| 浮萍吸收不同形态氮的动力学特性研究 |
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| 引用本文： | 沈根祥,姚芳,胡宏,倪吾钟,朱荫湄.浮萍吸收不同形态氮的动力学特性研究[J].土壤通报,2006,37(3):505-508. |
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| 作者姓名： | 沈根祥 姚芳 胡宏 倪吾钟 朱荫湄 |
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| 作者单位： | 1. 浙江大学,环境与资源学院,浙江,杭州,310029;上海市环境科学研究院,上海,200233
2. 浙江大学,环境与资源学院,浙江,杭州,310029 |
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| 摘 要： | 吸收试验结果表明,浮萍(Spirodela oligorrhiza)吸收铵态氮和硝态氮的动力学特性可用M ichaelis-M enten方程来描述。浮萍对铵态氮的亲和力大于对硝态氮的亲和力,证实了浮萍“优先吸收净化铵态氮”的观点。研究还发现,浮萍吸收硝态氮的最大速率大于吸收铵态氮的最大速率,基于浮萍吸收不同形态氮的动力学特性,提出了构建物理作用(增氧工艺)—微生物(硝化作用)—植物(浮萍)复合污水净化体系的见解。
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| 关 键 词： | 浮萍 氮 形态 吸收动力学 |
| 文章编号： | 0564-3945(2006)03-0505-04 |
| 修稿时间： | 2005年4月10日 |
The Kinetics of Ammonium and Nitrate Uptake by Duckweed (Spirodela oligorrhiza) Plant |
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| SHEN Gen-xiang,YAO Fang,HU Hong,NI Wu-zhong,ZHU Yin-mei.The Kinetics of Ammonium and Nitrate Uptake by Duckweed (Spirodela oligorrhiza) Plant[J].Chinese Journal of Soil Science,2006,37(3):505-508. |
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| Authors: | SHEN Gen-xiang YAO Fang HU Hong NI Wu-zhong ZHU Yin-mei |
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| Abstract: | The kinetic characteristics of ammonium and nitrate uptake by duckweed(Spirodela oligorrhiza) plants could be illustrated with the Michaelis-Menten equation.The results indicated that the Km value of ammonium uptake was less than that of nitrate uptake by duckweed.The finding reinforced the insight about " preferential uptake and clean-up ammonium in solution by duckweed plants".It is also found that the maximum rate of nitrate uptake by duckweed plants was larger than that of ammonium uptake.Based on the kinetic characteristics of ammonium and nitrate uptake by duckweed(Spirodela oligorrhiza) plants,a new complex system as physical oxygen enrichment—microbial nitrification—plant (duckweed) absorption for waste water clean-up was suggested. |
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| Keywords: | Duckweed(Spirodela oligorrhiza) Nitrogen Form Uptake kinetics |
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