江苏土地利用综合效益空间分异研究

SPATIAL DIFFERENTIATION OF COMPREHENSIVE LAND USE EFFICIENCY IN JIANGSU PROVINCE

研究江苏土地利用效益空间分异特征对制定差异化土地利用战略从而实现全省土地资源的合理利用与调控,促进区域之间以及社会、经济与生态环境的协调发展具有重要作用。首先建立了以土地利用综合效益为总目标,土地利用社会效益、经济效益和生态环境效益为子目标,包括22个评价因子的土地利用综合效益评价指标体系。在此基础上,采用多因素加权综合评价法,对江苏省各县(市)进行了土地利用综合效益及协调度评价,根据两者的组合状态将江苏分成高效协调区、中效基本协调区和低效基本协调区三大类型区。整体上看,土地利用综合效益及协调度有从南到北逐渐降低的空间分异特征,其中社会经济发展水平是引起土地利用综合效益和协调度差异的主要原因。针对不同类型区域应实行不同的土地利用战略及相关政策来促进区域之间、社会经济与生态环境之间的协调发展。

As the basement of reasonable land use and adjustment, evaluation of land use efficiency is important for coordinative development among regions and socioeconomic and eco-environment in Jiangsu Province. Firstly, the evaluation indicator system of comprehensive land use efficiency is established, which consists of 22 evaluating indicators and three sub-goals of social efficiency, economic efficiency and eco-environment efficiency. Then the weighted multiple-factors synthetic appraisement method is applied to the evaluation of comprehensive land use efficien- cy. Simultaneously, the coordinated degree among the three sub-goals is also analyzed. Based on the relative value, comprehensive efficiency and coordinated degree are classified into three grades of high, moderate and low. According to the combination status of comprehensive efficiency and coordinated degree of each county or city, the whole province is divided into three types, i. e. land use area with high efficiency and coordinated degree, land use area with moderate efficiency and basic coordinated degree and land use area with low efficiency and basic coordinated degree. On the whole, comprehensive efficiency and coordinated degree decreased gradually from south to north, which was caused mainly by socioeconomic development level. Based on the results,Jiangsu Province should make different land use strategy and relative policies to promote the coordinative development among regions and socioeconomic and eco-environment.