基于空间聚类的西藏耕地后备资源开发组合模型  

Spatial Clustering-based Model of Exploitation Combination for Reserved Cultivated Land Resources in Tibet

作　　者：杨永侠[1,2] 施彦如 孙婷[1] 孟丹[1] 卜春燕[3] 王旭[1] 

机构地区：[1]中国农业大学信息与电气工程学院,北京100083 [2]国土资源部农用地质量与监控重点实验室,北京100035 [3]甘肃省国土资源规划研究院,兰州730000

出　　处：《农业机械学报》2016年第4期239-247,共9页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国土资源部财政预算项目(2014091109620)

摘　　要：耕地后备资源开发科学合理布局直接影响土地资源可持续利用以及区域生态环境保护。以西藏自治区为研究区,以西藏第二轮耕地后备资源调查评价成果为基础,针对西藏特殊环境,提出基于自然和社会适宜性的西藏耕地后备资源开发适宜性评价模型;并以乡镇为聚类单元,以各乡镇耕地后备资源综合适宜性指数、集中连片指数以及增产潜力指数为变量,考虑空间近邻关系,采用基于图论的SKATER算法进行聚类分析,确定西藏耕地后备资源开发组合。结果显示:依据开发适宜性评价模型,西藏自治区耕地后备资源最适宜、中等适宜和勉强适宜的地块分别占全区耕地后备资源总面积的27.98%、49.09%、22.93%;根据开发组合模型,将具有耕地后备资源的乡镇分为3个组合,分别为近期重点开发、中期适度开发及后期开发区域。此分区结果保持了区块间的近邻关系及行政区界的完整性,为耕地后备资源开发区划提供借鉴,同时为发挥农业规模效益提供了科学依据。Development and layout of the reserved cultivated land resources directly affects the sustainable utilization of land resources and protection of ecological environment. Based on the results of the second round survey of reserved cultivated land resources and targeted at the special environment in Tibet, an exploitation suitability evaluation model of reserved cultivatable land resources in Tibet was presented based on the natural and social benefits. Taking the township level administrative region in Tibet as a unit, clustering variables included each township comprehensive suitability index, continuously concentrated index and yield potential index of reserved cultivatable land resources. Considering the spatial neighbor relationship, the spatial ＂K＂ luster analysis was used by tree edge removal （SKATER） algorithm based on graph theory. The cluster analysis was used to determine the exploitation combination of reserved cultivated land resources in Tibet. The results showed that the exploitation suitability of reserved cultivated land resources included three grades, which were the most suitability area, the medium suitability area and the barely suitability area. The area of them accounts for 27.98% , 49.09% and 22.93% of total area of the study area, respectively. According to the model of exploitation combination, the townships with reserved cultivated land resources were divided into three groups as the recently major development area, medium-term moderate development area and long-term development area, which maintained neighbor relationships between the objects, as well as the integrity of the district territories. Furthermore, the results provided reference for the development partition of reserved cultivated land resources for local governments, and it also provided scientific basis for agricultural economy.

关 键 词：耕地后备资源 适宜性 空间聚类 SKATER聚类 

分 类 号：F301.21[经济管理—产业经济]