高钙细粒金铜尾矿复垦植被筛选研究

Research on Plant Selection for Reclamation of Gold and Copper Tailings with High Calcium Fine Grain

以湖北省大冶市某金铜高钙细粒尾矿作为研究对象,研究了原尾矿与改良尾矿作为土壤基质18种不同植物的发芽和生长情况,并进一步评估了植物生长后基质重金属赋存状况,最终筛选出复垦适宜植物组合。研究结果表明:紫花苜蓿等5种植物发芽率高达95%以上,银合欢等5种植物生物量在15 g以上,基质改良能促进植物生长,且植被对重金属有固化作用,最终筛选出银合欢、刺槐、紫穗槐、胡枝子、黄花槐、紫云英、早熟禾、四季青和紫花苜蓿为适合细粒高钙尾矿复垦的草—灌—乔植物组合。

A kind of fine gold-copper tailings with high-calcium in Daye City,Hubei Province was taken as the re-search object,the germination and growth of 18 different plants in the original and modified tailings as soil substrates werestudied. Occurrence of heavy metals of tailings were confirmed and plants suitable for reclamation were selected. The resultsshowed that the germination rate of five plants such as alfalfa was as high as 95% and the biomass of five plants such as Leu-caena was more than 15 g. The substrate improvement could promote plant growth and the vegetation had a solidifying effecton heavy metals. Nine species of plants,including acacia albizzia,were identified as suitable for reclamation in fine goldcopper tailings with high-calcium.