市级耕地地力评价汇总校验研究

以安徽省黄山市为例,在GIS(Geographic Information System)支持下,用土壤图、土地利用现状图叠加的方法划分评价单元,采用特尔斐法从立地条件、剖面性状、土壤管理、耕层养分状况、耕层理化性质5个方面共选取14个因子构建评价指标体系,结合层次分析法、隶属函数模型和地统计分析综合评价了黄山市耕地地力等级。在此基础上,就市级与其各县级耕地地力等级差进行了比较研究,并对差异原因进行分析,研究结果表明:市级评价结果与县级评价结果的整体趋势一致,并且实现了不同县级区域间的等级可比性。研究结果对于市级乃至省级耕地地力汇总评价有一定的指导意义。

Study on Calibration of Summary of Municipal Land Fertility Evaluation

Taking Huangshan City where in Anhui Province as a study case,and being supported by the technique of GIS,overlaying analysis of soil map and the current land-use map to form evaluation cells. This research selected fourteen influencing factors from five aspects covering land growing situation ,profile situation,soil management and soil physicochemical property to build up the evaluation model by using Del?phi method,combined with stratification analysis method to evaluate farmland grading of Huangshan City. On this basis,for the difference between the county and municipal level of cultivated land fertility were compared,and analyzed the reason for the difference. Research suggested that the municipal evaluation re?sults consistent with the results of the evaluation of the overall trends in the county,and achieved a level of comparability between the different regions of the county. The result is helpful to guide evaluation of farmland fertility of provincial.