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草业学报 ›› 2010, Vol. 19 ›› Issue (5): 186-195.

• 研究论文 • 上一篇    下一篇

干旱荒漠区草地植物群落地上生物量时空分布对地下水的响应

李卫红1,周洪华1,杨晓明2,丁辉3   

  1. 1.中国科学院新疆生态与地理研究所 中国科学院绿洲生态与荒漠环境重点实验室,新疆 乌鲁木齐 830011;
    2.新疆石油学院,
    新疆 乌鲁木齐 830000;
    3.新疆维吾尔自治区水利厅防汛抗旱总指挥部办公室,新疆 乌鲁木齐 830000
  • 收稿日期:2009-10-21 出版日期:2010-05-25 发布日期:2010-10-20
  • 作者简介:李卫红(1958-),女,新疆乌鲁木齐人,研究员,硕士。E-mail:liwh@ms.xjb.ac.cn
  • 基金资助:
    国家自然科学基金(40871059,40901061)和国家“十一五”科技支撑项目(2006BAC01A03-1)资助。

Temporal and spatial distribution characteristics of aboveground biomass of grassland plant communities in an arid area

LI Wei-hong1, ZHOU Hong-hua1, YANG Xiao-ming2, DING Hui3   

  1. 1.Xinjiang Institute of Ecology and Geography, CAS, Key Laboratory of Oasis Ecology and Desert
    Environment, CAS, Urumqi 830011, China;
    2.Xinjiang Petroleum Institute, Urumqi 830000,
    China;
    3.Office of Flood Control and Drought Relief Headquarters, Department of Water
    Resource of Xinjiang Uighur Autonomous Region, Urumqi 830000, China
  • Received:2009-10-21 Online:2010-05-25 Published:2010-10-20

摘要: 分析了塔里木河下游以芦苇为优势种群的草地植物群落地上生物量时空分布特征及其对物种多样性和地下水的响应。结果表明,1)在时间上,2007年群落地上生物量最高,达741.75g/m2;在空间上,群落地上生物量随垂直河道距离的增加显著减少。2)物种多样性与群落地上生物量呈显著正相关。3)地上生物量在地下水埋深<3m时较高,且地上生物量对地下水中的Mg-Cl盐含量最为敏感,群落耐盐上限在5.0g/L左右。

Abstract: The temporal and spatial distribution characteristics of the aboveground biomass of the main constructive species of grassland plant communities in the lower Tarim River and their response to groundwater depth and chemical composition of groundwater were analyzed. The results showed that: 1) The highest aboveground biomass of grassland plant communities was in 2005 (up to 741.75 g/m2); Aboveground biomass in grassland plant communities diminished with increasing vertical distance from the river. 2) There was a significantly linear relationship between diversity indices and aboveground biomass. 3) Aboveground biomass of grassland plant communities was highest when the groundwater depth was less than 3 m. The upper limit of salt-tolerance of grassland plant communities sensitive to Mg-Cl salt, was about 5.0 g/L.

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