The purpose of this paper is to reveal the real mechanism and space differentiation characteristics of urban land use efficiency in the middle reaches of the Yangtze River,what's more,to explore the thought of promotion for urban land use,under the guidance of coordinate,green,open and sharing.In principles of four force dimensions,which are economic growth,social development,resources sustainability and environment friendly degree,we adopted double objective DEA-SBM models which considering the expected output,measuring the land use data from 2001 to 2014.The results showed that the urban land use trend is overall rise and locally down,the land use pattern of ‘ one main and two vice’ is significant,the internal cities are all with high discreteness.What's more,it shows unstable spatial-correlation,the cities generally aggregate in the type of ‘ low-Low and low-high’,and the local unstable factors increase The non-comprehensive effective land use show that pure technical efficiency is effective and scale efficiency is invalid.The results indicate the urban land use is coordinated with society,economy,resources,environment,and regional development level of urban land utilization efficiency is not synchronous.Furthermore,the low level areas hinder the whole development process of land use efficiency.What's more,there is a certain gap between current and optimal land inputs scale.To promote basin land use efficiency,we should establish an unified,open construction land market,take the city groups as an unit,and employ the methods of main function zones,as well as promote resource-flowing and location complementary;what's more,we should maintain the coordination of economy,society,resource and environment,and form the ‘center-core’ city as the main body,and ‘ river basin management-department coordination’ as the means of land use of shaft.%为揭示长江中游城市群土地利用效率的现实机理与时空分异特征,探索区域协调、绿色发展、适度开放、资源共享意义下的城市土地利用思路,以四元作用异样度即经济增长度、社会发展度、资源持续度、环境友好度为效率评价法则,引入考虑非期望产出的双目标DEA-SBM模型,对2001-2014年土地利用数据进行测算.结果表明:城市群土地利用效率整体上升、局部回落,“一主两副”土地利用格局分化显著,城市群内部土地利用效率离散水平较高;土地利用呈现较不稳定的空间正相关性,以低低型和低高型聚集为主,受局部不稳定因素影响的城市逐渐增多;土地利用非综合有效表现为纯技术效率有效而规模效率无效.由此,城市土地利用与社会经济效益、资源环境效益在不断的调和与适应,但区域土地利用效率发展水平并不同步,低效城市阻抑区域土地利用效率的整体发展进程,且土地要素投入规模与最优投入规模之间仍存在差距.为推动流域土地利用效率的提升,建设开放竞争、统一有序的建设用地市场,以城市群为单位进行土地功能分区,外力促进要素流动与区位互补、内力协调经济社会发展与资源环境可持续,形成以“中心+核心”城市为主体、“流域治理+部门协同”为手段的土地利用轴带.
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