中文摘要：

采用人口基尼指数、人口重心、相对资源承载力等指标和方法，分析1987—2007年兰州—西宁区域31市县人口集中性和差异性，并计算相对资源承载力大小。结果表明：①兰州—西宁区域总人口和非农业人口集中指数和基尼指数变化趋势相反，其中非农业人口集中指数、基尼指数有增大趋势；②人口重心、经济重心和非农业人口重心三心位置不一致，但是移动方向相似，且经济重心移动的速度最大；③区域范围内人口分布与经济总量高度相关，人口与耕地表现出较弱的正相关性；④兰州—西宁区域人口属于超载状态，但是超载的人口规模在减小；最后将31市县分为超载类型区、富余类型区和临界类型区三种类型区。

英文摘要：

Using population Gini-index, population gravity center and relative resources carrying capacity, this paper analyzed the population concentration and divergence in 1987-2007, and calculated the relative resources carrying capacity of 31 urban and city in Lanzhou-xining region.The results showed that： （1）In Lanzhou-Xining area, population concentrate index and population Gini-index change contrarily to total population and non-agricultural population＇ s. And non-agricultural population concentrate index and Gini index has an enhancing tendency; （2）The population gravity center, economy gravity center and non-agricultural population＇ s gravity center don＇ t match together, but the direction of movement is similar, the speed of economy gravity movement is the fastest; （3）In the region, population distribution is highly correlated with the total economic output, population and cultivated land shows a weak positive correlation; （4）The population in Lanzhou-Xining area is in an overload state, but the overloading population decreases. In the end, the article divides 31 urban and cities into three regions： overloaded region, superabundance region, critical region.