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Acta Prataculturae Sinica ›› 2010, Vol. 19 ›› Issue (5): 186-195.

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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

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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