康县耕地资源时空演化及优化研究  

Study on the spatial and temporal evolution and optimization of cultivated land resources in Kang County

作　　者：江翀 张其成[1] JIANG Chong;ZHANG Qi-cheng(College of Hydrology and Water Resources,Hohai University,Nanjing 210098,China)

机构地区：[1]河海大学水文水资源学院,南京210098

出　　处：《湖北农业科学》2023年第9期31-37,共7页Hubei Agricultural Sciences

基　　金：国家自然科学基金项目(52209031)。

摘　　要：以甘肃省陇南市康县为例,基于1985—2020年土地利用数据,采用土地利用转移矩阵、耕地利用动态度和核密度分析法分析了康县耕地资源的时空变化特征,并引入聚耕比指数和坡耕地特征指数进行康县耕地资源的分区优化分析。结果表明,总体上康县耕地面积逐年减少,平均坡度下降,耕地主要转出为林地,转化为耕地的土地利用类型主要为建设用地和林地;研究区内坡度在15°及以上的耕地资源总量减少最大,1995—2000年耕地数量大幅减少,2000—2020年耕地总体数量变化不大;耕地资源减少频率和幅度最大的地区主要分布在研究区的东北部以及中部;耕地资源增加频率和幅度最大的地区主要分布在研究区的东南部与西南部;耕地资源较为紧缺地区主要分布在研究区的北部以及南部,耕作难度高的地区主要分布在研究区的北部和东南部,耦合的耕地资源优化类型中耕地限制区最多,最少的为产业转型区。Taking Kang County,Longnan City,Gansu Province as an example,based on land use data from 1985 to 2020,the spatial and temporal change characteristics of cultivated land resources in Kang County were analyzed by using land use transfer matrix,dynamic attitude of cultivated land use and nuclear density analysis,and zoning optimization analysis of cultivated land resources in Kang County was carried out by introducing poly-tillage ratio index and sloping land characteristic index.The results showed that,in general,the cultivated land area and the average slope of Kang County were decreasing year by year,the cultivated land was mainly transferred into forest land,and the land use types converted to cultivated land were mainly construction land and forest land.The total amount of cultivated land resources in the study area with slopes equal to or higher than 15°had decreased the most,the amount of cultivated land decreased significantly between 1995 and 2000,and the overall amount of cultivated land did not change much between 2000 and 2020.The areas with the highest frequency and magnitude of decrease in cultivated land resources were mainly located in the northeastern and central of the study area;the areas with the highest frequency and magnitude of increase in cultivated land resources were mainly located in the southeastern and southwestern of the study area.The areas with a shortage of cultivated land resources were mainly distributed in the north and south of the study area,and the areas with high difficulty in cultivation were mainly distributed in the north and southeast of the study area.Among the coupled cultivated land resource optimization types,the cultivated land restriction area was the most,and the industrial transformation area was the least.

关 键 词：土地利用 时空演变 耕地资源优化 康县 

分 类 号：F301.21[经济管理—产业经济]