吉林省农田重金属含量及其在作物中的累积

Content of Heavy Metals in Farmland Soil and Accumulation in Crops in Jilin Province

摘要:

为研究吉林省农田及相应农作物中重金属污染状况,采集了26个县(市)97个土壤样品及相对应的农作物样品进行检测。结果表明,大豆田土壤中有1个样品镉含量大于背景值,超标率为6.67%;玉米田中有1个样品铜含量、4个样品镉含量超过土壤环境背景值,超标率分别为1.39%和5.56%;水稻田中各重金属元素含量均低于相应pH条件下的土壤环境标准限制。农作物中,大豆中有4个样品镉含量超标,超标率达到26.7%;玉米中铜含量超标的有1个样品,镉、汞含量超标的各有3个样品,超标率均达到4.17%;水稻中各重金属元素含量均在标准值之内。土壤的污染等级属于"清洁"一级。

Abstract:

In order to study the statement of heavy metals in farmland and crops in Jilin Province,97 samples of soil and crops from 26 counties were collected to determine.The results showed that: Cd content of one sample in soybean field was higher than the background,the over-limit rate was 6.67%.Cu content of one sample and Cd content of four samples in maize field were higher than the background.The over-limit rate was 1.39% and 5.56%.Heavy metal content in rice soil was lower than the national standard value.Cd content of four samples in soybean were higher,the over-limit rate was 26.7%.Cu content of one sample and Cd and Hg content of there samples in maize field were higher than the background.The over-limit rate was 4.17%.Heavy mental content in rice were lower than the national standard value.The environment level belongs to cleanness.