江苏省土地利用“生产-生活-生态”功能变化与耦合特征分析

土地作为生产、生活和生态（简称“三生”）功能的综合载体，对其功能进行定量评价和耦合协调特征分析是土地利用冲突识别、国土空间优化配置等的重要基础。以江苏省为研究区，基于“三生”功能内涵解析，采用多尺度融合数学模型，构建了集成行政单元和格网尺度的综合评价指标体系，以2005、2015年为研究断面，应用耦合协调度模型计算了江苏省“三生”功能的耦合协调度。研究结果表明：（1）江苏土地利用生产和生活功能有较大提升，增幅分别为13.79%、21.72%，但空间差异显著，苏南各市县占比最高，苏中次之，苏北普遍较低；生态功能均有所下降，总减幅为6.03%；（2）江苏土地利用“三生”功能耦合协调度类型区划分为良好协调区、中级协调区、初级协调区、次级协调区和低级协调区5种类型；良好协调区和中级协调区均有所增加；初级协调区占比增加22.05%，且增幅最大；次级协调区占比减少33.91%，且减幅最大；低级协调区占比均最低。（3）江苏“三生”功能耦合协调水平时空分布特征显著，苏南耦合协调水平最高，苏北耦合协调水平变化最大，省域总体从初级协调损益水平提升为初级协调同步水平。本研究实现了在区域层面进行多尺度融合的土地利用“三生”功能评价，可为土地利用冲突识别提供一定的方法参考。

“Production-Living-Ecological” Function Evaluation and Coupling Coordination Analysis of Land Use in Jiangsu Province

Land is the comprehensive carrier of production, living and ecological function (abbreviated as PLEF), and it should be the important foundation to conduct land quantitative evaluation and coupling and coordination characteristics analysis for the identification of land use conflict and the optimization of land space allocation. Based on the connotation analysis of PLEF, applying multi-scale fusion mathematical model, this research constructs the evaluation index system of PLEF, integrating both of the administrative unit scale and the grid scale, and the apply coupling coordination model to quantitatively calculate the coupling coordination degree in the study area of Jiangsu Province from 2005 to 2015. The result showed: (1) Land use production function (PF) and living functions (LF) in Jiangsu had been greatly improved from 2005 to 2015, for 13.79% and 21.72% respectively, but the spatial distribution differed obviously. PF and LF of the cities and counties in South Jiangsu were the highest, followed was Central Jiangsu, and Northern Jiangsu came the last; the ecological functions(EF) shows, a decline 6.03%. (2) Coupling coordination degree had been divided into 5 levels: well coordination area (WCA), intermediate coordination area (ICA), primary coordination area (PCA), substandard coordination area (SCA) and inferior coordination area (INCA). During 2005 and 2015, WCA and ICA increased by 13.79% and 21.72% respectively. PCA increased the largest by 22.05%, while SCA decreased the largest by 33.91%, separately. In addition, the proportion of INCA came the least by 2.5%.(3) The spatial and temporal distribution characteristics of coupling coordination of PLEF in Jiangsu were significant. South Jiangsu showed the highest coupling coordination level, Northern Jiangsu showed the largest change, and the whole province region put up a promotion of coupling coordination level from SCA to PCA. This research has realized the multi-scale PLEF evaluation at the regional scale, which might provide a reference for the identification of land use conflicts.