| 用141Ce示踪研究小麦对稀土的吸收速率和积累规律 |
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| 引用本文： | 李德成,黄圣彪,彭安.用141Ce示踪研究小麦对稀土的吸收速率和积累规律[J].环境科学,2001,22(2):74-77. |
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| 作者姓名： | 李德成 黄圣彪 彭安 |
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| 作者单位： | 中国科学院生态环境研究中心 |
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| 基金项目： | 国家自然科学基金资助重大项目(29890280) |
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| 摘 要： | 应用141Ce,采用水培的方法研究冬小麦对稀土元素的吸收和分配规律及铈在水-植物界面间的传输速率.结果表明,在实验期内,冬小麦幼苗中铈的浓度随培养时间的延长而增加,随培养液中铈浓度的提高而增加;铈在冬小麦各器官中的浓度,根部的远大于在茎叶中的;吸收速率是较高浓度处理的要高于较低浓度处理的,并且在不同培养期中的吸收速率是不相同的.对冬小麦的吸收速率随时间的变化规律进行了拟合,给出了定量描述公式.
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| 关 键 词： | 小麦 141Ce 吸收速率 积累规律 |
| 文章编号： | 0250-3301(2001)02-04-0074 |
| 收稿时间： | 2000/6/19 0:00:00 |
| 修稿时间： | 2000年6月19日 |
The Absorbed Rate and Distribution Rule of Rare Earth Elements in Wheat by 141Ce as Tracer |
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| Li Decheng,Huang Shengbiao and Peng An.The Absorbed Rate and Distribution Rule of Rare Earth Elements in Wheat by 141Ce as Tracer[J].Chinese Journal of Environmental Science,2001,22(2):74-77. |
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| Authors: | Li Decheng Huang Shengbiao and Peng An |
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| Institution: | SKLEAC, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. |
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| Abstract: | The study on absorption,distribution rules and transportation rates of cerium in the interface of water-wheat by 141Ce in culture solution were carried out.The results showed that the concentrations of cerium in wheat seedling were gradually increased during the experiment,and so did the same after increasing the concentration of cerium adding in the culture solutioin.The concentrations of cerium in roots of winter wheat were significantly high than that in tops(steam & leave).The absorption rates of cerium in wheat with different treatments of cerium were distinct.The quantitative formulas,which describe the rule of absorption rate and culture time,was given resulting from the fit of the experimental data. |
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| Keywords: | wheat 141Ce absoption rate concentration distributiion |
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