基于PSR模型的四川省耕地集约利用评价及分区研究

Cultivated Land Intensive Utilization and Regional Research Based on PSR Model in Sichuan Province

以耕地资源集约利用中的人地关系为依据,构建基于PSR模型的耕地集约利用评价指标体系。结合四川省实际情况,共选取15个评价指标,采用改进的熵值法确定各指标权重,运用综合指数方法分析四川省21个市(州)的耕地集约利用度,并将其划分为高度集约区、中度集约区、一般集约区和不集约区。结果表明:在不同区域间,耕地集约利用水平具有明显差异;平原地区如成都等地的耕地集约利用水平较高,甘孜、阿坝等地较为典型,耕地集约利用水平较低;引起区域差异的主要原因是各市(州)自然条件和社会经济发展程度不同;采用PSR模型、熵值法和综合指数方法评价耕地集约利用水平是合理的,研究结果为四川省耕地集约利用提供进一步指导。

Based on the man-land relationship of cultivated land intensive utilization,the index system of cultivated land intensive utilization based on PSR model was established.Combined with the actual situation in Sichuan Province,A total of15indexes were selected.To calculate the weight of each index,the improved entropy weight method will be used.Then the cultivated land intensive utilization of21cities in Sichuan Province was calculated with comprehensive index method.And it was divided into highly intensive area,moderate intensive area,generally intensive area and non-intensive area.The results indicated that:there were obvious differences in the level of cultivated land intensive utilization between different areas.The level of cultivated land intensive utilization in plain areas such as Chengdu is higher than that in Ganzi and Aba.The main reason for regional difference is that the natural conditions and socio-economic development are different in each city.It is reasonable to evaluate the level of cultivated land intensive utilization by using the PSR model,the entropy method and comprehensive index method.The results will provide a further guidance for cultivated land intensive utilization in Sichuan Province.