Chin J Plan Ecolo ›› 1982, Vol. 6 ›› Issue (4): 320-329.

• Research Articles • Previous Articles     Next Articles

The Effect of Cadmium, Lead, Zinc in Soil and Their Interaction on Crop Plants

Ren Jikai, Chen Qinglang, Chen Lingzhi, Han Rongzhuang, Yao Yiqun, Kong Fanzhi, Miao Yougui   

  • Published:1982-04-10
  • Contact: Lin Peng

Abstract: Pot culture experiment were carried on. Cadmium (CdCl2),Lead(Pb(CH3•COO2)) and Zinc (ZnSO4) were added to sandy loam drab soil (pH8.2) respectively, it was found that the contents of cadmium in various organs of plant were several times to 500 times to the control. Under the condition of cadmium concentration at less than 5 and 10ppm in soil, some vegetables and rice were contaminated and their yields were decreased. Lead was accumulated mainly in root and the effect of the lead pollution in soil on plants was relatively low. Zinc was accumulated mainly in leave and root. When the concentration of zinc in soil was less than 200ppm, the growth of rice was inhibited. But there had no influence on dry crops at this concentration. The uptake of cadmium by plant was increased when the lead was added to the soil with 1 or 5ppm of cadmium, but the cadmium ill soil reduced the content of lead in plant. As the results of the interaction between cadmium and zinc or lead and zinc, the uptake of these elements by rice increased but the high concentration of zinc in soil of dry land reduced the uptake of lead and cadmium by plant. In order to assessment the contamination of heavy metal in soil, the concentration of heavy metal and their chemical forms in soil should be studied. To reveal the interaction between heavy metal in soil is an important aspect for assessment of soil pollution.