发布日期:2013-10-01
  • 通讯作者: Correspondence LIU Guo-bin, Tel: +86-29-87012907, E-mail: gbliu@ms.iswc.ac.cn
  • 作者简介:XIAO Lie, Mobile: 13474296757, E-mail: xiaosha525@163.com
  • 基金资助:

    This work was funded by the Strategic Technology Project of Chinese Academy of Sciences (XDA05060300), and the Science and Technology Research and Development Program of Shaanxi Province, China (2011KJXX63).

Soil Microbial Community Composition During Natural Recovery in the Loess Plateau, China

 XIAO Lie, LIU Guo-bin, XUE Sha,ZHANG Chao   

  1. 1 State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100, P.R.China
    2 Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resource, Yangling 712100, P.R.China
  • Received:2012-10-25 Online:2013-10-01 Published:2013-10-01
  • Contact: Correspondence LIU Guo-bin, Tel: +86-29-87012907, E-mail: gbliu@ms.iswc.ac.cn
  • About author:XIAO Lie, Mobile: 13474296757, E-mail: xiaosha525@163.com
  • Supported by:

    This work was funded by the Strategic Technology Project of Chinese Academy of Sciences (XDA05060300), and the Science and Technology Research and Development Program of Shaanxi Province, China (2011KJXX63).

摘要: This study aimed to determine the characteristics of soil microbial community composition and its relationship with soil chemical properties during natural recovery in the Loess Plateau. The soil microbial community composition was analyzed by comparing the soil microbial phospholipid fatty acids (PLFAs) of eight croplands abandoned for 1, 3, 5, 10, 13, 15, 20, and 30 yr in the Dunshan watershed, northern Loess Plateau, China. The results showed that soil organic carbon, total nitrogen, soil microbial biomass carbon, and soil microbial biomass nitrogen significantly increased with the abandonment duration, whereas the metabolic quotient significantly decreased. The Shannon richness and Shannon evenness of PLFAs significantly increased after 10 yr of abandonment. Gram-negative, Gram-positive, bacterial, fungal, and total PLFAs linearly increased with increased abandonment duration. Redundancy analysis showed that the abandonment duration was the most important environmental factor in determining the PLFA microbial community composition. The soil microbial PLFAs changed from anteiso- to iso-, unsaturated to saturated, and short- to long-chain during natural recovery. Therefore, in the Loess Plateau, cropland abandonment for natural recovery resulted in the increase of the soil microbial PLFA biomass and microbial PLFA species and changed the microbial from chemolithotrophic to a more heterotrophic community.

关键词: abandoned cropland , microbial diversity , phospholipid fatty acid (PLFA) , redundancy analysis (RDA) , Loess Plateau

Abstract: This study aimed to determine the characteristics of soil microbial community composition and its relationship with soil chemical properties during natural recovery in the Loess Plateau. The soil microbial community composition was analyzed by comparing the soil microbial phospholipid fatty acids (PLFAs) of eight croplands abandoned for 1, 3, 5, 10, 13, 15, 20, and 30 yr in the Dunshan watershed, northern Loess Plateau, China. The results showed that soil organic carbon, total nitrogen, soil microbial biomass carbon, and soil microbial biomass nitrogen significantly increased with the abandonment duration, whereas the metabolic quotient significantly decreased. The Shannon richness and Shannon evenness of PLFAs significantly increased after 10 yr of abandonment. Gram-negative, Gram-positive, bacterial, fungal, and total PLFAs linearly increased with increased abandonment duration. Redundancy analysis showed that the abandonment duration was the most important environmental factor in determining the PLFA microbial community composition. The soil microbial PLFAs changed from anteiso- to iso-, unsaturated to saturated, and short- to long-chain during natural recovery. Therefore, in the Loess Plateau, cropland abandonment for natural recovery resulted in the increase of the soil microbial PLFA biomass and microbial PLFA species and changed the microbial from chemolithotrophic to a more heterotrophic community.

Key words: abandoned cropland , microbial diversity , phospholipid fatty acid (PLFA) , redundancy analysis (RDA) , Loess Plateau