| 谭诗敏,寇萌,李明,熊娟,汪明霞,谭文峰.Pb、Cd复合污染对辣椒生长及其吸收重金属的影响[J].农业环境科学学报,2025,44(8):2097-2109. |
| Pb、Cd复合污染对辣椒生长及其吸收重金属的影响 |
| Effects of combined pollution of Pb and Cd on the growth of chili peppers（Capsicum annuum L.）and their absorption of heavy metals |
| 投稿时间：2024-09-26 |
| DOI：10.11654/jaes.2024-0806 |
| 中文关键词: 复合污染 交互作用 转运系数 辣椒 重金属 |
| 英文关键词: combined pollution interaction translocation factor chili pepper heavy metal |
| 基金项目:国家自然科学基金项目（42277299）；湖北省重点研发计划项目（2022BBA0044） |
| 作者 | 单位 | E-mail | | 谭诗敏 | 华中农业大学资源与环境学院, 生态环境部土壤健康诊断与绿色修复重点实验室, 武汉 430070 | | | 寇萌 | 华中农业大学资源与环境学院, 生态环境部土壤健康诊断与绿色修复重点实验室, 武汉 430070 | | | 李明 | 华中农业大学资源与环境学院, 生态环境部土壤健康诊断与绿色修复重点实验室, 武汉 430070 | | | 熊娟 | 华中农业大学资源与环境学院, 生态环境部土壤健康诊断与绿色修复重点实验室, 武汉 430070 | | | 汪明霞 | 华中农业大学资源与环境学院, 生态环境部土壤健康诊断与绿色修复重点实验室, 武汉 430070 | wangmx@mail.hzau.edu.cn | | 谭文峰 | 华中农业大学资源与环境学院, 生态环境部土壤健康诊断与绿色修复重点实验室, 武汉 430070 | |
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| 中文摘要: |
| 为探究Pb、Cd复合污染对辣椒（Capsicum annuum L.）生长及其吸收Pb、Cd的影响，采用盆栽试验，设置Pb、Cd交互共16个处理，结合辣椒植株各部位Pb、Cd含量，探讨土壤-辣椒体系中Pb、Cd复合污染对辣椒富集转运重金属的影响。结果表明，土壤中重金属硝酸提取率>氯化钙提取率，低Pb、Cd复合污染促使硝酸提取率上升，Cd降低氯化钙-Pb提取率，而 Pb提高氯化钙-Cd提取率。Pb、Cd复合污染下辣椒根、茎、叶鲜质量在特定Pb含量下随Cd含量增加而增加；而随复合污染程度增加，辣椒果实鲜质量降低。Pb抑制低Cd处理下的根伸长，但促进高Cd处理下的根伸长。辣椒果实中Cd含量最高，其次是根、茎、叶，根中Cd含量随Pb含量增加而增加，3 mg·kg-1 Cd处理下果实中Cd含量超过食品质量安全标准限值（0.05 mg·kg-1）；辣椒中Pb含量排序为根>茎>叶>果实，各含量处理下果实 Pb 含量均未超标（0.1 mg·kg-1）。辣椒中 Cd 转运系数（TF）以 TFCd茎-果最大，其值均大于 5，TFCd茎-叶和TFCd茎-果随Pb含量增大而增大，Pb转运系数排序为TFPb根-茎>TFPb茎-叶>TFPb茎-果，Pb促进Cd在辣椒地上部的转运，但Cd对Pb无影响。研究表明，辣椒在不同重金属复合污染下响应不同，辣椒种植在高Cd复合污染土壤中对人体健康造成危害的风险极大，但在高含量Pb复合污染土壤中风险较低。 |
| 英文摘要: |
| To explore the effects of combined pollution of Pb and Cd on chili pepper growth and their absorption, pot experiment was conducted with 16 treatments involving Pb and Cd interactions. By analyzing the contents of Pb and Cd in various parts of chili pepper plants, the effects of combined Pb and Cd in the soil-chili pepper system on the accumulation and transport of heavy metals in chili peppers were discussed. The results showed that the nitric acid extraction rate of heavy metals in soil was higher than that of the calcium chloride extraction rate. The combination of low level Pb and Cd promoted the extraction rate by nitric acid. Cd reduced the calcium chloride-Pb extraction rate in soil, while Pb increased the calcium chloride-Cd extraction rate. Under specific Pb concentrations, the fresh weights of roots, stems and leaves of chili pepper increased with the increase of Cd concentration. However, as the combined concentrations increased, the fresh weight of chili pepper fruits decreased. Pb inhibited root elongation at low Cd concentration but promoted root elongation at high Cd concentration. The highest Cd concentration was found in chili pepper fruits, followed by roots, stems and leaves. The content of Cd in roots increased with the increase of Pb concentration. Under the treatment of 3 mg·kg-1 Cd, the content of Cd in fruits exceeded the limit of food quality and safety standards（0.05 mg·kg-1）. The Pb concentration in chili peppers followed the order：root>stem> leaf>fruit, with the Pb content in fruits not exceeding the standard limit（0.1 mg·kg-1）at any studied concentration. The translocation factor （TF）of Cd in chili peppers, specially TFCd stem-fruit was the highest, exceeding 5 in all cases. Both TFCd stem-leaf and TFCd stem-fruit increased with increasing Pb concentration. In contrast, the translocation factor for Pb were ranked as：TFPb root-stem>TFPb stem-leaf >TFPb stem-fruit. Pb promoted the redistribution and translocation of Cd in the aboveground part of chili peppers, but Cd had no effect on Pb translocation. Consequently, growing chili peppers in soil with high concentrations of combined Cd poses a significant risk to human health, while the risk is lower in soil with high concentrations of combined Pb. |
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