基于GIS和熵值法的农用地利用效率评价

Research on Regional Disparity Evaluation of Agricultural Land Use Efficiency

以广西县(市)为评价单元,构建涵盖农用地综合效益、单项农用地效率、农用地利用程度和农用地投入程度4个层面17个指标的评价指标体系,采用熵值法确定指标权重,运用GIS技术把广西各县(市)农用地利用效率划分为五个级别,对各个级别的区域农用地利用效率进行客观综合评价。重点分析各个级别农用地利用效率的区域差异及产生差异的原因,就各级农用地利用效率现状提出一些相应的对策和建议,以期为提高广西县域农用地利用效率及其可持续利用提供参考。结果表明:单项农用地效率中的耕地效率对农用地利用效率水平的影响最大,其次是农用地利用程度,各县(市)的各评价指标及农用地利用效率水平表现出明显的区域差异性。

Scientific evaluation of agricultural land use is the basis for efficient use of agricultural land.Taking counties in Guangxi Zhuang Autonomous Region as evaluation units,an index system was established from four aspects： comprehensive benefit of agricultural land,single agricultural land utilizing efficiency,agricultural land utilizing degree and agricultural land investment degree.The weight of each index was calculated by the entropy method,dividing agricultural land use efficiency of Guangxi counties into five levels by using GIS technology to conduct an objective,comprehensive evaluation individually.An analysis was focused upon about various levels of agricultural land use efficiency concerning regional differences and the causes of the differences,according to the levels of agricultural land use efficiency situation and some corresponding countermeasures and suggestions were put forward in order to improve land utilization efficiency and sustainable utilization for references.The results show that agricultural land use efficiency was prone to be more influenced by single agricultural efficiency of cultivated land use efficiency,then came to the agricultural land utilizing degree,and each county of the evaluation index and land utilizing efficiency levels obviously present territorial differences.