| 青菜中镉的吸收和累积对硒的响应规律 |
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| 引用本文： | 余垚,罗丽韵,刘哲,付平南,李花粉.青菜中镉的吸收和累积对硒的响应规律[J].环境科学,2020,41(2):962-969. |
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| 作者姓名： | 余垚 罗丽韵 刘哲 付平南 李花粉 |
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| 作者单位： | 中国农业大学资源与环境学院,农田土壤污染防控与修复北京市重点实验室,北京 100193,中国农业大学资源与环境学院,农田土壤污染防控与修复北京市重点实验室,北京 100193,中国农业大学资源与环境学院,农田土壤污染防控与修复北京市重点实验室,北京 100193,中国农业大学资源与环境学院,农田土壤污染防控与修复北京市重点实验室,北京 100193,中国农业大学资源与环境学院,农田土壤污染防控与修复北京市重点实验室,北京 100193 |
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| 基金项目： | 国家自然科学基金项目;现代农业产业技术体系专项资金项目 |
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| 摘 要： | 镉是一种有毒重金属,广泛种植的青菜却对镉有较强的富集能力.鉴于我国土壤的镉污染现状,消减青菜可食部位镉的累积有重要意义.硒可以调控植物对镉的吸收.通过3种青菜的水培硒、镉处理,以及硒影响下镉的吸收动力学,结果表明,3个浓度亚硒酸盐均使杭州油冬儿地上部镉含量显著降低50%左右;苏州青根和上海青的地上部镉含量则随硒水平提高而降低,但不显著.不同浓度亚硒酸盐可以降低青菜中镉转移系数,高浓度硒的抑制效果更明显; 50μmol·L~(-1)亚硒酸盐使杭州油冬儿和苏州青根的镉转移系数显著降低了50%左右.亚硒酸盐可以提高青菜中铁、锰的含量,50μmol·L~(-1)亚硒酸盐使杭州油冬儿地上部铁含量提高了1/2. 1 h吸收试验中,两种硒均显著提高了青菜对镉的吸收速率,并使V_(max)提高了100%以上.因此,硒可以降低青菜可食部位的镉累积,但此效果依赖于品种,而且主要来源于硒对镉在植物内转运的影响,而非根表的吸收竞争.
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| 关 键 词： | 青菜 硒 镉 转运 吸收动力学 |
| 收稿时间： | 2019/9/6 0:00:00 |
| 修稿时间： | 2019/9/23 0:00:00 |
Accumulation and Translocation of Cd in Brassica rapa Under the Influence of Selenium |
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| YU Yao,LUO Li-yun,LIU Zhe,FU Ping-nan and LI Hua-fen.Accumulation and Translocation of Cd in Brassica rapa Under the Influence of Selenium[J].Chinese Journal of Environmental Science,2020,41(2):962-969. |
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| Authors: | YU Yao LUO Li-yun LIU Zhe FU Ping-nan and LI Hua-fen |
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| Institution: | Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China,Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China,Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China,Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China and Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China |
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| Abstract: | |
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| Keywords: | pak choi selenium cadmium translocation uptake kinetics |
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