Effects of Cadmium and Lead in Soil on the Germination and Growth of Rice and Cotton
QIN Pu feng,TIE Bai qing,ZHOU Xi hong,ZENG Qing ru,ZHOU Xi shi (College of Enviroment and Resources,HNAU,Changsha 410128,PRC)
The effects of cadmium and lead in soil on rice and cotton were studied by using pot culture method.The results indicated:The two heavy metals had negative effects on the growth of rice and cotton.Under the treated concentration of Cadmium at ≥20 mg/L or Lead at ≥1 000 mg/L,the growth of rice or cotton seedlings was inhibited,but the germing percentage was not influenced. Under the concentration of Cadmium at ≥20 mg/kg or of Lead at ≥1 000 mg/kg,the growth of rice and cotton was inhibited seriously. Under the same condition the ability of the gen translated cotton for resisting the metal damage is stronger than the common cotton. The higher content of Cadmium or Lead in soil, the more uptake of plants.Compared with cotton's absorbing ability at the same treated level,the absorption of Cadmium,lead in rice leaves,was lower.