张北典型区土壤硒异常特征及富集因素分析  

Abnormal characteristics of soil selenium and enrichment factors in typical areas of Zhangbei

作　　者：刘继红 张素荣 高学生 张国利 苏永军 刘宏伟 LIU Jihong;ZHANG Surong;GAO Xuesheng;ZHANG Guoli;SU Yongjun;LIU Hongwei(Tianjin Center,China Geological Survey(North China Center for Geoscience Innovation Precambrian Research Centre,China Geological Survey),Tianjin 300170,China)

机构地区：[1]中国地质调查局天津地质调查中心(华北地质科技创新中心),天津300170

出　　处：《华北地质》2025年第1期113-118,共6页North China Geology

基　　金：中国地质调查项目“京津冀鲁耕地区土地质量地球化学调查(DD20160325)”;“河北张家口地区综合地质调查(DD20190820)”。

摘　　要：【研究目的】张北县小二台镇土壤硒元素空间变异显著,局部区域存在表层土壤硒富集,分析土壤中硒的来源及其富集因素,对富硒土地资源的开发具有重要的指导意义。【研究方法】本文以张北县小二台镇土壤地球化学调查数据为研究对象,采用相关性分析、方差分析和GIS空间分析等方法对数据进行处理,分析土壤硒的含量、分布特征和富集因素。【研究结果】结果显示:小二台镇表层土壤Se含量(0.17 mg/kg)高于坝上地区土壤背景值(0.15 mg/kg)。表层土壤硒含量达到天然富硒标准(≥0.3 mg/kg)的面积占比为研究区的8.00%。表层土壤硒富集区主要分布于水系发育区域和水系两侧低洼地带。成土母质、土壤类型及土地利用类型等因素对土壤Se的含量及富集水平均造成了不同程度的影响。除此之外,土壤理化性质也是影响表层土壤Se富集的重要因素。相关性分析表明表层土壤Se与pH值呈极显著的负相关,与有机碳呈极显著线性正相关。【结论】本研究为张北县富硒土地资源的开发和利用提供了有价值的参考。[Objective]The spatial variation of selenium in the soils of Xiaoertai Town,Zhangbei County,is significant,with some areas exhibiting clear surface enrichment.Identifying selenium sources and enrichment factors is crucial for the future development and utilization of selenium-rich land resources.[Methods]This study analyzed the soil geochemistry data of Xiaoertai Town,Zhangbei County,using correlation analysis,variance analysis,and GIS spatial analysis methods to explore selenium content,spatial distribution,and enrichment factors.[Results]The results showed that the content of Se in the topsoil of Xiaoertai Town was (0.17 mg/kg),which was higher than that of the background soil(0.15 mg/kg).The area with selenium content above the natural enrichment standard(≥0.3 mg/kg)accounted for 8% of the study area.Selenium-enriched soils were mainly found in areas along developed river systems and low-lying zones on either side of the rivers.Factors such as parent material,soil type,and land use influenced selenium content and enrichment levels.Correlation analysis revealed a significant negative correlation between selenium and pH,and a significant positive correlation with organic carbon.[Conclusions]This study provides valuable insights for the development and utilization of selenium-rich land in Zhangbei County.

关 键 词：张北 土壤 硒元素 富集因素 

分 类 号：P595[天文地球—地球化学]