Abstract: A leaching experiment was conducted to study the release characteristics of heavy metals in the Pb/Zn tailings from Hezhang County of Guizhou Province, and the effects of the leachate on the growth of plant seedlings. With the increasing time of leaching, the contents of Cu, Zn, Pb, and Cd in the leachate had a decreasing trend, with their concentrations being 0.038-2.509, 0.0001-0.850, 0.040-0.605, and 0.004-0.021 mg·L^-1, respectively. Cd and Pb were the main components in the leachate. At early stage (days 1-5), the leachate had significant inhibitory effects on the growth of seedling’s roots and buds; but at late stage (days 20-25), the inhibitory effects decreased. Among the test plants, cabbage had the strongest resistance capability, followed by rape, and ryegrass.

Key words: Microtus fortis, Population dynamics, Dongting Lake region, Forecast