UPTAKE RATE OF HEAVY METALS BY PLANTWITH RESPECT TO THEIR CONTENT AND FORMIN SOIL IN THE EAST SUBURBS BEIJING
北京东郊作物对重金属的吸收及其与重金属在土壤中含量和存在形态的关系

The uptake rate of Hg and As of rice is greater than that of wheat. But the uptake rate of Cu, Pb, Zn and Cd of rice is lower than that of wheat, and their order is: Zn> Cd>Cu>As>Hg>Cr>Pb.The sequence of some heavy metals contained in various organs of rice and wheat is as follows: roots>stems leaves>grains. The amount in vegetables also varies with different kinds of vegetable. Pb is obstructed in roots, and is difficult to be transported into stems, leaves and grains. It is easy for Cd to be absorbed into...