栅格数据支持下的滨海蔬菜主产区耕地质量评价研究——以山东省寿光市为例

以山东省寿光市为例,进行了滨海蔬菜主产区耕地质量的综合评价研究.选取影响寿光市耕地质量的各个因子,以层次分析法(AHP)确定权重,在GIS支持下,以50 m×50 m栅格为评价单元,采用综合评价法对寿光市的耕地进行了耕地质量综合评价,模糊评判法确定耕地质量等级.评价结果表明,寿光市耕地质量情况总体良好,一、二等地占总面积的54.76%;三、四等地占总面积的37.07%;五、六等级仅占8.16%.耕地质量等级由北部沿海向南部过渡,与耕地的集约利用程度呈现明显的正向关系.该研究较好地探索了滨海蔬菜主产区耕地质量的评价技术方法,摸清了耕地集约利用对其耕地质量的影响,对蔬菜主产区耕地资源的持续利用有积极意义.另外,对各个等级耕地的状况进行了分析并提出了相应的利用对策.

Cultivated Land Quality Evaluation Based on Raster Data in Coastal Vegetable Production Area:A Case Study in Shouguang City,Shandong Province

Taking Shouguang City in Shandong Province as a case study, this paper explores the cultivated land quality evaluation based on raster data in coastal vegetable production area. Evaluation factors are chosen by Delphi approach and their weights are determined by AHP method, consequently, comprehensive evaluation method is applied to the cultivated land evaluation and the grades of cultivated land quality are classified by fuzzy discrimination method based on 50 m × 50 mraster data. The result shows that, the cultivated land quality in Shouguang City is good in general with area of the first and the second grades 54.76% of the total area, the third and the fourth grades 37.07%, and the fifth and the sixth grades only 8. 16% of the total area. Cultivated land quality grades have an obvious positive correlation with the intensification of cultivated land use according to their gradual spatial transition from northern coastal area to southern area. This study explores the technical methods of the land quality evaluation based on raster data in coastal vegetable production area and has noticeable significance to the sustainable use of cultivated land resources in intensive agricultural area. Besides, some utilization suggestion is brought out for each grade of cultivated land quality.