【摘要】 土地承载力是土地管理和可持续利用的重要研究领域之一,城乡建设用地是土地利用类型的重要组成部分,其结构与布局是否合理对土地可持续利用至关重要.本研究以环鄱阳湖城市群为研究区,进行城乡建设用地开发适宜性评价,核算城乡建设用地可承载临界值,计算可承载城乡建设用地丰度,并与现状城乡建设用地进行空间格局匹配性分析,得到研究区各个县(市、区)的剩余开发强度和空间匹配度.结果表明:研究区城乡建设用地开发适宜性评价结果等级中,最适宜区、较适宜区、较不适宜区和不适宜区面积分别为3130. 62、2477.29、867.03和29509.14 km~2.研究区城乡建设用地可承载临界值(可开发强度)为16.6%,各个县(市、区)的值在7.7%～100%,各县(市、区)可承载城乡建设用地丰度在0.15～1.30.研究区剩余开发强度为12.3%,空间匹配度为0.76;各个县(市、区)剩余开发强度在4.9%～53.5%,空间匹配度在0.11～1.00,地区差异较大.此研究有助于明确现状开发状态与合理开发状态之间的关系,可为城乡建设用地的精细化管理、制定空间格局优化调控政策提供依据.更多还原

【Abstract】 Land carrying capacity is one of the important research fields for land management and sustainable use. Urban-rural construction land is an essential component of land use type,the rationality of whose structure and layout is crucial to the sustainable use of land. Here,we executed the evaluation of the suitability of urban-rural construction land development,accounted the bearable critical threshold of urban-rural construction land,calculated the bearable abundance of urbanrural construction land,and compared with the current urban-rural construction land,analyzed the matching of the space layout,and then obtained the remaining development intensity of each county( city or district) of the Poyang Lake urban agglomeration. The results showed that the most suitable,more suitable,less suitable and unsuitable area about the evaluation results of urban-rural construction land development suitability were 3130. 62,2477. 29,867. 03 and 29509. 14 km~2,respectively. The bearable critical threshold of urban-rural construction land( developable strength)was 16.6%,and the value of each county( city,district) was 7. 7%-100%. The abundance of urban-rural construction land in each county( city,district) was mainly 0.15-1.30. The remaining development intensity was 12.3%,and the spatial matching degree was 0.76. The remaining development intensity of each county( city,district) was 4.9%-53.5%,and the spatial matching degree of each county( city,district) was 0.11-1.00,with a wide range. Our results would help to clarify the relationship between the current development status and the rational development status,which could provide a basis for the refined management of urban-rural construction land and the regulatory policies’ formulation of spatial pattern optimization.更多还原