观赏性植物对土壤重金属的修复效果及其环境效应分析——以开封市菊花为例
Study on the remediation effect and environmental benefits of ornamental plants on heavy metal soil: A case study of Kaifeng City chrysanthemum
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摘要: 为了解观赏性植物对土壤重金属污染的修复效果,以开封市5种菊花(金皇后、墨菊、孔雀草、粉旭桃、玛格丽特菊)为研究对象,分析菊花以及土壤样品中镉(Cd)、铬(Cr)、铜(Cu)、铅(Pb)、锌(Zn)等5种重金属元素的含量,分析菊花对土壤重金属的富集、转移能力.采用单因子指数法、内梅罗综合指数法评价土壤环境质量,并采用模糊综合评价法进一步分析菊花带来的环境效益.结果表明,土壤中5种重金属的含量由大到小为:Zn > Pb > Cu > Cr > Cd,土壤重金属为轻度污染,且Cd对综合指数贡献最大;富集能力方面,所选菊花对5种重金属均能够富集;转移能力方面,金皇后的能力最强,其由强到弱的排序为Cr > Cd > Pb > Zn > Cu;环境效益分析,以开封菊花为例,2016-2018年开封菊花日滞尘量、日释氧量、日固碳量随着菊花的增多而增强.Abstract: In order to find out the effect of ornamental plants on the soil heavy metal pollution, five kinds of chrysanthemum, such as Chrysanthemum morifolium, Dendranthema morifolium, Tagetes patula, Dendranthema morifolium and Margaret (Argyranthemum frutescens) are used as analysis object. Analysis of five heavy metal elements of Cd, Cr, Cu, Pb and Zn in chrysanthemum and soil samples. The ability of chrysanthemum to enrich and transfer heavy metals in soil was analyzed. Quality of soil was assessed using the single-factor index method, and the Nemero comprehensive index method, and the environmental benefits brought by chrysanthemum were evaluated using the Fuzzy comprehensive evaluation method. The results showed that the content of five heavy metals in the soil ranked as Zn > Pb > Cu > Cr > Cd, the soil was at the levels of slight pollution, the maximum contribution rates of composite pollution index were Cd. In terms of enrichment ability, selected chrysanthemums had a certain absorption capacity for Cd, Cr, Cu, Pb and Zn, in terms of transfer ability, the Chrysanthemum morifolium had the strongest ability, transfer ability followed the order:Cr > Cd > Pb > Zn > Cu. Analysis of environmental benefits from chrysanthemum in Kaifeng, the daily dust retention, the amount of oxygen released and fixed carbon dioxide content per day of chrysanthemum were enhanced with the increase of the amount of chrysanthemums.
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Key words:
- ornamental plants /
- heavy metals /
- chrysanthemum /
- rmedial effects /
- environmental benefits
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