Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2017, Vol. 33 ›› Issue (24): 148-153.doi: 10.11924/j.issn.1000-6850.casb16070108

Special Issue: 资源与环境 农业生态

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Weeds Ecological Niche of Different Rotation Fields in Dingxi

  

  • Received:2016-07-20 Revised:2016-09-02 Accepted:2016-09-18 Online:2017-09-05 Published:2017-09-05

Abstract: To explore weed species niche of different rotation field in Dingxi, Weed survey was conducted by the method of inverted W-sampling to investigate seedling stage weeds in different rotation field.The research studied the niche breadth and niche overlap of the main weeds species by Levins niche breadth index and Schoener niche overlap index , effects of different rotation on farmland weed niche. The results showed that, Sonchusoleraceus L. and Chenopodium album had larger niche breadth than other species, in absolute advantage position in the community, to harm of farmland is serious. The result will provide the scientific basis for weed control and reasonable rotation sequences.