基于层次分析方法的耕地适宜性评价

结合样本区土地利用现状,从耕地的土壤、生态、经济适宜性3方面,选取9个指标构建指标体系,并采用AHP方法确定各指标权重,以农户生产耕地地块为评价单元,结合GIS进行耕地适宜性评价。结果表明:在现有农业投入水平下,现状耕地质量不一致,其中不适宜耕地可以预留为建设用地;部分荒地和田坎可以转变为耕地。影响因子的确定和权重值的计算对耕地适宜性评价结果影响很关键,虽然层次分析方法具有较强的可操作性,但是主观性强易导致评价结果出现误差,需要一定的改进。

Cultivated Land Suitability Assessment with Analytical Hierarchy Process

Based on land use status in sample plot, 9 indicators were selected to construct evaluation system from three aspects of soil, ecolo- gy and economic suitability. AHP method was used to determine weight of each index. With farmers＇ cultivated land as evaluation unit, com- bined with GIS, farmland suitability evaluation was conducted. The results showed that current cultivated land is inequitable and the unsuitable farmland can be reserved for construction land ; some parts of wasteland and dike can change into cultivated land. Determination of influencing factors and calculation of weight are crucial in the assessment process. Although AHP method has strong operation ability, it should be im- proved as the result of subjectivity to avoid errors.