›› 2004, Vol. 12 ›› Issue (1): 60-65.DOI: 10.11733/j.issn.1007-0435.2004.01.014

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A Preliminary Study on Kobresia Meadow Degradation Forecast Model

LIU Wei, ZHOU Li, ZHOU Hua-kun, WANG Xi   

  1. Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, 810001, China
  • Received:2003-04-17 Revised:2003-06-11 Online:2004-02-15 Published:2004-02-15

嵩草草甸退化预测模型的初步研究

刘伟, 周立, 周华坤, 王溪   

  1. 中国科学院西北高原生物研究所, 西宁, 810001
  • 作者简介:刘伟(1965- ),男,山西运城人,博士,主要从事草地退化、害鼠数量控制方面的研究
  • 基金资助:
    国家"十五"科技攻关项目(2001BA606-02);中国科学院西北高原生物研究所知识创新工程领域前沿项目

Abstract: The study takes a meadow’s secondary productivity to assess if it is degrading,and takes the amount of the meadow’s aboveground biomass or rate of high-quality grass yield as the major factors that influence the secondary productivity.The benchmark that denotes the transitional period of a meadow’s degradation is that its biomass of high-quality grass falls with an annual speed of 1%~5%.The result shows that normally it takes 51 years,the longest,for a plot of meadow to degrade severely and the shortest 10.2 years to deteriorate seroiusly.At present,the annual average degradation rate of the total Qinghai meadow acreage is 2.42%.

Key words: Grassland science, Grassland degradation, Forecast model, Kobresia meadow

摘要: 以次级生产力作为衡量草地退化的标准,以生物量或优良牧草比例作为影响次级生产力的主要因子,建立嵩草草地退化预测模型;以优良牧草生物量下降1%~5%的速度预测不同程度退化草地之间的过渡时间,结果表明:未退化草地演替至重度退化草地所需时间,最长为51年,最短仅10.2年。目前,青海省草地的平均退化速度为2.42%。

关键词: 草原学, 草地退化, 预测模型, 嵩草草甸

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