海南省琼中县耕地地力评价研究

Cultivated land productivity evaluation in Qiongzhong County of Hainan Province

以海南省琼中县为研究区域,选取了地貌类型、成土母质、坡度、土壤养分等12个地力评价因子;在构建耕地地力评价指标体系的基础上,采用模糊数学理论确定指标隶属度,借助层次分析法对评价单元的指标隶属度进行加权求和计算地力综合指数,运用累积曲线法对琼中县耕地地力进行了等级划分。耕地地力共划分为4级:一级地844.37 hm2,占总耕地面积的9.73%;二级地3 306.39 hm2,占总耕地面积的38.12%;三级地3 786.85 hm2,占总耕地面积的43.66%;四级地736.24 hm2,占总耕地面积的8.49%。并针对影响琼中县耕地质量的障碍因子提出了改良建议。

This paper take Qiongzhong County of Hainan Province as the study area, 12 tactors were chosen to evatuate cut- tivated lands, including geo-morphological types, parent materials, slope gradient, soil nutrient, etc. The Fuzzy Mathe- matical Approach was used to calculate the membership index, which were then weighted and summed with the Analytic Hi- erarchy Process to evaluate the cultivated land productivity across the county. The results derived from mass curves shown that 8 673.85 hm2 cultivated land could be classified into 4 grades, 1 st grade, 2ed grade, 3rd grade and 4th grade account for 844. 37, 3 306. 39, 3 786. 85 and 736. 24 hm2 respectively. Finally, several soil amelioration measures were suggested ac- cording to the barrier factors in the study area.