【摘要】 通过浙西常山地区表层土壤的调查研究,发现大面积富硒土壤,总结了该地区表层土壤硒含量分布特征。研究区内表层土壤硒含量均值为0.44×10^-6;不同土壤类型硒含量差异较大,其中石灰（岩）土土类硒含量最高,平均值为0.58×10^-6;不同母质条件形成的土壤硒含量差异较明显,全新世洪冲积物形成的土壤硒含量最高,平均值为0.59×10^-6。概率累积曲线表明,常山地区外源输入组分对土壤硒的影响小。土壤硒含量与V、Mo、Ni、Cr、S、Cu、Cd等含量呈显著正相关性（P<0.01）,与有机质关系密切（r=0.35）,而与土壤pH相关性不明显。西阳山组泥灰岩、荷塘组炭质页岩、硅质岩及宁国组炭质页岩等岩石硒含量较高。土壤硒继承了岩石硒,硒含量高的岩石分布面积广是形成富硒土壤的重要原因。更多还原

【Abstract】 Through the investigation and study of surface soil in Changshan County,western Zhejiang Province,a large area of selenium-rich soil was found,and the distribution characteristics of selenium were summarized. The mean amount of selenium in the surface soil in the study area is 0.44×10^-6,and different soil types obviously have different amounts of selenium. The amount of soil selenium of the lime（ rock） soil is the highest,with the average value being 0.58×10^-6,and different parent materials obviously have different amounts of selenium. The amount of soil selenium content in Holocene flood alluvium is the highest,with the average value being 0.59×10^-6. The probability accumulation curve shows that the exogenous input components in Changshan have little effect on soil selenium.The amount of soil selenium is closely related to the values of V,Mo,Ni,Cr,S,Cu and Cd（ P<0.01）,and is also closely related to organic matter（ r = 0.35）,with no significant correlation with soil pH. The selenium values of marlstone in Xiyangshan Formation,carbonaceous shale and siliceous rock in Hetang Formation and carbonaceous shale in Ningguo Formation are relatively high. Selenium in soil inherits selenium in rocks. The wide distribution of selenium-rich rocks is the important reason for the formation of selenium-rich soils.更多还原