江汉平原耕地资源生态安全状况及空间集聚格局  

Ecological Security Condition of Cultivated Land Resources and Spatial Agglomeration Pattern in Jianghan Plain

作　　者：蔡银莺[1] 罗成[1] 

机构地区：[1]华中农业大学土地管理学院,湖北武汉430070

出　　处：《华中农业大学学报（社会科学版）》2015年第5期110-120,共11页Journal of Huazhong Agricultural University(Social Sciences Edition)

基　　金：国家自然科学基金项目"主体功能区空间规划管制下群体福利均衡与农田生态补偿研究"(40901288);国家社会科学基金项目"主体功能区划框架下农田生态环境补偿制度设计及效应--‘两型社会’试验区的实证研究"(09CJY021)

摘　　要：江汉平原是国家重要的商品粮棉油基地及城市化快速扩张的典型地区,研究其耕地资源生态安全状况及空间集聚格局可为保障区域粮食安全及促进耕地资源的合理利用提供参考。运用"隐患―状态―免疫"模型,构建耕地资源生态安全评价指标体系,采用改进型全排列多边形综合图示法和空间自相关法对江汉平原耕地资源生态安全的时空差异特征及空间集聚格局进行分析。结果表明:江汉平原耕地资源生态安全整体水平较低,耕地资源生态安全综合指数为0.228,处于不安全状态,历年耕地资源生态安全综合指数呈波动趋势,耕地生态系统呈不稳定状态;江汉平原各市县耕地资源生态安全空间集聚现象不显著,呈从集聚向离散化扩展的变化趋势,尚未形成较为稳定的空间格局;城市化进程加速和非农用地扩张引起的耕地资源大量流失,是导致目前江汉平原耕地生态安全水平较低的主要原因。Jianghan plain is the important production base of grain,cotton and oil and also the typical region of rapid expansion of urbanization in China.Study on ecological security condition of cultivated land resources and spatial agglomeration pattern in Jianghan plain will give the reference to the guarantee of regional grain security and promotion of reasonable use of land resources.Based on the＂hidden dangers-state-immune＂model and basic theory of ecology,ecological security evaluation index system of cultivated land resources,this paper analyzes the characteristics and spatial agglomeration with different time and space of ecological security of cultivated land resources in Jianghan plain by using modified permutations polygon comprehensive graphic method and spatial autocorrelation method.The result shows that the overall level of ecological security of cultivated land resources in Jianghan plain is very low and its security composite index is only 0.228,which shows that it is in the unsafe condition.The composite index showed a trend of fluctuations over the years and ecological system of cultivated land is in the unstable state.Spatial agglomeration in all cities and counties of Jianghan plain is not significant,the ecological security of cultivated land has come to a tendency of changing from agglomeration to discretization and a relatively stable space structure is still not formed.This paper finally points out that huge loss of cultivated land resources caused by rapid expansion of urbanization is the main reason for the low level of ecological security of cultivated land in Jianghan plain.

关 键 词：耕地资源 生态安全 “隐患―状态―免疫”模型 空间集聚 江汉平原 

分 类 号：F323[经济管理—产业经济]