内蒙古通辽市科尔沁区土壤硒地球化学特征  

GEOCHEMICAL CHARACTERISTICS OF SELENIUM IN THE SOIL OF HORQIN DISTRICT,INNER MONGOLIA

作　　者：杨立国 马志超[1] 王鑫[1] YANG Li-guo;MA Zhi-chao;WANG Xin(Inner Mongolia Institute of Geological Survey/Inner Mongolia Key Laboratory of Magmatic Mineralization and Ore-Prospecting,Hohhot 010000,China)

机构地区：[1]内蒙古自治区地质调查院/内蒙古自治区岩浆活动成矿与找矿重点实验室

出　　处：《地质与资源》2019年第4期383-388,共6页Geology and Resources

基　　金：中国地质调查局基础调查项目“东北黑土地1∶25万土地质量地球化学调查”“内蒙古通辽地区多目标地球化学调查”(12120113001500)

摘　　要：对通辽市科尔沁区土壤与农作物中硒元素地球化学特征及影响因素的系统研究显示,研究区土壤硒含量水平普遍较低,且空间分布不均,仅局部达到足硒水平.硒元素主要富集在表层土壤中,且与有机碳、Al2O3、TFe2O3、Mn、P等呈正相关关系,表明土壤中有机碳、黏土矿物、铁锰氧化物对硒元素地球化学行为有重要影响.研究区土壤呈碱性至强碱性,富硒农作物并不严格产出在富硒土壤中.因此,开发富硒农产品要综合考虑土壤硒含量、土壤有效态硒含量、农作物硒含量、土壤理化性质及地理景观等因素.A systematic study on the geochemical characteristics and influencing factors of selenium(Se)in soil and crops of Horqin district,Tongliao City,shows that the Se content in the soil is generally low with uneven spatial distribution and only partially reaching the Se-sufficient level.Se is mainly concentrated in surface soil and positively correlated with organic carbon,Al2O3,TFe2O3,Mn and P,showing that the organic carbon,clay minerals and Fe-Mn oxides significantly affect the geochemical behavior of Se.The soil in the study area is alkaline to strongly alkaline.However the Se-rich crops are not strictly produced in Se-rich soil.Therefore,the development of Se-rich agricultural products should comprehensively consider such factors as Se content,available Se content in soil,Se content in crops,soil physicochemical property and geographical landscape.

关 键 词：土壤硒含量 地球化学特征 富硒农作物 通辽市科尔沁区 内蒙古 

分 类 号：S153[农业科学—土壤学]