对应分析在土地利用综合效益评价中的应用

文章以中国31个省、自治区、直辖市为研究单元,从6大方面建立了中国土地利用综合效益评价指标体系,借助Matlab6.5,运用对应分析方法对中国土地利用数据进行分析,得到了更多的土地利用效益指标之间、各省份样本之间及指标与样本之间的相互关系信息。中国土地利用综合效率主要受以农地机械化水平、粮食单产和单位农用地产值为表征的第一主因子和以单位农用地产值、地均产值、建设用地投资强度、建设用地地均产值为表征的第二主因子的控制,土地利用质量与资源丰度方面的因素作用微弱。依据土地利用效益的差异,中国31个省份可分为7类。通过对应分析,可以对控制中国土地利用综合效益的因素及中国各省土地利用综合效率空间分布状况有一个比较准确的了解,以利于对土地利用的不合理之处做出针对性的调整。

Comprehensive Effectiveness Evaluation of Land-use in China Based on Correspondence Analysis

Effectiveness evaluation is the base and starting point for land-use general planning. Taking 31 provinces, autonomous regions and municipalities of China inland as samples, an index system including product effectiveness, quality status, structure status, utilizing level, utilizing intensity, and conditions of resources is set up for comprehensive evaluation of China's land-use. Under the help of Matlab6.5 we used correspondence analysis to characterize the status of comprehensive effectiveness of land-use in China. The conclusions of the study are: 1) China's land-use effectiveness is controlled under the first and the second main factors which express the effects of production effectiveness and utilizing intensity, and the factors of quality status and amount of resources have limited effects on China's land-use effectiveness. 2) Investment increase in construction results in increase of the output from construction land and the decrease of the output from agricultural land, and eventually results in the loss of output of land-use. 3) 31 provinces, autonomous regions and municipalities are assorted into 7 types, and Shanghai, Beijing, Tianjin belong to a high-level type of which two main factors act harmoniously.