| 李文略,金关荣,骆霞虹,安霞,李苹芳,朱关林,陈常理.不同红麻品种的土壤重金属污染修复潜力对比研究[J].农业环境科学学报,2018,37(10):2150-2158. |
| 不同红麻品种的土壤重金属污染修复潜力对比研究 |
| Comparative study on the potential of a kenaf(Hibiscus cannabinus)variety for remediating heavy metal contaminated soils |
| 投稿时间：2018-03-22 |
| DOI：10.11654/jaes.2018-0381 |
| 中文关键词: 红麻 重金属 干生物量 富集系数 转移系数 |
| 英文关键词: kenaf heavy metal plant biomass bioconcentration factor transfer factor |
| 基金项目:国家麻类产业技术体系建设专项（CARS-16-S05）；浙江省公益性技术应用研究计划项目（2017C32022） |
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| 中文摘要: |
| 为明确红麻的土壤重金属污染修复潜力，以7个国内代表红麻品种为试验材料，种植于Zn、Cu、Cr、Cd、Ni复合污染（P综合=6.2）土壤。在纤维成熟期测定红麻产量，以及叶片、茎秆、根系重金属含量，并计算红麻重金属转移系数、富集系数以及重金属转移量。结果表明：杂交组合红优2号在两年试验中，生物量均为最佳，分别为10.1 t·hm-2和16.7 t·hm-2；红麻不同器官的重金属累积差异显著，叶片和根系重金属累积量均高于茎秆，但富集系数均低于1，未达到高富集植物特征；湘红1号转移系数优于其他品种，其中重金属Cd的转移系数达到1.39；红麻单季最高可转移重金属Cu 185.3 g·hm-2（福红991）、Zn 1 012.9 g·hm-2（湘红1号）、Cd 25.7 g·hm-2（浙8310）、Cr 40.8 g·hm-2（H368）、Ni 34.8 g·hm-2（H368）。研究表明：红麻生物量大，重金属耐性高，具有一定经济价值，但重金属提取能力不强，可适用于重金属污染土壤的复垦。 |
| 英文摘要: |
| Soil heavy metal pollution has been a focus of research, and phytoremediation is currently a commonly used strategy for heavy metal contaminated soil restoration. However, it usually takes many years for plants to remediate heavy metal-contaminated soil. Furthermore, most of the plants used for restoration have small biomass and low economic value. Therefore, scientists have considered large biomass plants for remediation of heavy metal contaminated soils. In this study, kenaf, which has high economic value and biomass, was used to study the potential for remediating heavy metal contaminated soils. Seven kenaf varieties were planted in soils, which were heavily polluted by zinc (Zn), copper (Cu), chromium (Cr), cadmium (Cd), and nickel (Ni). The yield of kenaf and heavy metal contents in leaves, stems, and roots were determined at the maturity stage of the fiber; furthermore, the bioconcentration factor, transfer factor, and heavy metal transfer amount were calculated. The results showed that the biomass of the hybrid combination Hongyou-2 ranked first in the last two years' experiments, and its biomass values were 10.1 t·hm-2 and 16.7 t·hm-2, respectively. There was a significant difference in the concentration of heavy metals in different organs of kenaf (P<0.05). The accumulation of heavy metals in leaves and roots was higher than that in stalks, but the bioconcentration factors were < 1; thus, they did not reach the values as high hyperaccumulating plants. The transfer factor of Xianghong-1 was higher than that of the other varieties, in which the transfer factor of Cd reached 1.39. Kenaf could transfer at most 185.3 g·hm-2 Cu (Fuhong-991), 1 012.9 g·hm-2 Zn (Xianghong-1), 25.7 g·hm-2 Cd (Zhe-8310), 40.8 g·hm-2 Cr (H368), and 34.8 g·hm-2 Ni (H368). In general, kenaf is a heavy metal tolerant plant with a large biomass, but its heavy metal absorption capacity is not exceptionally good. It could be used as a reclamation crop grown on heavy metal contaminated soils. |
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