安徽贵池地区富硒土壤地球化学特征及开发利用潜力

为了解安徽贵池地区富硒土壤特征与潜力，服务当地富硒土地资源开发，选择贵池西部开展土壤地球化学测量试验，探讨Se、I等有益元素的富集特征、成因及潜力，Cd、As等有害元素的超标特征及成因等，结合研究区土壤中有益、有害元素特征，讨论富硒土地资源及其开发优势。发现表层和深层土壤中Se等有益元素含量总体较高，其中Se含量达到富硒土地标准的表层土壤点位占全部样品点位的76%;表层土壤中Cd含量超标的点位占48%，其他有害元素仅个别点位超标，Cd是制约该地区富硒土地资源开发的主要不利因素。在研究区圈定了61.4 km2的富硒土地资源，认为研究区东部土壤富硒的物质来源是二叠系灰岩，可以利用当地灰岩提升富硒土地资源品质，降低生态风险。

Geochemical characteristics of selenium-rich soil and its potential development capacity in Guichi area, Anhui Province

To reveal the characteristics and potential of selenium rich soil in Guichi area, Anhui Province, and serve the development of local selenium-rich land resources, soil geochemical survey experiments have been carried out in the west of Guichi area. The enrichment characteristics, origin and potential of beneficial elements such as Se and I, and the exceedance characteristics and origin of harmful elements such as Cd and As were incorparated in discussing the development advantages of Se-rich land resources. It is found that the content of Se and other beneficial elements in surface and deep soil was generally high, among which the sites with Se content of topsoil meeting the standard of Se rich soil accounted for 76% of all sample sites, and the sites with Cd content of topsoil exceeding the standard accounted for 48% of all sample sites, and only a few other harmful elements exceeded the standard. Cd is the main adverse factor restricting the development of Se-rich land resources in this area. The 61.4 km2 selenium-rich land resources were delineated in the study area. It is believed that the source of selenium-rich soil in the eastern part of the study area is Permian limestone, which can be used to improve the quality of selenium-rich land resources and reduce ecological risks.