广西木圭锰矿区复垦效果及生态恢复治理对策

Reclamation Effects and Ecological Restoration Countermeasures of Mugui Manganese Mine in Guangxi

广西木圭锰矿历经数十年露天开采，生态环境遭到严重破坏。通过对复垦区的桉树林、水稻田、花生地、木薯地的土壤进行营养状况和重金属含量的检测分析，总结了前阶段取得的复垦效果，探讨了复垦区的重金属污染情况及生态恢复途径。结果表明，复垦区土壤为强酸性土壤，土壤肥力较低，土壤中镉的含量为2．30～4．46mg·kg^-1，超过了土壤环境质量三级标准的2～4倍。针对该矿区的环境现状，提出了生态恢复治理对策和建议。

The ecological environment has been damaged severe- ly after decades of mining in Mugui Manganese mine. Based on the detection and analysis of the nutritional status and heavy metal content of the soils form eucalyptus forest, paddy field, peanut land and cassava land in the reclaimed areas, the a- chieved reclamation results in the previous phase was summa- rize,the situation of heavy metal poilution in the reclaimed area and ecological recovery approaches was discussed. The results showed that the soil in reclaimed land is rather strong in acidity, is lower in fertility~ its cadmium content is 2. 30 - 4. 46 rag/kg,which exceeds the three level of environmental quality standards of soil by 2 to 4 times. In view of the current situation of environment in the mining area, some countermeasures and suggestions in ecological restoration of environment for the mine were put forward.