咸阳市耕地质量评价

Quality evaluation of farmland in Xianyang city

本文基于GIS与RS技术,结合咸阳市区域特点,从土壤性质、立地条件、肥力状况和土壤管理四个层面选取指标,构建咸阳市耕地质量综合评价指标体系,对咸阳市耕地质量进行评价与分类,将耕地质量依据评价指数划分为六个等级,对咸阳市耕地基础生产能力进行分析评价。结果表明:一级和二级耕地主要分布在关中平原,约占研究区总耕地面积的20%,三级和四级耕地主要分布在中部偏南地区,占研究区耕地总面积的50%以上,五级和六级耕地主要在分布在北部区域。该研究结果可为咸阳市耕地保护与土地规划提供参考依据。

Based on GIS and RS technology,combined with the regional characteristics of the study area,this paper selects the indexes from four levels of soil properties,site conditions,fertility status and soil management,constructs the comprehensive evaluation index system of cultivated land quality in Xianyang,evaluates and classifies the cultivated land quality of Xianyang,and divides the cultivated land quality according to the evaluation index into six grades,and evaluates the Xianyang cultivated land base capacity.The results show that primary and secondary cultivated land is mainly distributed in Guanzhong plain,accounting for about 20%of the total cultivated land area,three class and four class cultivated land is mainly distributed in the south-central region,accounting for more than 50% of the total area of cultivated land,five and six class cultivated land is mainly distributed in the northern region.The results of this study can provide reference for cultivated land protection and land planning in Xianyang.