欢迎访问《中国农学通报》,

中国农学通报 ›› 2017, Vol. 33 ›› Issue (24): 148-153.doi: 10.11924/j.issn.1000-6850.casb16070108

所属专题: 资源与环境 农业生态

• 植物保护 农药 • 上一篇    下一篇

定西地区不同轮作田杂草生态位研究

牛小霞   

  1. 甘肃省农业工程技术研究院 甘肃 武威
  • 收稿日期:2016-07-20 修回日期:2016-09-02 接受日期:2016-09-18 出版日期:2017-09-05 发布日期:2017-09-05
  • 通讯作者: 牛小霞
  • 基金资助:
    国家现代农业产业技术体系建设专项“胡麻产业技术体系”(CARS-17-GW-9);国家自然科学基金“基于APSIM模型的旱地胡麻生长模拟 及产量预测模型研究”(31360315)。

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

摘要: 为明确定西地区不同轮作田的杂草生态位,采用倒置“W”九点取样法,对定西地区不同轮作田苗期杂草进行了调查。利用Levins 生态位宽度指数和Schoener重叠指数对定西地区不同轮作田主要杂草生态位进行分析,明确不同轮作对农田杂草生态位的影响。本研究中,苦苣菜、藜的生态位宽度均最大,在群落中处于绝对的优势地位,对农田危害严重。这些结果可以为农田杂草防治和建立合理的轮作顺序提供依据。

关键词: 土壤酶, 土壤酶, 人工草地, 农田, 土壤理化因子, 农牧交错带

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.