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基于GIS的县级设施农业区土壤养分综合评价
塔林葛娃12
0
((1青海大学农林科学院,青海西宁810016;2农业部西宁农业环境科学观测实验站))
摘要:
采用GIS技术和层次分析法、综合指数法等,对青海省大通县设施农业区土壤养分进行综合评价。结果表明,全县设施农业区1 588.8 hm2耕地可分为3级,其中,1级地IFI(养分综合评价指数)>0.64,面积为288.3 hm2,占总面积的18.1%;2级地IFI为0.52~0.64,面积1 254.2 hm2,占78.9%;3级地IFI<0.52,面积46.3 hm2,占2.9%。并采用归纳法,建立起包含立地条件、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。
关键词:  地理信息系统(GIS)  耕地地力评价  指标体系  青海
DOI:
基金项目:青海省农林科学院青年创新基金项目“东部设施农业区氮磷累积特征及生态效应评价”(2017-NKY-03);青海省农牧厅科技计划项目“青海省设施农业区农产品产地环境监测项目”(2017-NM-032)。
Comprehensive Evaluation of Soil Nutrients in County-Level Facility Agriculture Area Based on GIS
Talingewa
((1 College of Agriculture and Forestry,Qinghai University,Xining Qinghai 810016; 2 Xining Agricultural Environmental Science Observation Experimental Station,Ministry of Agriculture))
Abstract:
Comprehensive evaluation of soil nutrients in facility agricultural areas of Datong County,Qinghai Province was carried out by using GIS technology,analytic hierarchy process and comprehensive index method.The results showed that the 1 588.8 hm2 cultivated land in the county′s facility agricultural area could be divided into 3 levels,of which the first-level IFI(nutrient comprehensive evaluation index) was >0.64,the area was 288.3 hm2,accounting for 18.1% of the total area;the second-level ground IFI was 0.52-0.64,the area was 1 254.2 hm2,accounting for 78.9%;the third-level ground IFI was<0.52,the area was 46.3 hm2,accounting for 2.9%.Inductive method was used to establish the evaluation index system of cultivated land fertility in Ledu County,including site conditions,physical and chemical properties and soil management.
Key words:  Geographic Information System(GIS)  evaluation of cultivated land fertility  indicator system  Qinghai

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