武汉市耕地占用与经济增长脱钩研究

Decoupling between Cultivated Land Occupation and Economic Growth in Wuhan

借助DPSIR模型建立耕地占用与经济增长的"经济发展驱动力—耕地占用压力—耕地存在状态—耕地占用影响因素分析—耕地保护政策响应"系统,运用IPAT方程脱钩计算法和变化量综合分析法定量评价了近10年来武汉市域和区域耕地占用和经济增长的脱钩时空演变特征。结果表明:武汉市域尺度2003-2012年耕地占用与经济增长呈"扩张性复钩—强脱钩"的周期性变化;武汉市各区尺度2007-2012年扩张性复钩区由中心城区向远城区转移;影响建设占用耕地的因素主要包括耕地资源的自然条件差异、区位经济优势的差异和政策的导向。政府应制定差别化的耕地保护措施和土地调控政策,才能有效遏制武汉市建设占用耕地的态势。

Based on DPSIR model, the system of cultivated land occupation and economic growth ＂economic development driving force-pressure of cultivated land occupation-condition of cultivated land-analysis of influencing factors for cultivated land occupation-cultivated land protection policy＂was built. By using IPAT and variation comprehensive analysis method, the spatio-temporal variation of decoupling between cultivated land occupation and economic growth in Wuhan was analyzed. The result shows that firstly in municipality scale, during 2003-2012, the relationship between cultivated land occupation and economic growth was changed from expansion negative decoupling to strong decoupling; secondly,in district scale,during 2007-2012, the expansion negative decoupling area was transferred from central city to suburban areas; thirdly, policy response and influencing factors of cultivated land occupation and eco- nomic growth from different scales in Wuhan were analyzed by using relevant factor analysis method. In order to insure the sustainable development of economic growth and cultivated land conservation, government at all levels should strengthen the management in cultivated land occupation and intensive utilization.