Biotechnology Bulletin ›› 2020, Vol. 36 ›› Issue (12): 64-74.doi: 10.13560/j.cnki.biotech.bull.1985.2020-1252

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The Response of Soil Microbial Community to Repeated Application Clomazone

ZHANG Ying1,2,3(), WU Xiao-hu2(), LI Xiao-gang3, DUAN Ting-ting1, XU Jun2, DONG Feng-shou2, LIU Xin-gang2, ZHENG Yong-quan2   

  1. 1. Institute of Plant Protection,Guizhou Academy of Agricultural Sciences,Guiyang 550006
    2. Institute of Plant Protection,Chinese Academy of Agricultural Sciences,State Key Laboratory for Biology of Plant Diseases and Insect Pests,Ministry of Agriculture and Rural Affairs,Key Laboratory of Control of Biological Hazard Factors(Plant Origin)for Agri-product Quality and Safety,Ministry of Agriculture and Rural Affairs,Beijing 100193
    3. College of Plant Protection,Hunan Agricultural University,Changsha 410128
  • Received:2020-10-12 Online:2020-12-26 Published:2020-12-22
  • Contact: WU Xiao-hu E-mail:zhangying201201@126.com;xhwu@ippcaas.cn

Abstract:

This work aims to investigate the responses of soil microbial communities and microbes with nitrogen-transforming functions to 2 years consecutive application of clomazone under greenhouse conditions. Soil was sampled after 7,15,30,60,and 90 d of second application and clomazone residue concentration and relevant microbial parameters were determined. The half-lives of clomazone in this experiment were 17.4 d. The results showed that copy numbers of bacteria decreased,whereas bacterial Alpha diversity increased. Copy numbers of fungi(day 15 and day 60)and fungal diversity(day 7 and day 90)significantly decreased. Principal co-ordinates analysis(PCoA)results revealed that the bacterial and fungal community structure significantly changed during the whole culture period. Furthermore,molecular ecological network analysis indicated that the network of clomazone-treated soils contained more nodes,links,higher average degree and average path distance than control soils,i.e.,clomazone application led to remarkable changes in key species of its community network. FAPROTAX functional prediction results showed clomazone mainly reduced denitrification function.

Key words: clomazone, soil microorganism, community structure, molecular ecology network, functional prediction