黑龙江省克山县土壤-作物系统硒元素地球化学特征  

GEOCHEMICAL CHARACTERISTICS OF SELENIUM IN THE SOIL-CROP SYSTEM OF KESHAN COUNTY,HEILONGJIANG PROVINCE

作　　者：张哲寰[1,2] 赵君[1,2] 宋运红[1,2] 贺鹏飞[1,2] 魏明辉[1,2] ZHANG Zhe-huan;ZHAO Jun;SONG Yun-hong;HE Peng-fei;WEI Ming-hui(Shenyang Center of China Geological Survey,Shenyang 110034,China;Key Laboratory of Black Land Evolution and Ecological Effects,CGS,Shenyang 110034,China)

机构地区：[1]中国地质调查局沈阳地质调查中心,辽宁沈阳110034 [2]中国地质调查局黑土地演化与生态效应重点实验室,辽宁沈阳130024

出　　处：《地质与资源》2020年第6期585-591,555,共8页Geology and Resources

基　　金：中国地质调查局“兴凯湖平原及松辽平原西部土地质量地球化学调查”项目(编号DD20190520).

摘　　要：黑龙江省克山县是我国克山病区.通过分析土壤表层(0~20 cm)样品809件,深层(150~200 cm)样品205件,对不同类型土壤中微量元素Se的含量、有效态含量、农作物籽实Se含量特征进行了研究.结果显示:土壤表层Se元素含量平均为0.249×10^-6,低于全国平均值,高于世界、和东北平原黑龙江省土壤平均值,土壤表层Se含量以足硒为主要特征,足硒土壤面积达93.95%;土壤深层Se含量平均为0.167×10^-6,明显低于土壤表层,Se含量不足或缺Se土壤面积占62.62%;不同类型土壤表层Se含量由高到低顺序为黑钙土=草甸土>黑土>暗棕壤,深层Se含量由高到低依次为暗棕壤>黑土>草甸土>黑钙土,与土壤表层高低顺序相反;不同土地利用类型Se含量显示建设用地和耕地Se含量较高,林地和水利用地含量较低,反映Se含量受人类活动影响明显;玉米、大豆、水稻主要农作物籽实Se含量平均为0.033×10^-6,呈低Se特征.Keshan County in Heilongjiang Province is the place after which the endemic Keshan disease was named.By analyzing 809 topsoil samples(0-20 cm)and 205 deep-soil samples(150-200 cm),the paper studies the characteristics of selenium(Se)content in soil and crop seeds and available Se content by different soil types.The results show that the average Se content in surface soil is 0.249×10^-6,lower than the national average and higher than that of the world and Heilongjiang Province in Northeast China Plain,mainly characterized by Se-sufficiency,with the area accounting for 93.95%.The average Se content in deep soil is 0.167×10^-6,obviously lower than that in surface soil,with the Se-low and Se-deficient soil areas making up 62.62%.The Se content in surface layer of different soil types from high to low is chernozem and meadow soil(the same),followed by black soil and dark brown soil.On the contrary,the Se content in deep layer is dark brown soil,black soil,meadow soil and chernozem in order.The Se content of different land use types show that the Se content in construction land and cultivated land is high,that in forest land and water conservancy land low,indicating the Se content is obviously affected by human activities.The Se content in seeds of main crops such as maize,soybean and rice is 0.033×10^-6 averagely,showing the characteristics of low-Se.

关 键 词：土壤 硒含量 籽实 地球化学 克山县 黑龙江省 

分 类 号：S154.4[农业科学—土壤学] P595[农业科学—农业基础科学]