河北省农用地利用集约度时空变异分析

我国人多地少, 农用地集约利用成为社会经济发展的客观要求。本文以河北省县( 市) 为 评价单元, 从投入强度、利用程度、利用效率和持续状况四个层面构建评价指标体系, 采用熵值法 确定指标权重, 综合指数法计算1985~2005 年河北省各县( 市) 的农用地集约度, 并进行农用地利 用集约度的时空变异分析, 以期为河北省农用地集约利用和持续发展提供政策依据。结果表明: 土地投入强度对农用地集约利用水平的影响较大, 各县( 市) 农用地集约利用水平表现出明显的 区域性差异, 农用地的投入强度和持续状况都表现出提高的趋势, 而农用地的利用程度和利用效 率则有所下降。

Spatial- tempor al Var iance of Agr icultur al Land Use Intensity in Hebei Province

It is urgent to improve the agricultural land use intensity owing to more people and less land resources. Taking counties in Hebei province as evaluation units, an index system was established from four aspects: land investment degree, utilizing intensity, utilizing efficiency and sustainable development status. The weight of each index was calculated by the entropy method. The agricultural land use intensity during 1985～2005 was calculated by employing the methods of comprehensive index, and the spatial- temporal variance of the agricultural land use intensity was analyzed also in order to provide a basis of policy for intensive and sustainable use of agricultural land in Hebei province. The results show that the agricultural land use intensity was prone to be influenced by land investment degree and took on obviously territorial differences. The agricultural land investment degree and sustainable development status increased during 1985～2005, while the utilizing intensity and efficiency decreased.