稀土矿山“菌根-油松-耐性蚯蚓”修复土壤效应评价

Evaluation of Rare Earth Mine Vegetation Restoration Based on AHP and Fuzzy Comprehensive Evaluation

以内蒙古自治区白云鄂博稀土露天矿为研究区,采用菌根-油松-耐性蚯蚓协同修复受稀土污染的土壤,通过评价修复效应筛选出不同修复组合的最优方案。将该矿区按开采特征进行植被调查,分别对油松、菌根、耐性蚯蚓和根际土壤进行采样分析,通过层次分析法对不同组合下的菌根-油松-耐性蚯蚓修复土壤复合污染效应做出定性评价,再通过模糊综合评判法将评价中出现繁多的变量和一些试验不确定因素作一个总的定量评价。四种不同菌根接种油松并联合耐性蚯蚓协同修复土壤复合污染的效应由高到低依次为:淡紫丝盖伞Inocybe lilacina>臭黄菇Russula foetens=血红乳菇Lactarius sanguifluus>红网牛肝菌Boletus luridus,评价分数依次为3.2601,2.8001,2.8001,2.4834,表明淡紫丝盖伞+油松+耐性蚯蚓的土壤修复方案效果最佳,菌根-植物-耐性蚯蚓的新技术通过试验表明可以有效提升植物修复土壤的效应。

Taking Bayan Obo rare earth open pit mine in Inner Mongolia Autonomous Region as the study area,mycorrhizal-Pinus tabulaeformis-tolerant earthworm was used to repair the soil polluted by rare earth.The optimal schemes of different repair combinations were selected by evaluating the repair effect.The vegetation in the mining area was investigated according to the mining characteristics.The samples of Pinus tabulaeformis,mycorrhizal,tolerant earthworm and rhizosphere soil were analyzed respectively.The compound remediation effect of mycorrhizal-Pinus tabulaeformis-tolerant earthworm pollution for soil pollute under different combinations was evaluated by analytic hierarchy process,then the fuzzy comprehensive evaluation method was used to make a general evaluation of many variables and some uncertain factors in the evaluation.The results showed that the composite effects of four different mycorrhizas combined with Pinus tabulaeformis and tolerant earthworm were as follows:Inocybe lilacinaRussula foetens=Lactarius sanguifluusBoletus luridus,the comprehensive scores were 3.2601,2.8001,2.8001 and 2.4834,respectively,indicating that remediation scheme of the light purple silk umbrella inocybe lilacina+Pinus tabulaeformis+tolerant earthworm has the best effect.The experimental results show that the new technology of mycorrhizal plant tolerant earthworm can effectively improve the effect of phytoremediation.