| 北京平原区土壤地球化学特征及影响因素分析 |
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| 引用本文： | 李欢,黄勇,张沁瑞,贾三满,徐国志,冶北北,韩冰.北京平原区土壤地球化学特征及影响因素分析[J].物探与化探,2021(2):502-516. |
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| 作者姓名： | 李欢 黄勇 张沁瑞 贾三满 徐国志 冶北北 韩冰 |
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| 作者单位： | 北京市地质勘察技术院;河北地质大学宝石与材料工艺学院;天津华北地质勘查局核工业二四七大队 |
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| 基金项目： | 北京市财政项目“北京市土壤地质环境监测网建设”(PXM2018_158307_000012);“北京市土地质量生态地球化学监测网运行(2021年度)”(PXM2021_158307_000006)。 |
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| 摘 要： | 基于北京平原区土壤地球化学调查数据,运用数理统计、因子分析、相关性分析、回归分析等方法研究了土壤元素的横向和纵向分布特征,并探讨其影响因素。结果表明:北京平原区土壤CaO、MgO、Na 2O、Hg、Cd、Sr、Ba、Sn等含量偏高,Sb、As、Th、W、Br、U、I、Mo、有机质等含量偏低。R型因子分析结果显示,F1因子为反映土壤原始背景特征的元素组合,F2、F4、F6因子为反映人类活动对土壤元素分布特征影响的元素组合,F3因子为反映成土母质基本信息的元素组合,F5因子为反映成土母岩基本特征的元素组合。利用一元非线性回归分析对部分元素的垂向分布特征进行数学建模,回归系数R 2值为0.542~0.960,拟合效果总体较好;从区域尺度上初步判断出人类活动对重金属元素Cu、Hg、Pb、Zn影响深度约150~200 cm,对养分指标N、P、S、Se、有机质影响深度约50~100 cm。一般情况下,褐土中Se、Bi、Li、有机质、Mo、W等39项元素与指标的含量高于潮土,不同土壤质地中As、Cd、Cr、Ni、N、B等29项元素含量的大小关系为:砂质壤土<砂质黏壤土<黏壤土<壤质黏土,耕地土壤中Cd、N、P、有机质含量明显高于林地,中心城区土壤中有害重金属元素、养分指标的含量普遍高于郊区。
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| 关 键 词： | 地球化学特征 因子分析 相关性分析 数学建模 影响因素 |
Soil geochemical characteristics and influencing factors in Beijing Plain |
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| LI Huan,HUANG Yong,ZHANG Qin-Rui,JIA San-Man,XU Guo-Zhi,YE Bei-Bei,HAN Bing.Soil geochemical characteristics and influencing factors in Beijing Plain[J].Geophysical and Geochemical Exploration,2021(2):502-516. |
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| Authors: | LI Huan HUANG Yong ZHANG Qin-Rui JIA San-Man XU Guo-Zhi YE Bei-Bei HAN Bing |
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| Institution: | (Beijing Institute of Geo-exploratin Technology,Beijing 100120,China;School of Gemology and Material Technology,Hebei GEO University,Shijiazhuang 050031,China;Nuclear No.247 Party of Tianjin North China Geological Exploration Bureau,Tianjin 301800,China) |
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| Abstract: | This study was based on soil geochemical survey data obtained in Beijing plain.The methods of mathematical statistics,factor analysis,correlation analysis and regression analysis were used to study the horizontal and vertical distribution characteristics of soil elements,and the influencing factors were discussed.The result shows that the content of CaO,MgO,Na 2O,Hg,Cd,Sr,Ba,and Sn in soil is high and that of Sb,As,Th,W,Br,U,I,Mo and organic matter is low.The result of R-type factor analysis shows that factor F1 reflects the characteristics of the original soil background,factor F2,factor F4 and factor F6 reflect the influence of human activities on the distribution characteristics of soil elements,factor F3 reflects the basic information of soil parent material,and factor F5 reflects the basic characteristics of soil parent rock.The vertical distribution characteristics of elements were modeled by regression analysis.The regression coefficient R 2 is 0.542~0.960,and the effect is good.From the regional scale,it is preliminarily determined that the depth of human activities on Cu,Hg,Pb and Zn is 150~200 cm,and that on N,P,S,Se,and organic matter is 50~100 cm.In general,the content of 39 elements such as Se,Bi,Li,organic matter,Mo and W in cinnamon soil is higher than that in alluvial soil.The relationship between the values of 29 elements such as As,Cd,Cr,Ni,N and B in different soil textures are in order of sandy loam
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| Keywords: | geochemical characteristics factor analysis correlation analysis mathematical modeling influencing factors |
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