Effect of Water-Retaining Agent on Growth and Development of Three Local Legumes on Lead-Zinc Tailings of Lanping

Effect of water-retaining agent on growth and development of three local legumes were studied, in order to provide science basis for revegetation of lead-zinc tailings in Lanping. Testing survival numbers and moisture and proline content in plants, aim at revealing effect of water-retaining agent on plants under drought stress. The results show that water-retaining agent can prolong survival time of plants and keep stability of moisture and proline content in plants under drought stress. Survival numbers and moisture content of plants leafs decrease with prolonging drought stress time, and proline content of plants leafs increase with prolonging drought stress time. There was no significant difference of survival numbers and moisture and proline content in plants on tailings soil with 0.3% and 0.4% water-retaining agent, so 0.3% water-retaining agent was best dosage in tailings soil for revegetation of lead-zinc tailings in Lanping.