基于GIS的新疆县级耕地地力评价研究

目的]采用综合指数法对库车县耕地地力进行评价.方法]在GIS支持下,应用第二次土壤普查资料及成果,利用新疆库车县土壤图、土地利用现状图叠加划分法确定评价单元7 352个,采用模糊评价、特尔斐法、层次分析法等,选取了土壤管理、物理及剖面性状、化学性状等3个方面12个影响因子,结果]全县 73 553.52 hm~2耕地可分为6级,其中一级地7 713.07 hm~2、二级地20 526.13 hm~2、三级地14 621.53hm~2、四级地11 987.8 hm~2、五级地11 302.33 hm~2、六级地7 402.53 hm~2,分别占库车县耕地总面积的10.49;、27.91;、19.88;、16.3;、15.37;和10.06;.结论]建立耕地地力评价体系及其模型.

Research on Evaluation of Soil Fertilities of Farmland at County Level in Xinjiang based on GIS

Objective and Method]Based on the geographic information system(GIS) and the second general survey soil,overlaying the current landuse map with the basic farmland protection map and the soil map,forming 7 352 patches, which are used as the basic management and evaluation cells.This research selected twelve influencing factors from three aspects such as soil nutrient content,profile situation and land management,and the evaluation system and model of farmland fertility was built up. Thegrade of arable land productivity was formed according to the theory of Fuzzy Mathematics, Telphi Principle and Analytic Hierarchy Program,and the farmland fertility of Kuche county and analysis of its spatial distribution were evaluated.Result and Conclusion]The results suggest that 73 553.52 hm~2 farmlands could be divided into six grades,the grade one was 7 713.07 hm~2,the grade two was 20 526.13 hm~2,the grade three was 14 621.53 hm~2,the grade four was 11 987.8 hm~2,the grade five was 11 302.33 hm~2 and the grade six was 7 402.53 hm~2,the fertility of grade one to six account for 10.49%,27.91%,19.88%,16.3%,15.37%,10.06% respectively.