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首页> 外文期刊>Journal of Environmental Science and Health >Diurnal fluctuations in oxygen release from roots of Acorus calamus Linn in a modeled constructed wetland
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Diurnal fluctuations in oxygen release from roots of Acorus calamus Linn in a modeled constructed wetland

机译：在模拟的人工湿地中，cal蒲根的氧气释放的日变化

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摘要

Oxygen is known to be released from plant roots, but has seldom been quantified for wetland plants. Our study aims to quantify oxygen release from the roots of one wetland species in China, and use this knowledge as a basis for future modeling. We measured diurnal fluctuations in oxygen release from the roots of Acorus calamus Linn in a modeled constructed wetland (CW) using a titanium (III) citrate buffer. Oxygen release was monitored every two hours. Maximum oxygen release was recorded in the range of 215.2 750.8 μmolg~(-1)h~(-1) and occurred around 15:00. The maximum value of photosynthetically active radiation (PAR) was in the range of 1281.8-1712.0 mmolm~(-2)s~(-1) and occurred around 13:00. Both the oxygen release rate and PAR were found to approach zero at night. Our results indicate that oxygen release depends largely on light intensity and exhibits a diurnal periodicity with release occurring only during daytime. Rate of root oxygen release varied during the daytime and this temporal variation was well described by the Gaussian function. While further validation is needed, we suggest that the Gaussian function may be used as the basis for modeling root oxygen release in natural and constructed wetlands.
机译：众所周知，氧气是从植物的根部释放出来的，但很少对湿地植物进行量化。我们的研究旨在量化中国一个湿地物种的根源释放的氧气，并将这些知识用作未来建模的基础。我们在模拟的人工湿地（CW）中使用柠檬酸钛（III）缓冲液测量了cal蒲林根部释放的氧气的日变化。每两个小时监测一次氧气释放。记录的最大氧气释放在215.2 750.8μmolg〜（-1）h〜（-1）范围内，并在15:00左右发生。光合有效辐射（PAR）的最大值在1281.8-1712.0 mmolm〜（-2）s〜（-1）范围内，发生在13:00左右。晚上发现氧气释放速率和PAR都接近零。我们的结果表明，氧气的释放主要取决于光强度，并且表现出昼夜周期性，释放仅在白天发生。白天，根系氧气释放速率发生变化，这种时间变化可以通过高斯函数很好地描述。尽管需要进一步的验证，但我们建议将高斯函数用作模拟自然湿地和人工湿地中根系氧释放的基础。

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  • 来源
    《Journal of Environmental Science and Health》 |2011年第3期|p.224-229|共6页
  • 作者

    C. DONG; W. ZHU; M. GAO; L. F. ZHAO; J. Y. HUANG; Y. Q. ZHAO;

  • 作者单位

    National Engineering Research Center of Water Resources Efficient Utilization and Engineering Safety, Hohai University, Nanjing P. R. China,College of Environmental Science and Engineering, Hohai University, Nanjing, P.R. China;

    National Engineering Research Center of Water Resources Efficient Utilization and Engineering Safety, Hohai University, Nanjing P. R. China,College of Environmental Science and Engineering, Hohai University, Nanjing, P.R. China;

    College of Environmental Science and Engineering, Hohai University, Nanjing, P.R. China;

    College of Environmental Science and Engineering, Hohai University, Nanjing, P.R. China;

    College of Environmental Science and Engineering, Hohai University, Nanjing, P.R. China;

    Centre for Water Resources Research, School of Architecture, Landscape and Civil Engineering, University College Dublin, Belfield, Dublin, Ireland;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    wetland plants; constructed wetlands; diurnal fluctuation; photosynthetically active radiation; oxygen release rate; gaussian function;

    机译：湿地植物;人工湿地;日间波动光合有效辐射;氧气释放率高斯函数;

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