Effects of mine tailings in the zinc and lead mine wasteland on seedling ecesis of Leucaena glauca
铅锌矿废弃地尾矿砂对银合欢幼苗定居的影响

The effects of mine tailings in the Pb and Zn mine wasteland on seedling ecesis of Leucaena glauca are studied. The results showed that heavy metals Pb,Zn,Cu,Cd are stored in the mine tailings of zinc and lead mine wasteland. Absorbing capacity and concentrating volume of seedling to heavy metals were bigger, and content in the root was highest. Contents of the nitric and ammoniacal nitrogen stored in the mine tailings are lower. The seedling of Leucaena glauca could be grown in the environment, but it impaired development and growth. The plant dry weight of biomass was lowered, plant height changed short, complex leaves were decreased in number, pigment content of photosynthetic biomembranes was reduced. First of all, owing to heavy metal content is highest, activity of the root system reduced, restricting plant to absorb water and nitrogen. Effects of the soil infertile is second.