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作 者 ：肖玉,谢高地,安凯

期 刊 ：生态学报 2003年 23卷 11期 页码：2367~2378

关键词：青藏高原；土壤保持；土壤侵蚀；通用土壤流失方程；

Keywords:Qinghai Tibet Plateau, soil retention, soil erosion, the universal soil loss equation,

摘 要 ：在 GIS手段支持下 ,运用通用土壤流失方程 ( USLE)研究了青藏高原生态系统土壤保持功能 ,并评价了其经济价值。研究表明 ,在总面积为 1 .49× 1 0 8hm2的青藏高原林地、草地、沼泽和农田生态系统上 ,土壤保持总量为 3.77× 1 0 8t/a,其经济价值总计为 5 .5 9× 1 0 8RMB/a,占西藏和青海两省 (区 ) 2 0 0 0年种植业、林业和牧业收入的 6.1 7%。其中保持土壤养分的经济价值为 3.68× 1 0 8RMB/a,减少废弃土地的经济价值为0 .2 6× 1 0 8RMB/a,减少泥沙淤积的经济价值为 2 .0 0× 1 0 8RMB/a。由此可见 ,青藏高原生态系统服务功能对当地社会和经济发展有着重要的作用。

Abstract:Soil conservation is one of the basic functions provided by terrestrial ecosystems. Its importance has been increasingly recognized in recent years. The development of quantitative estimation of soil erosion supports an effective way to study the contribution of soil conservation functions of ecosystems. In view of the increasing degradation of soil, this article examines the economic values and the soil conservation functions from ecosystems in Qinghai Tibet Plateau (QTP). The soil conservation functions...

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