青海湖地区耕地利用变化的动力机制和趋势模型

Population Carrying Capacity of Land Resources in Qinghai Lake Region

根据青海湖地区土地资源和人口现状与特点,估算了该区及各县现实条件下土地资源极限人口承载量和最大适宜人口承载量、草地和耕地所能承担的人口承载量及其比重,结果表明青海湖地区土地极限人口承载总量为6.96×105人,其中耕地为4.84×105人,草地为2.13×105人,承载比率分别为69.44%和30.56%;区域土地最大适宜人口承载总量为3.25×105人,其中耕地为1.81×105人,草地为1.43×105人,承载比率分别为55.82%和44.18%。另外,区域各县土地最大适宜人口承载总量和承载量也存在较大差别,且各县的耕地和草地的承载量也存在差异,适宜人口承载量从大到小依次为:共和>海晏>刚察>天峻。

Based on the analysis of land resources and current population status and the characteristics in the Qinghai Lake region,the ultimate and maximal population carrying capacity of land and the population carrying capacity of cultivated land and grassland and its proportion in each county are estimated.Results show that the ultimate population carrying capacity of land in the region is 695 973,in which cultivated land is 483 720,grassland is 212 703,and the corresponding capacity ratios are 69.44% and 30.56%,r...