Emissions of CH₄ and N₂O from a Wetland in Sanjiang Plain

Abstract:

The seasonal variation and influence factors of emission of greenhouse gasses (CH₄ and N₂O) from the different water depths were studied during the growing seasons in a marsh wetland of Sanjiang Plain of China. The results showed that the wetland was a source of both CH₄ and N₂O during the growing seasons and emissions showed conspicuous temporal and spatial variations. Emission rates of CH₄ were higher in July and August while N₂O were higher in June and July. The highest average CH₄ flux among the four sites was in the water depth at 40cm with a rate of 37.00 mg•m^-2•h^-1 and the lowest was in the water depth at 0cm with a rate of 8.13 mg•m^-2•h^-1. While the highest average N₂O flux was in the water depth at 0cm with a rate of 0.063 mg•m^-2•h^-1 and the lowest was in the water depth at 60cm with a rate of 0.034 mg•m^-2•h^-1. Further analysis indicated that water depth at 40cm and the soil temperature at 5cm were the main factors affecting CH₄ emission. Water depths at 0 and 40cm were the main factors affecting N₂O emission. Air temperature and surface soil temperature were not the main factors affecting CH₄ and N₂O emissions.

• Periodical: Advanced Materials Research (Volumes 518-523)
• Pages: 4859-4862
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.518-523.4859
• Online since: May 2012
• Authors: Ya Fen Guo, Zhen Fen Wang, Jin Feng Song
• Keywords: CH₄ and N₂O, Sanjiang Plain, Seasonal Variation, Water Depths, Wetland

References

[1] H. Rodhe: Science Vol. 248 (1990), pp.1217-1219.

[2] R.A.L. Phillips, S.C. Whalen and W.H. Schlesinger: Global Change Biology Vol. 7 (2001), pp.557-563.

[3] M. Cao, S. Marshall and K. Gregson: Journal of Geophysical Research Vol. 101 (1996), pp.14399-14414.

[4] G.J. Whiting and J.P. Chanton: Nature Vol.364 (1993), pp.794-795.

[5] J. Fluckiger, A. Dallenbach, T. Blunier et al.: Science Vol.285 (1999), pp.227-230.

[6] Jisong Yang, Shuangquan Liu, Jinda Wang et al.: Journal of Plant Ecology Vol. 30 (2006), pp.432-440. In Chinese.

[7] S.C. Whalen and W.S. Reeburgh: Global Biogeochemical Cycles Vol. 6 (1992), pp.139-159.

[8] Jin Yue, Wei Liang, Jie Wu et al.: Chinese Journal of Applied Ecology Vol. 14 (2003), pp.2015-2018. In Chinese.

[9] Changchun Song, Baixing Yan, Yuesi Wang et al.: Chinese Science Bulletin Vol. 48 (2003), pp.2473-2477. In Chinese.

[10] Changcheng Mu, Xia Liu, Xiaolan Sun et al.: Acta Ecologica Sinica Vol. 30 (2010), pp.4598-4608. In Chinese.

[11] M.X. Wang X.J. Shangguan, R.X. Shen et al.: Advances in Atmospheric Sciences Vol. 10 (1993), pp.307-314.

[12] R. Teepe, R. Brumme and F. Beese: Soil Biochem Vol. 33 (2001), pp.1269-1275.

[13] Guoyuan Zou and Fusuo Zhang: Journal of China Agricultural University Vol. 7 (2002), pp.77-82. In Chinese.

[14] W.J. Parton, A.R. Mosier, D.S. Ojima et al.: Global Biogeochemical Cycles Vol. 10(1996), pp.401-412.