广东徐闻土壤中硒元素含量的空间分布特征及其影响因素  

Spatial Distribution Characteristics of Selenium Content in Soils and its Influence Factors in Xuwen,Guangdong

作　　者：张小连 ZHANG Xiaolian(Guangdong Bureau of Coal Geology,Guangzhou,Guangdong 510000)

机构地区：[1]广东煤炭地质局,广东广州510000

出　　处：《中国煤炭地质》2024年第2期74-78,53,共6页Coal Geology of China

基　　金：广东煤炭地质局重点科研项目(中煤江南办函科技[2022]129号)。

摘　　要：通过对广东省徐闻县113个农用地表层土壤样本的采集和分析,探讨该区域内硒含量的空间分布情况以及受到的影响因素。结果表明:该区域耕地土壤中硒元素含量在0.04~0.82 mg/kg,硒含量平均值为0.32 mg/kg;其中暗黄棕壤土壤中硒元素平均水平为最大,达到0.41 mg/kg;从地理区域看,位于南部的南山镇和与其相邻的徐城街道和城北乡硒平均含量明显高于其他乡镇地区,硒含量分别为0.51,0.41,0.42 mg/kg。不同母质类型的土壤中硒元素含量明显不同。滨海冲积物的平均硒含量最高,达到0.35 mg/kg,其次为玄武岩开发的耕地,平均硒含量为0.30mg/kg。综上,土壤类型和土壤母质可能是影响硒含量分布的重要因素。This study investigated the spatial distribution of selenium content and its influencing factors in the topsoil of 113 agricultural land samples collected from Xuwen County,Guangdong.The results indicated that selenium content in cultivated soils in the region ranged from 0.04 to 0.82 mg/kg,with an average of 0.32 mg/kg.The highest average selenium level was observed in the dark yellow brown soil(0.41 mg/kg).Geographically,the average selenium content in the southern areas,including Nanshan Town,Xucheng Street,and Chengbei Township(0.51,0.41,and 0.42 mg/kg),was notably higher than in other townships.The content of selenium in soils of different parent material types varied,with coastal alluvial soil having the highest average selenium content(0.35 mg/kg),followed by cultivated land developed from basalt(0.30 mg/kg).Comprehensive analysis suggested that soil type and parent material may be important factors influencing selenium content distribution.

关 键 词：富硒土壤 空间分布 土壤类型 土壤母质 影响因素 

分 类 号：P641.3[天文地球—地质矿产勘探]