Effect of Heavy Metal Cd,Cr,Pb,Zn on Growth of Wheat

Using method of water culture plant, researched the effect of heavy metals (Cd,Cr,Pb,Zn) on initial stages of growth of wheat(7days after the first two leaves had grown).The indexes included the content of chlorophyll, and the concentration of heavy metals in wheat. The result showed that, lower concentration of heavy metals did not effect the production of chlorophyll, but higher concentration did. But different heavy metal had different effect on chlorophyll production, when Pb and Cr had stronger effect than Cd and Zn. When the concentration of heavy metals increased, the concentration of heavy metal in the wheat increased. But the absorption ability for wheat was different for different heavy metals. Pb and Cr were more strongly absorbed than Cd and Zn.