| 大气和土壤对蔬菜汞的贡献 |
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| 引用本文： | 刘德绍,青长乐.大气和土壤对蔬菜汞的贡献[J].应用生态学报,2002,13(3):315-318. |
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| 作者姓名： | 刘德绍 青长乐 |
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| 作者单位： | 1. 重庆市环境保护局,400015
2. 西南农业大学资源环境学院,重庆,400716 |
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| 基金项目： | 国家教委博士点基金资助项目 (970 60 4) |
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| 摘 要： | 通过田间观测和盆栽试验 ,研究了蔬菜富集Hg的特性及土壤、大气对蔬菜Hg的贡献 .对田间 11种蔬菜的研究发现 ,蔬菜根和叶的含Hg浓度高于茎和果 ;在自然条件下 ,蔬菜所吸收的Hg 6 0 %以上分布于地上部的可食部分 .盆栽试验结果表明 ,在气Hg浓度为 5 7 6± 14 7ng·m-3 条件下 ,红萝卜、莴苣叶 (可食部分 )的含Hg浓度超过了食品卫生标准 ;气Hg、土壤Hg对蔬菜Hg的贡献率分别为 70 4 %～ 90 7%和9 3%～ 2 9 6 % ,气Hg较土壤Hg是蔬菜更为重要的Hg源
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| 关 键 词： | 蔬菜 汞吸收 大气汞 土壤汞 污染源 |
| 文章编号： | 1001-9332(2002)03-0315-04 |
| 修稿时间： | 2000年4月12日 |
Contribution to vegetable mercury from atmosphere and soil |
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| LIU Deshao,QING Changle.Contribution to vegetable mercury from atmosphere and soil[J].Chinese Journal of Applied Ecology,2002,13(3):315-318. |
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| Authors: | LIU Deshao QING Changle |
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| Institution: | College of Resources and Environmental Science, Southwest Agricultural University, Chongqing 400716. |
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| Abstract: | In this research, the characteristics of Hg accumulation in vegetable and the contribution of atmosphere and soil to vegetable Hg were studied by field observation and pot experiments. 11 kinds of vegetable were experimented in field. The results indicated that the Hg contents in roots and leaves of vegetables were higher than that in stems and fruits. In the natural condition, more than 60% of the assimilated Hg was distributed in the up-ground edible parts. The results of pot experiments showed that the Hg content of the edible parts of carrot and lettuce exceeded the Food Health Standard Value (FASV), when the atmospheric Hg content reached 57.6 +/- 14.7 ng.m-3. This result indicted that the contribution of atmosphere and soil to vegetable Hg were 70.4-90.7% and 9.3-29.6% respectively. So, the vegetable Hg was affected mainly by atmosphere Hg. |
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| Keywords: | Vegetable Mercury Absorption |
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