基于耕地资源信息系统的海口市琼山区耕地地力评价

Cultivated Land Fertility Evaluation in Qiongshan District,Haikou Based on Cultivated Land Resources Information System

为了解海口市耕地质量状况,并为该地区的耕地地力评价提供理论参考,以海口市琼山区为例,运用县域耕地资源管理信息系统,选取排涝能力、成土母质和耕层厚度等共12个指标构建耕地地力评价指标体系,采用模糊数学理论与层次分析法计算耕地地力综合指数,按照累积曲线法划分的耕地地力等级对该地区的耕地地力进行评价。结果表明:琼山区耕地中一级地1713.05hm^2,占耕地总面积的7.05%;二级地6500.50hm^2,占耕地总面积的26.78%;三级地10768.03hm^2,占耕地总面积的44.37%;四级地4418.12hm^2,占耕地总面积的18.20%;五级地870.43hm^2,占耕地总面积的3.59%。

The evaluation index system of cultivated land fertility includes 12 evaluation indexes based on cultivated land resources management information system at county level. The grade of cultivated land fertility in Qiongsha District, Haikou is evaluated by the integrated cultivated land fertility index calculated by fuzzy mathematic theory and AHP to effectively understand cultivated land quality and provide the theoretical reference for evaluation of cultivated land fertility in Haikou. Results： The area of first-grade land, second-grade land, third-grade land, fourth-grade land and fifth-grade land is 1 713. 05 hm2, 6 500.50 hm2,10 768. 03 hm2,4 418. 12 hm2 and 870. 43 hm2,which accounts for 7. 05%, 26. 78% 44.37%, 18.20% and 3. 59% of total cultivated land area respectively.