摘要
为探究汾渭盆地池南地区冬小麦籽粒微量元素地球化学特征,采集了池南地区14个地块的冬小麦样品,对每个样品的微量元素含量进行测试,并进行了系统分析.结果表明:相比长三角小麦,池南地区小麦中Cu、Fe、Pb、Hg、Cd含量较低,Mo、Se较高,Zn、B较为接近,依据食品安全国家标准,存在Zn、Cr污染;轻、重稀土之间分馏较轻稀土之间和重稀土之间分馏均大;Ce无明显异常,Eu基本表现为正异常.摄食足量的池南地区小麦可以满足人体对Cu、Zn、Fe、Mo的需求,同时不会摄入过量的Cu、Zn、Fe、Mo、B、Se、∑RExOy及污染物Pb、Hg、Cd、As,但可能存在摄入过量Cr的风险.通过元素富集度分析,推测池南地区土壤硒含量与小麦籽粒中硒含量应该具备线性相关性,且该区小麦达到富硒水平,结合该区土壤Se含量认为池南地区具有发展富硒小麦的潜力.
Abstract
In order to study on trace element geochemical characteristics of winter wheat grain in Chinan area of Fenwei basin,the samples from 14 land plots are collected and the content of trace elements is analyzed.The study result shows that compared with the wheat in Yangtze River Delta,the contents of Cu,Fe,Pb,Hg and Cd in wheat in Chinan area are lower,the contents of Mo and Se are higher,the contents of Zn and B are close.According to the national food safety standards,there is Zn and Cr pollution.It shows the stron-ger fractionation between LREE and HREE.There is no Ce anomaly in wheat,and Eu anomaly is positive.Sufficient intake amounts of wheat in Chinan area can meet the human body's needs for Cu,Zn,Fe,and Mo,while avoiding excessive intake of Cu,Zn,Fe,Mo,B,Se,∑RExOy and pollutants of Pb,Hg,Cd,As,but there may be a risk of excessive intake of Cr.Through element enrichment analysis,it is speculated that there should be a linear correlation between the soil selenium content and the selenium content in wheat grains in Chinan area,and that the wheat in this area has reached a selenium rich level.Combined with the soil Se content in this area,it is considered that Chinan area has the potential to develop selenium rich wheat.
基金项目
国家重点研发计划专项(2021YFC2902003)
山西省地勘基金项目(HXCT01-2018F005)
NETL
NSTL
万方数据