基于GIS的青海省县级耕地地力评价研究  

GIS Evaluation of Integrated Soil Fertilities of Cultivated Lands in Qinghai Province

作　　者：李月梅[1] 杨文辉[1] 韩燕[1] 

机构地区：[1]青海省农林科学院土壤肥料研究所,青海西宁810016

出　　处：《河南农业科学》2011年第9期66-69,共4页Journal of Henan Agricultural Sciences

基　　金：国家"十一五"科技支撑计划项目(2006BAD05B07)

摘　　要：采用GIS技术和层次分析法、综合指数法等,对青海省乐都县耕地地力进行科学评价。结果表明,全县24 982.44hm2耕地可分为5级,其中,一等地IFI(地力综合指数)>0.814,面积为858.29hm2,占总面积的3.44%;二等地IFI 0.660～0.814,面积3 621.80hm2,占14.5%;三等地IFI 0.455～0.660,面积8 002.61hm2,占32.03%;四等地IFI 0.390～0.455,面积9 236.56hm2,占36.97%;五等地IFI<0.390,面积3 263.85hm2,占13.06%。并采用归纳法,建立了包含立地条件、理化性状和土壤管理等地力要素的乐都县耕地地力评价指标体系。GIS technology,layer analysis method and integrated fertility index evaluation method were applied to evaluate the soil fertilities of the cultivated lands in Ledu county, Qinghai province. The result showed that the cultivated farmland of 24 982.44 ha in the whole Ledu county was divided into 5 grades. The integrated fertility index（IFI） of the cultivated land at the first grade was bigger than 0. 814,and its area was 858.29 ha,accounting for 3.44%of the total cultivated area;the IFI of the cultivated land at the second grade was 0. 660--0. 814,and its area was 3 621.80 ha,accounting for 14.5% of the total area;the IFI of the cultivated land at the third grade was 0. 455--0. 660 and its area was 8002.61 ha,accounting for 32.03%of the total area;the IFI of the cultivated land at the forth grade was 0. 390--0. 455 ,and its area was 9 236.56 ha,accounting for 36.97% of the total area; the IFI of the cultivated land at the fifth grade was less than 0. 390, and its area was 3 263.85 ha, accounting for 13.06%of the total area. By applying the induction method,the evaluation index system of integrated soil fertilities of the cultivated land in Ledu county was established, including the site condition, physical and chemical characters and soil management

关 键 词：地理信息系统(GIS) 青海 耕地地力评价 指标体系 

分 类 号：S1[农业科学—农业基础科学] F301.5[经济管理—产业经济]