广东韶关地区土壤环境背景值及其影响因素  

Analysis on background value of soil elements and influencing factors in Shaoguan, Guangdong Province

作　　者：李婷婷 刘子宁 贾磊 张伟 Li Tingting;Liu Zining;Jia Lei;Zhang Wei(Guangdong Geological Survey Institute,Guangzhou 510000,Guangdong,China;Key Laboratory of Ocean and Marginal Sea Geology,CAS,Guangzhou 510000,Guangdong,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]广东省地质调查院,广东广州510000 [2]中国科学院南海海洋研究所边缘海与大洋地质重点实验室,广东广州510000 [3]中国科学院大学,北京100049

出　　处：《地质学刊》2021年第3期254-261,共8页Journal of Geology

基　　金：广东省生态环境调查项目“韶关市土壤环境质量详查:韶关市土壤背景值调查”(H2017067S)。

摘　　要：土壤元素背景值是土壤环境现状研究的重要内容,查清土壤中元素的含量及分布特征,可为区域环境质量评价、土壤环境标准制定、土地资源优化以及地方性疾病的防治提供科学依据。对广东韶关地区3 969件表层土壤样品中54项元素(指标)进行了研究,并与中国土壤A层背景值及广东土壤A层背景值进行对比。结果表明:韶关地区土壤中聚集了与成矿作用密切相关的元素,并形成高背景场,Mo、I、Br、Ag等元素相对贫乏;成土母质是土壤环境背景值最重要的影响因素,不同母质的土壤元素背景值差异较大;土壤类型及土壤有机质含量对土壤环境背景值有一定的影响,总体来看,黄壤、黄红壤、石灰土为区内大部分元素高背景值土壤类型,红壤与潴育性水稻土的环境背景值大致与全区的背景值相当;赤红壤、紫色土中大部分元素背景值较低,有机质含量与土壤元素背景值呈正相关关系。The background value of soil elements is an important part of the research on the status quo of soil environment. The analysis of the contents and distribution characteristics of soil elements can provide a scientific basis for evaluating regional environmental quality, formulation of soil environmental standards, optimization of land resources, and prevention and control of endemic diseases. The 54 elements(indexes) of 3,969 surface soil samples in Shaoguan area were analyzed in this study. The results, compared with the background values of soil A-layer in China and soil A-layer in Guangdong, show that the soil elements closely related to mineralization are gathered forming a high background field, while the contents of Mo, I, Br, Ag and other elements are relatively low. Further study showed that the parent material was the most important factor affecting the background value of soil environment, and the background value of soil elements varied greatly among different parent materials. Secondly, soil type and soil organic matter content also have a certain influence on soil environmental background value. In general, yellow soil, yellow red soil and lime soil are the soil types with high background value of most elements in the region. The environmental background values of red soil and redogmatic paddy soil are approximately the same as those of the whole region. The background values of most elements in red soil and purple soil were low, while the content of organic matter was positively correlated with the background values of soil elements.

关 键 词：土壤元素背景值 影响因素 广东韶关 

分 类 号：P595[天文地球—地球化学] S159.2[天文地球—地质学]