| 富营养水体中总氮与总磷比对苦草生长的影响 |
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| 引用本文： | 文明章,郑有飞,吴莱军.富营养水体中总氮与总磷比对苦草生长的影响[J].生态学杂志,2008,27(3):414-417. |
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| 作者姓名： | 文明章 郑有飞 吴莱军 |
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| 作者单位： | 南京信息工程大学环境科学与工程学院,南京,210044 |
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| 基金项目： | 国家高技术研究发展计划(863计划)
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中国科学院知识创新战略行动项目 |
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| 摘 要： | 在室外受控实验条件下,研究了富营养水体中不同氮磷比(TN/TP)(12.5∶1、25∶1、50∶1)对苦草(Vallisneria spiralis)生长的影响.结果表明:当TN/TP为25∶1时,苦草的生长状态最好,苦草生物量的增长率最大,分别高于TN/TP为12.5∶1和50∶1时的54%和31%;当TN/TP为25∶1时,附着生物尤其是附着藻类的生长状态最差,对苦草生长的不利影响最小;可见,富营养水体中适宜于苦草生长的TN/TP为25∶1;TN/TP为25∶1这一比例的应用具有相对性,当水体营养浓度低于限制水平时,该比例适用,如果水体中营养盐浓度超过限制水平时,该比例则不适用.
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| 关 键 词： | 富营养化 TN/TP 苦草 附着生物 形态指标 富营养 水体营养 总氮 总磷 苦草 生长状态 影响 Effects the growth water 营养盐浓度 水平 浓度低 相对性 应用 比例 中适 最小 藻类 附着生物 |
| 文章编号： | 1000-4890（2008）03-0414-04 |
| 收稿时间： | 2007-05-31 |
| 修稿时间： | 2007-12-02 |
Effects of TN:TP ratio in eutrophic water on the growth of Vallisneria spiralis |
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| WEN Ming-zhang,ZHENG You-fei,WU Rong-jun.Effects of TN:TP ratio in eutrophic water on the growth of Vallisneria spiralis[J].Chinese Journal of Ecology,2008,27(3):414-417. |
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| Authors: | WEN Ming-zhang ZHENG You-fei WU Rong-jun |
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| Abstract: | In an outdoor controllable experiment,the effects of different TN:TP ratios(12.5:1,25:1,and 50:1) in eutrophic water on the growth of Vallisneria spiralis were investigated.When the TN:TP ratio was 25:1,V.spiralis had the best growth,with a biomass increment being 54% and 31% higher than that when the TN:TP ratio was 12.5:1 and 50:1,respectively,while the growth of periphyton,especially of epiphytic algae,was the worst,giving the least adverse effects on V.spiralis,indicating that a 25:1 of TN:TP ratio in eutrophic water was optimal for the growth of V.spiralis.However,such an optimal TN:TP ratio only worked when the nutrients concentration in eutrophic water was below the limited level,otherwise,it could be failed to be applicable. |
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| Keywords: | eutrophication TN:TP Vallisneria spiralis periphyton morphological index |
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