丘陵山地地区耕地地力评价研究

摘要：本文以重庆市梁平县为研究区域，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，并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研究区的耕地地力进行综合评价。由于在丘陵山地地区，水田和旱地的种植制度和施肥模式存在显著差异性，这种差异性导致其耕地地力状况也存在显著的差异，因此本研究对水田和旱地分别进行地力评价，并对其结果进行比较分析，进一步研究其差异性。

Evaluation of Cultivated Land Productivity in Hilly Area

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.