栾树对湘潭锰尾矿土不同处理方式下植被修复盆栽实验

发布时间：2018-05-05 10:03

本文选题：锰矿废弃地 + 栾树　；参考：《环境科学学报》2017年07期

【摘要】：锰矿废弃地植被修复可促进矿区生态环境的改善和经济的可持续发展,植被修复方法和技术措施对锰矿废弃地的修复至关重要,混合基质中尾泥和尾渣的配置比例与配置方式也是提高植物存活率的关键技术措施.本研究采用栾树进行锰矿废弃物(尾泥和尾渣)盆栽试验,探讨不同混合比例处理方式下锰尾矿废弃物的特性以及栾树对重金属锰的植物修复效果.结果表明:(1)锰矿尾泥呈酸性,尾渣呈碱性,尾渣中全Mn和有效Mn含量高于尾泥,二者混合基质的p H值和全Mn含量则随着尾渣含量所占比例的增加而升高,但有效Mn含量则逐渐降低.(2)不同比例的尾泥和尾渣混合基质可以有效改善土壤的物理性质,提高栾树的存活率和改善植物的生长状况;随尾泥含量的增加,栾树总生物量增多,生产力提高,当V(尾渣)∶V(尾泥)=3∶1时的栾树生产力与对照土壤中的栾树生产力相当.(3)从栾树各器官的Mn富集量、生物富集系数和转移系数来看,栾树不属于Mn超富集植物,但作为Mn的低积累植物,属于Mn的耐性树种,具有较强的适应性,可用于锰矿废弃地的植物稳定修复.
[Abstract]:The vegetation restoration of manganese ore wasteland can promote the improvement of ecological environment and the sustainable development of economy in mining area. The methods and technical measures of vegetation restoration are very important for the restoration of waste land of manganese mine. The proportion of tailings and tailings in mixed substrates is also a key technique to improve plant survival rate. In this study, a pot experiment of manganese ore waste (tailings and tailings) was carried out by Luan Shu. The characteristics of manganese tailings under different mixed proportions and the phytoremediation effect of Luan Shu on heavy metal manganese were discussed. The results showed that the content of total mn and available mn in the tailings was higher than that in the tailings, and the pH value and total mn content of the mixed matrix increased with the increase of the proportion of the tailings content, the results showed that the tailings were acidic and alkaline, and the contents of total mn and available mn in the tailings were higher than those in the tailings. However, the content of available mn decreased gradually. 2) the mixed substrate with different proportion of tailings and tailings could effectively improve the physical properties of soil, increase the survival rate of Luan tree and improve the growth of plants, and the total biomass of Luan tree increased with the increase of the content of tail mud. The productivity of Luan tree was increased when the productivity of Luan tree was about the same as that of the control soil. The mn enrichment, bioconcentration coefficient and transfer coefficient of each organ of Luan tree were measured. Luan Shu is not a kind of mn super-enriched plant, but as a low accumulation plant of mn, it belongs to the tolerant species of mn, which has strong adaptability and can be used for the stable restoration of plants in manganese ore wasteland.
【作者单位】：中南林业科技大学生命科学与技术学院;南方林业生态应用技术国家工程实验室;湖南会同杉木林生态系统国家野外科学观测研究站;
【基金】：湖南省教育厅创新平台开放基金~~
【分类号】：X173;X753

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