基于人粮关系的土地资源承载力研究——以甘南藏族自治州为例

The land carrying capacity based on man-grain relationship——A case study of Gannan Tibetan Autonomous Prefecture

利用土地资源承载力(CLC)与土地资源承载指数(ILCC)模型,定量评价了年甘肃省甘南藏族自治州1997—2006年土地资源承载力的变化.结果表明,1997—2006年甘南州人粮关系趋于盈余;土地资源承载力中间虽有波动,但总体呈上升趋势;土地资源承载能力与土地资源利用强度密切相关;人口总量的变化与土地资源承载力变化趋势基本相同.

With the increase of population,land carrying capacity and food safety have been attracted great attention worldwide.From the point of man-grain relationship,by land carrying capacity（CLC） and the land carrying capacity index（ILCC） models,this paper quantitatively analyzes the spatial-temporal dynamic patterns of land carrying capacity of Gannan Tibetan Autonomous Prefecture between 1997 and 2006.The result shows that：the land carrying capacity of Gannan Tibetan Autonomous Prefecture gradually rises with average annual growth of 9.2% from 1997 to 1999,but declines with average annual growth of-3.5% from 1999 to 2002;from 2002 to 2006 the land carrying capacity of Gannan Prefecture gradually rises with average annual growth of 6.2%.The land carrying capacity of Gannan Tibetan Autonomous Prefecture is closely related to the use intensity of grassland resources.