广西苍梧县土壤硒地球化学特征及其影响因素研究  

Geochemical characteristics and influencing factor of soil selenium in Cangwu County of Guangxi

作　　者：陈绍强 黄祥林 张冠清 凌绍年 莫达庆 朱春迪 谢杰佳 陈丽菲 CHEN Shaoqiang;HUANG Xianglin;ZHANG Gunaqing;LING Shaonian;MO Daqing;ZHU Chundi;XIE Jiejia;CHEN Lifei(Regional Geological survey&Research institute of Guangxi Zhuang Autonmous Region,Guilin 541003,Guangxi,China)

机构地区：[1]广西壮族自治区区域地质调查研究院,广西桂林541003

出　　处：《矿产与地质》2024年第4期823-830,共8页Mineral Resources and Geology

基　　金：广西壮族自治区财政专项资金项目(任务书编号:桂国土资办〔2018〕69号)资助。

摘　　要：以广西苍梧县土壤为研究对象,系统开展15万表层土壤地球化学调查、岩石剖面测量及农作物调查,研究表层土壤中硒元素的含量特征及其影响因素。研究结果表明,苍梧县表层土壤硒元素平均含量为0.60 mg/kg,硒等级为高的面积为867.87 km^(2),占研究区面积的81.24%。不同土壤类型中,红壤硒的含量最高,平均含量为0.64 mg/kg;淹育性水稻土硒的含量最低,平均含量为0.44 mg/kg;不同地层中,寒武系小内冲组、黄洞口组碎屑岩硒的含量最高;不同土地利用现状中,园地、林地硒的含量最高;不同pH环境中,强酸性环境硒的含量最高,说明不同地层、成土母质和土壤性质组分对土壤硒含量的富集和分布均产生一定影响。苍梧县土壤环境地球化学等级以一等和二等为主,且种植的水稻、玉米和茶叶富硒率均大于70%,具有开发富硒土地及富硒农产品的潜力。The 150000 surface soil geochemical survey,rock profile survey and crop survey are systematically carried out in Cangwu County,Guangxi,the content characteristics and its influencing factor of selenium in surface soil have been studied.The research result shows that the average content of Se in the surface soil is 0.60 mg/kg in Cangwu County.The area rank high selenium levels is 867.87 km^(2),accounting for 81.24%of the study area.Among different soil types,the content of Se in the red soil is the highest,with an average of 0.64 mg/kg.The content of Se in the flooded paddy soil is the lowest,with an average of 0.44 mg/kg.In different strata,the content of Se in Cambrian Xiaoneichong Formation and Huangdongkou Formation clastic rocks is the highest.In different land use situation,the content of Se in the garden and forest is the highest.In different pH environment,the content of Se in the strongly acidic environments is the highest.The enrichment and distribution of soil selenium content are influenced by different strata,parent materials,and soil properties and components.The geochemical grade of soil environment in Cangwu County is mainly first-class and second-class,and the selenium rich rates of rice,corn,and tea planted are all greater than 70%,indicating the potential to develop selenium rich land and selenium rich agricultural products.

关 键 词：硒 土壤地球化学特征 影响因素 广西苍梧 

分 类 号：P595[天文地球—地球化学]