Effects of Repeated Applications of Chlorimuron-Ethyl on the Soil Microbial Biomass, Activity and Microbial Community in the Greenhouse

  • Jun Xu
  • Ying Zhang
  • Fengshou Dong
  • Xingang Liu
  • Xiaohu Wu
  • Yongquan Zheng
Article

Abstract

The impacts of repeated chlorimuron-ethyl applications on soil microbial community structure and function were studied under greenhouse conditions. Chlorimuron-ethyl was applied to soil samples at three different doses [1-,10-,100-fold of recommended field rate (T1, T10, T100)] for 3 years. The half-lives of chlorimuron-ethyl were 37.1–54.6 days. The soil microbial biomass (microbial biomass carbon and total phospholipid fatty acid), the microbial activity (basal respiration and average well color development), the ratio of Gram-negative/Gram-positive bacteria and Shannon index were stimulated by chlorimuron-ethyl during the initial period. Except for T100, the other treatments recovered to the untreated level. The ratio of fungi/bacteria decreased during the initial period and then recovered in the end. Principal component analysis of phospholipid fatty acid showed that chlorimuron-ethyl altered the microbial community structure. Except got T100, T1 and T10 were not different from the control at the end of experiment. These results suggested a dosage effect of chlorimuron-ethyl on the living microbial biomass and the microbial community.

Keywords

Chlorimuron-ethyl Repeated application Soil activity Soil microbial community 

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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • Jun Xu
    • 1
  • Ying Zhang
    • 1
  • Fengshou Dong
    • 1
  • Xingang Liu
    • 1
  • Xiaohu Wu
    • 1
  • Yongquan Zheng
    • 1
  1. 1.State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijingChina

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