土壤中镉、铅、铜、锌复合污染生态效应的研究

A study on the Ecological Effects of Joint Pollution of Cd,Pb,Cu,Zn in Soil

本文着重研究了土壤中镉、铅、铜、锌复合污染对春小麦、水稻产生的生态效应。研究结果表明,土壤中镉、铅、铜、锌复合污染浓度达到一定程度时,会抑制作物生长,降低产量,并在作物体内累积。随着复合污染浓度的增加,作物生长量下降,而累积量上升,皆呈直线相关。复合污染中各元素的生态效应与它们单因子时不同,这是由于各元素间存在着多种作用机制。

This paper reports the ecological effects of the joint pollution of Cd,Cu,Zn , Pb in soil on spring wheat and rice. The results show that when the joint concentration of Cd,Pb,Cu,Zn in the soil reaches a certain level,the growth of the crops will be inhibited and the yields reduced with the higher the concentration the lower the yields. The content of the four elements in the crops is also increased when the concentration of those four elements in soil increased. The results suggest that the joint pollution is different from single contamintor pollution,because of the complex action mechanism a-mong the joint elements.