The Role of Earthworm in the Ecological Restoration of Mining wasteland of Dexing Copper Mine in China

27 Mar The Role of Earthworm in the Ecological Restoration of Mining wasteland of Dexing Copper Mine in China

View Original

Abstract

为探讨蚯蚓在德兴铜矿废弃地生态恢复中的作用 ,系统地研究了蚯蚓在不同处理尾砂土、复垦土上生长发育状况 , 蚯蚓对铜离子富集作用及植物生长影响。 结果表明: 1)不同比例的铜矿尾砂土中的蚯蚓的存活率差异很大 ,尾矿砂含量 越高 ,存活率越低 ,而且同一类型尾砂土中的蚯蚓随着时间的推移 ,存活率降低。 2)不同类型的复垦土中的蚯蚓的存活率 也有类似现象 ,只是变化幅度较小。 3)不同类型的尾砂土和复垦土中的蚯蚓体重变化 ,随着时间的推移 ,体重逐渐变轻 , 而且尾矿砂含量越高 ,体重下降幅度越大。 ( 4)蚯蚓对铜矿中的铜元素富集能力很强 ,可达体内组织的 82. 5～ 1218. 4 mg kg。 ( 5)尾砂土和复垦土中加入蚯蚓和蚓粪后 ,西红柿的茎长、根长和干重均明显高于对照。 由此还进一步讨论了矿山废 弃地生态恢复的生物 (蚯蚓 )技术理论和方法。

English Abstract

In order to approach the role of earthworm in the ecological restoration of mining wasteland of Dexing Copper Mine in China, the survival rate and biomass of earthworms Eisenia foetida sarigny raised in reclamatation soil and reclamatation soil with tailing sand in Dexing Copper Mine were studied. The results showed the higher mortality and lower weight were found in earthworm population which raised in reclamatation soil with higher content of sands. The copper content of earthworm tissue were 82 5锝1218 4 mg kg after earthworm raised in 90 days. The highest copper content of earthworm tissue accounted for 0 122% of total earthworm tissue. The length of roots and stems and biomass of tomato planted in reclamation soil or reclamatation soil with tailing sand which added with earthworms or earthworm casts were higher than that without earthworm nor earthworm casts. The principles and methods of earthworm technology in the ecological restoration of mine wasteland were also discussed in this paper.