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

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 among the joint elements.