Acta Agrestia Sinica

›› 2011, Vol. 19 ›› Issue (5): 884-888.DOI: 10.11733/j.issn.1007-0435.2011.05.029

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Effects of Fertilization on Niche of Main Plant Species in Maqu Alpine Desertification Meadow

CHEN Zi-xuan1, TIAN Fu-ping2,3, ZHENG Yang3   

  1. 1. Institute of Biotechnology, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu Province 730070, China;
    2. Lanzhou Institute of Animal and Veterinary Pharmaceutics Sciences CAAS, The lanzhou Scientific Observation and Experiment Field Station of Ministry of Agriculture for Ecological System in Loess Plateau Areas, Lanzhou, Gansu Province 730050, China;
    3. Pratacultural College of Gansu Agricultural University, Lanzhou, Gansu Province 730070, China
  • Received:2011-03-16 Revised:2011-07-05 Online:2011-10-15 Published:2012-07-12

施肥对玛曲高寒沙化草地主要植物种生态位的影响

陈子萱1, 田福平2,3, 郑阳3   

  1. 1. 甘肃省农业科学院生物技术研究所, 甘肃兰州730070;
    2. 中国农业科学院兰州畜牧与兽药研究所农业部兰州黄土高原生态环境重点野外科学观测试验站, 甘肃兰州730050;
    3. 甘肃农业大学草业学院, 甘肃兰州730070
  • 通讯作者: 田福平,E-mail:tianfp@163.com
  • 作者简介:陈子萱(1975- ),女,博士,助理研究员,研究方向为植物生态生理,E-mail:chenzxv@163.com
  • 基金资助:
    甘肃省科技攻关项目(2GS052-A41-007-03);国家自然科学基金项目(30900177);基本科研业务费(1610322011013)资助

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Abstract: This study investigated the primary plant species in Maqu alpine desertification meadows using the quadrat sampling method.Specifically,the importance value,niche breadth and niche overlap of the species were reported.Results showed that Stipa aliena Keng was a dominant species of Maqu alpine desertification meadow after fertilization for two years with an average importance value was 0.31.The major weed was Thalictrum alpinum L.with the largest niche breadth(0.993) and also showed the greatest competitive ability and ecological adaptability.The biggest niche overlap value was 0.995 occurred between Scirpus pumilus Vahl and Euphorbia esula L..The niche overlap value between Stipa aliena Keng and Thalictrum alpinum L.was 0.993 ranked as second highest.Fertilization enhanced gramineous grasses growth,causing forb weeds to gradually lose dominance in Maqu alpine desertified meadow.

Key words: Fertilization, Alpine desertified meadow, Importance value, Niche breadth, Niche overlap

摘要： 采用样方法对施肥处理的玛曲高寒沙化草地进行了生态位特征的调查,计算了主要植物的重要值、生态位宽度和生态位重叠值。结果表明:对玛曲高寒沙化草地施肥第2年后,草地优势种为异针茅(Stipa aliena Keng),其重要值平均为0.31。高山唐松草(Thalictrum alpinum L.)生态位宽度为0.993,具有最大的竞争力,生态适应性较强,是草地的主要杂草。最大的生态位重叠发生在矮藨草(Scirpus pumilus Vahl)和乳浆大戟(Euphorbia esula L.)之间,生态位重叠值为0.995;其次是异针茅与高山唐松草之间,生态位重叠值为0.993。施肥使禾草类生长旺盛,杂草类的优势地位逐渐失去。

关键词: 施肥, 高寒沙化草地, 重要值, 生态位宽度, 生态位重叠值

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