| 刈割对蜈蚣草的砷吸收和植物修复效率的影响 |
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| 引用本文： | 李文学,陈同斌,刘颖茹.刈割对蜈蚣草的砷吸收和植物修复效率的影响[J].生态学报,2005,25(3):538-542. |
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| 作者姓名： | 李文学 陈同斌 刘颖茹 |
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| 作者单位： | 中国科学院地理科学与资源研究所环境修复室,北京,100101 |
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| 基金项目： | 国家杰出青年科学基金资助项目 (4 0 3 2 5 0 0 3 )，国家自然科学基金重点资助项目 (4 0 2 62 0 2 2 )，国家重大基础研究前期研究专项资助项目 (2 0 0 2 CCA0 3 80 0 )~~ |
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| 摘 要： | 以野生苗移栽的蜈蚣草为试材 ,通过盆栽试验研究了收获次数对蜈蚣草生长、砷吸收和植物修复效率的影响。结果表明 :在 3次收获中 ,随着收获次数的增加 ,不同砷浓度处理之间蜈蚣草生物量的差异逐步缩小 ;不加砷的对照处理中 ,每次收获后的砷吸收速率下降趋势 ,而在 3个加砷处理中 ,第 2次收获和第 3次收获的蜈蚣草的吸砷速率为 6 3～ 75 μg/ (plant· d)、4 4～ 5 5μg/ (plant· d) ,均显著高于第 1次收获时的吸收速率。表明多次收获并没有降低砷的积累速度。由此可见 ,通过适当增加蜈蚣草的收获次数是提高砷修复效率的一种策略
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| 关 键 词： | 蜈蚣草 超富集植物 刈割 砷 吸收 植物修复效率 |
| 文章编号： | 1000-0933(2005)03-0538-05 |
| 收稿时间： | 2004/1/15 0:00:00 |
| 修稿时间： | 2004年1月15日 |
Effects of harvesting on As accumulation and removal efficiency of As by Chinese brake (Pteris vittata L.) |
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| LI Wenxue,CHEN Tongbin and LIU Yingru.Effects of harvesting on As accumulation and removal efficiency of As by Chinese brake (Pteris vittata L.)[J].Acta Ecologica Sinica,2005,25(3):538-542. |
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| Authors: | LI Wenxue CHEN Tongbin and LIU Yingru |
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| Institution: | Center for Environmental Remediation; Institute of Geographical Sciences and Natural Resources Research; Chinese Academy of Sciences; Beijing; China |
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| Abstract: | Arsenic (As) contamination of soils is a major environmental problem both in China and in the world. Chinese brake (Pteris vittata L.), which has a strong ability to tolerate and hyperaccumulate As, is a good candidate for phytoremediation of arsenic-contaminated soils. To understand the processes of As hyperaccumulation by P. vittata and to take P. vittata into practice, a growing body of researches has been carried out on understanding the mechanisms of As tolerance and hyperaccumulation, including the As... |
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| Keywords: | Chinese brake (Pteris vittata L ) hyperaccumulator harvesting arsenic accumulation phytoextraction efficiency |
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