Journal of Guangdong University of Technology ›› 2018, Vol. 35 ›› Issue (06): 90-94.doi: 10.12052/gdutxb.180103

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A Study of the N2O Emissions from Urban Wetlands—Taking Haizhu Lake Wetland in Guangzhou as an Example

Rao Xin1, Xiao Rong-bo2,3, Xu Zhi-wei2,3   

  1. 1. School of Humanities and Economic Management, China University of Geosciences, Beijing 100038, China;
    2. School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China;
    3. Guangdong Provincial Academy Environmental Science, Guangzhou 510030, China
  • Received:2018-07-05 Online:2018-11-23 Published:2018-11-23

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Abstract: The objectives of this study are to investigate the fluxes of N2O from urban wetlands, and to find the related environmental factors. The enclosed static chamber-gas chromatography method is used to analyze the N2O fluxes of Canna indica (CI), Colocasia tonoimo (CT) and Aphelandra ruellia(AR) from December 2013 to November 2014 in the typical urban wetland of the Haizhu Lake in Guangzhou City. The results shows that the average annual fluxes of N2O in the water-free areas are 0.029 mg·m-2·h-1 for CI, 0.089 mg·m-2·h-1for CT, and 0.013 mg·m-2·h-1 for AR, and are 0.016 mg·m-2·h-1 for CI, 0.0069 mg·m-2·h-1for CT, 0.022 mg·m-2·h-1 for AR in the water areas. Differences in N2O fluxes between different seasons are obvious. Water level and temperature are significant factors affecting N2O emission, while the influence of different plants community type is not significant. The N2O emission flux goes to the largest when the temperature is at 25~35℃.

Key words: urban wetland, N2O emissions, hydraulic condition, wetland plants

CLC Number: 

  • X171
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