摘要
在GIS及计算机技术的支持下,利用土壤图、土地利用现状图及行政区划图叠置划分法确定评价单元,选取立地条件、土壤养分状况、耕层土壤理化性状、土壤管理等4个方面12个评价因子,建立耕地地力评价体系及模型。以重庆市梁平县为研究区,采取专家打分和特尔斐法确定各评价因子的隶属函数,运用层次分析法和模糊数学方法对耕地地力进行综合评价,并就其空间分布进行了分析。另外,还对研究区水田和旱地分别进行地力评价,并对其评价结果及空间分布进行了对比分析,以进一步了解研究区的耕地地力状况。结果表明:在该县775.6km2耕地中,一至八等地分别占耕地8.04%,9.08%,11.93%,17.15%,18.03%,14.84%,12.56%,8.38%。另外,其水田和旱地的耕地地力表现出一定的相似性,但也存在显著的差异性。
Based on the geographic information system （GIS） and computer technology, and confirmed the evaluation unit by the method of overlapping soil distribution map, land utilization map and administrative division map, then selected twelve factors from five aspects as land growing situation, soil nutrient condition, physical and chemical characteristics of the topsoil and land management, established the evaluation system and evaluation model of land productivity. This research regarded Liangping county of Chongqing as study area, and ascertained the membership function by Delphi method, carried out a comprehensive evaluation by analytical hierarchy process （AHP） and Fuzzy Mathematics, and then also analyzed its spatial distribution. Except that, land productivity evaluation of paddy field and dry land was carried out separately, and then took a comparative analysis on the evaluation results and spatial distribution in an effort to study its difference more deeply. The results showed that 775.6km^2 cultivated land, the productivity of the grade first to eighth account for 8.04%, 9.08%, 11.93%, 17.15%, 18.03%, 14.84%, 12.56%, 8.38%. In addition, the productivity of paddy field and dry land showed some comparability, whereas also showed remarkable difference.
出处
《中国农学通报》
CSCD
北大核心
2009年第18期420-425,共6页
Chinese Agricultural Science Bulletin
关键词
耕地地力评价
地理信息系统
空间变异
evaluation of cultivated land productivity, GIS, variability
