三峡库区腹地耕地细碎化空间特征研究——以奉节县为例  

Research on the Spatial Characteristics of Cultivated Land Fragment in the Central Region of the Three Gorges Reservoir Area:a Case Study in Fengjie County,Chongqing

作　　者：郭辉[1] 李阳兵[1] 甘彩红[1] 应弘 

机构地区：[1]重庆师范大学地理与旅游学院地理信息系统应用研究重点实验室,重庆401331

出　　处：《重庆师范大学学报（自然科学版）》2016年第3期51-58,F0002,共9页Journal of Chongqing Normal University:Natural Science

基　　金：重庆师范大学提档升级改革专项(2015);国家社会科学基金(No.15BJL110);重庆市科学技术研究项目(No.cstc2015jcyjB0439);国家自然科学基金委重大国际合作基金(No.41161140352)

摘　　要：以奉节县的27个乡镇为研究区,借助ArcGIS,openGeoDa空间统计分析软件等软件,选取7个能表征耕地细碎化的景观指数,结合主成分分析方法和空间自相关分析法,综合测算耕地细碎化和耕地分布的空间自相关程度,分析了三峡库区腹地奉节县27个乡镇2012年耕地细碎化特征。结果表明:1)耕地细碎化综合指标反映北部乡镇耕地细碎化程度要比南部乡镇低,最严重的是庙湾,其次是尖角、五马、九树、吐祥等乡镇,而耕地分布最为集中的是康坪、三江;2)耕地细碎化度在研究区既局部集聚显著,表现出空间正相关,同时局部离散显著,又具有较强的空间负相关;3)研究区耕地细碎化度表现出较为明显的空间分异格局,呈高-高关联型有青龙、五马、杨坪、新治等4个乡镇,是局部高值集聚类型;高-低关联型是安坪,属局部高值离散类型;低-低关联型有三江、黄井2个乡镇,属局部低值集聚类型。研究结果对转变三峡库区腹地耕地利用方式、优化耕地利用结构、提高耕地利用效率从而促进当地农业生产、确保农业产出及保障库区粮食安全具有重要意义。This paper takes 27 towns of Fengjie county in Chongqing city as the research area,employing such analysis software as ArcGIS and openGeoDa,selecting 7landscape indexes which could represent the characteristics of the fragmentation of the cultivated land,combining them with principal component analysis and spatial correlation analysis,comprehensively calculating the degree of the fragmentation of the cultivated land and the degree of the spatial correlation,and finally,analyzing the characteristics of the cultivated land fragmentation in 2012 of the 27 towns in Fengjie,the hinterland of the Three Gorges reservoir area.Results show that：1）from the aggregative indicators of the cultivated land fragmentation,the fragmentation degree of the cultivated land in the northern township is lower than that of the south.The most fragmented part is Miaowan.Second to it are such towns or townships as Jianjiao Wuma,Jiushu,and Tuxiang;the most concentrated farmland lies in Kangping and Sanjiang;2）In some parts in the research area,the cultivated land is significantly concentrated,showing positive spatial correlation to cultivated land fragmentation;in other parts in the research area,the cultivated land is significantly discrete,showing negative spatial correlation to cultivated land fragmentation.3）The cultivated land fragmentation in the research area shows a pattern of marked spatial difference.In our test,the four towns of high-high correlation,Qinglong,Wuma,Yangping,and Xinzhi,belong to the type of high value concentrated type.The high-low correlation type is Anping,belonging to partial high value discrete type;the low-low correlation type has Sanjiang and Huangjing,belonging to partial low value concentrated type.The results above are significantly important to the transformation of land use patterns in the hinterland of the Three Gorges reservoir area,the structure optimization of cultivated land use and the efficiency improvement of the use of arable land,so as to promote local agricultural production,to ensure a

关 键 词：三峡库区 耕地细碎化 空间特征研究 奉节县 

分 类 号：P967[天文地球—自然地理学] F301.2[经济管理—产业经济]