宜宾市周家镇土壤剖面中镉含量的研究

Study on cadmium content in soil profile of Zhoujia Town, Yibin City

为了解川南土壤酸化区土壤剖面中总镉与有效态镉含量关系,本文选取宜宾市周家镇的农用地作为研究对象,共采集土壤样品6个,分析了土壤pH值、总镉及有效态镉。通过检测结果确定了研究区重金属镉的超标情况,讨论了土壤剖面中有效态镉与总镉的含量关系及分布。研究结果得出:研究区土壤剖面总镉超标率为83.3%;土壤剖面有效态镉与总镉含量随着深度的增加而减少;总镉含量较高的点位,土壤中有效态镉含量也较高。

In order to understand the relationship between total cadmium and available cadmium in the soil profile of the soil acidification area in South Sichuan,this paper selected agricultural land in Zhoujia Town,Yibin City as the research object,and collected a total of 6 soil samples,and analysed the pH,total cadmium and available cadmium.Based on the test results,the over standard of heavy metal cadmium in the study area was determined,and the relationship and distribution of available cadmium and total cadmium in soil profile were discussed.The results show that the over standard rate of total cadmium in the soil profile is 83.3%,the content of available cadmium and total cadmium in the soil profile decreases with the increase of depth,and the content of available cadmium in the soil is higher at the point with higher content of total cadmium.