城市地质2024，Vol.19Issue(4)：475-482,8.DOI:10.3969/j.issn.2097-3764.2024.04.007
北京生态涵养区土壤硒含量背景值研究
Study on background value of surface soil Se content in ecological conservation area of Beijing
摘要
Abstract
Taking the surface soil(0-20 cm)in the ecological conservation area of Beijing as the research object,a total of 8 188 surface soil samples were collected and the content of selenium in these samples was determined by atomic fluorescence spectrometry.Methods of correlation analysis and multivariate statistical analysis and GIS technology were used to study the distribution characteristics of selenium content in the surface soil.Their background values in different soil types,its dependence on soil pH and land type were also explored.The results show that the value of soil selenium content in the surface soil samples is 0.223 mg·kg-1,which is higher than the geometric mean of selenium content in Beijing(0.19 mg·kg-1).The distribution of selenium in surface soil shows a good inheritance of parent material.Coarse bone soil(0.251 mg·kg-1)and soil in mining land(0.221 mg·kg-1)that are closely related to the parent material of the soil show significant selenium enrichment.The distribution of selenium content in surface soil varies greatly at different pH levels.The background value of selenium content in alkaline surface soils is generally lower(≤0.214 mg·kg-1),while in medium to acidic surface soils is generally higher(≥0.242 mg·kg-1),which shows a negative correlation between selenium content and pH value.关键词
土壤/硒/背景值/生态涵养区Key words
soil/selenium/background value/ecological conservation area引用本文复制引用
张群,冯辉,孙朝,李启云,姜天琪,贾磊..北京生态涵养区土壤硒含量背景值研究[J].城市地质,2024,19(4):475-482,8.基金项目
北京生态涵养地区地质环境综合调查(PXM2018_158307_000005)资助 （PXM2018_158307_000005）
