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生态学杂志 ›› 2004, Vol. ›› Issue (3): 149-151.

• 技术与方法 • 上一篇    下一篇

土壤线虫三种分离方法效率比较

毛小芳, 李辉信, 陈小云, 胡锋   

  1. 南京农业大学资源与环境科学学院, 农业资源与生态环境研究所, 南京, 210095
  • 收稿日期:2003-02-13 修回日期:2003-05-20 出版日期:2004-06-10
  • 基金资助:
    教育部留学回国人员科研启动基金(教外司留[2001]345号);人事部留学回国人员科技活动择优资助经费资助(宁人字[2002]44号)

Extraction efficiency of soil nematodes by different methods

MAO Xiaofang, LI Huixin, CHEN Xiaoyun, HU Feng   

  1. College of Resources and Environmental Sciences, Institute of Agricultural Resources and Eco-Environment, Nanjing Agricultural University, Nanjing 210095, China
  • Received:2003-02-13 Revised:2003-05-20 Online:2004-06-10

摘要: 比较了蔗糖离心浮选法、改进的贝尔曼漏斗法和浅盘法对土壤线虫的分离效率。蔗糖离心浮选法分离得到的线虫总数分别为贝尔曼漏斗法的6.1倍和浅盘法的11.4倍。而且离心浮选法分离得到的虫体大于53μm(>300目)和53~40μm(300~400目)的线虫数显著高于贝尔曼漏斗法和浅盘法。离心浮选法对所有功能类群线虫(包括食细菌、食真菌、植食和杂食线虫)的分离效率也均显著高于其他2种方法。贝尔曼漏斗法的分离效率高于浅盘法,主要反映在食细菌线虫和虫体在40~32μm(400~500)的线虫数。但在达到相同分离效率时,浅盘法比贝尔曼漏斗法需要的时间短.

关键词: 黄瓜, 光强, 高锰, 光合作用, 叶绿素荧光

Abstract: Extraction efficiency of soil nematodes by density (sucrose) centrifugation,modified Baermann funnel and shallow dish methods was compared.The total numbers of nematodes extracted by centrifugation method were 61 and 114 times higher than those by Baermann funnel and shallow dish methods,respectively.Nematodes of body size more than 53 μm(>300 mesh) and between 53 μm and 40 μm (300~400 mesh) extracted by centrifugation method were also significantly higher than those by Baermann funnel and shallow dish methods.In addition,centrifugation method was more effective for the extraction of all functional groups of nematodes (including bacterial-feeding,fungal-feeding,plant-feeding and omnivorous nematodes) than Baermann funnel and shallow dish methods.Baermann funnel method showed higher extraction efficiency than shallow dish method,and the difference was reflected in the numbers of bacterial-feeding nematodes and the nematodes with body size between 40 μm and 32 μm (400~500 mesh).However,shallow dish method was faster than Baermann funnel method when reaching similar relative extraction efficiency.

Key words: Cucumber, Light intensity, Excess Mn, Photosynthesis, Chlorophyll fluorescence

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