甘肃省啤酒大麦原种场耕地地力评价研究

Evaluation of Cultivated Land Fertility on Beer Barley Seed Farm of Gansu Province

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 beer barley seed farm of Gansu Province as the research area,overlay method between soil map and land use map were adopted to produce evaluation units,evaluation factors were chosen by Delphi approach and cluster analysis with their weights determined by AHP method.Finally the grades of cultivated land fertility were evaluated by fuzzy discrimination method.According to the integrated fertility index of all the evaluate units,cultivated land fertility on beer barley seed farm of Gansu Province was classified into five grades.The area and percentage of the first,second,third,fourth and fifth grade were 11.35 hm2（1.88%）,192.27 hm2（31.88%）,205.05 hm2（34.00%） and 194.42 hm2（32.24%）,respectively.The soil nutrient status was primarily evaluated according to the classification criterion of soil nutrient of Gansu Province.The results showed that soil nutrients content on beer barley seed farm of Gansu Province was lower in general.