地质与勘探2025，Vol.61Issue(4)：789-796,8.DOI:10.12134/j.dzykt.2025.04.010
青海省刚察县沙柳河-哈尔盖河地区土壤质量地球化学评价
Geochemical Evaluation of Soil Quality in the Shaliu River-Haergai River Area of Gangcha County,Qinghai Province
摘要
Abstract
This work aims to address the dual demands of grassland resource development and the green organic livestock industry in Qinghai Province.Taking the Shaliu River-Harergai River area of Gangcha County,a core pastoral region in Qinghai as an example,we conducted the first 1∶50,000-scale geochemical survey and evaluation of grassland soil quality in Qinghai.Following the Geochemical Evaluation Standards for Land Quality(DZ/T 0295-2016),multidimensional geochemical assessment techniques were employed to systematically analyze 12 soil nutrient indicators(pH,organic matter,nitrogen,phosphorus,potassium,etc.)and eight heavy metal elements(Cu,Pb,Zn,Cr,As,Cd,Hg,Ni).Soil nutrient levels were classified using the single-index grading method,while environmental risk assessment of heavy metals was performed based on the Nemerow comprehensive pollution index.A"nutrient-environment"matrix overlay model was applied to delineate comprehensive soil geochemical quality grades,enabling precise soil quality evaluation.Results indicate that first-grade(excellent)soils dominate the study area,covering 591.73 km2(98.59%of the total area),followed by second grade(good,0.02 km2),third grade(moderate,8.42 km2,1.40%),and fourth grade(poor,0.03 km2),with no fifth grade(inferior)soils detected.These findings demonstrate the region possesses high soil quality and favorable geochemical conditions for organic livestock production,which also fills the gap in 1∶50,000-scale soil data for Qinghai's alpine pastoral ecosystems.关键词
地球化学评价/土壤养分/土壤环境/土壤质量/刚察县/青海省Key words
geochemical evaluation/soil nutrients/soil environment/soil quality/Gangcha County/Qinghai Province分类
天文与地球科学引用本文复制引用
杨映春,韩思琪,魏有宁,相守其..青海省刚察县沙柳河-哈尔盖河地区土壤质量地球化学评价[J].地质与勘探,2025,61(4):789-796,8.基金项目
青海省省级地质勘查专项资金项目"青海省刚察县沙柳河-哈尔盖河地区1∶5万土地质量地球化学评价"(编号:2023085019jc019)资助. （编号:2023085019jc019）
