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作 者 ：王德炉,朱守谦,黄宝龙

期 刊 ：生态学报 2005年 25卷 5期 页码：1057~1063

关键词：贵州；喀斯特石漠化；数量评价；

Keywords:Guizhou, Karst rocky desertification, quantitative assessment,

摘 要 ：由于碳酸盐岩岩性的不同,发育的喀斯特在生态环境因子的组合和质量上有较大的差异,形成了不同的石漠化类型。在大量典型样地调查的基础上,以岩性、小生境种数、小生境组合、裸露石面面积、石砾含量和土壤总量6个因子为指标,通过聚类分析和主成分分析相结合的方法,将喀斯特石漠化分为2大类型,即显性石漠化和隐性石漠化,分析比较了它们的主要特征。同时,分别石漠化类型选择了程度评价指标,用坐标综合评定法和欧氏距离公式建立了石漠化数量评价模型,即石漠化程度指数模型,用石漠化程度指数对样地的石漠化现状进行了评价,将6 4个样地划分为未石漠化,轻度、中度、强度和极强度5个等级。

Abstract:Karst rocky desertification is a special process and phenomenon that transforms a karst area into rocky landscape resulted from almost devoid of soils and vegetation. Different carbonate rocks have different types of weathering, soil pedogenesis and characteristics of hydrology, which leads to making different karst terrains and rocky desertification. Degrees of karst rocky desertification vary differently with changes in the types of disturbance, their intensity, timing, and magnitude. Due to a lack of und...

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