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以甘肃省啤酒大麦原种场耕地为例,利用GIS,通过土壤图和土地利用现状图叠置划分评价单元,系统聚类与Delphi法相结合筛选参评因素,层次分析法(AHP)确定其权重,模糊评判法确定耕地地力等级,甘肃省啤酒大麦原种场耕地等级共分5级,其中一等地11.35 hm2,二等地192.27 hm2,三等地205.05 hm2,五等地194.42 hm2,分别占总耕地面积的1.88%、31.88%、34.00%、32.24%。耕地土壤养分含量普遍较低,并且不同等级耕地的土壤养分含量状况存在一定的差异性。
Taking Gansu Province, the original barley field of beer barley in Gansu Province as an example, GIS was used to divide the evaluation units by using soil map and land use status map. The system clustering was combined with Delphi method to screen parameters of participation, AHP to determine its weight, Fuzzy evaluation method to determine the grade of arable land, Gansu Province, the original barley beer barley cultivated land level is divided into five levels, including first-class 11.35 hm2, second 192.27 hm2, third 205.05 hm2, fifth, 194.42 hm2, respectively, total The cultivated land area is 1.88%, 31.88%, 34.00% and 32.24% respectively. Soil nutrient content of cultivated land is generally low, and soil nutrient content of different grades of cultivated land there are some differences.