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Regularity and estimation of methane emission from marshland in the Sanjiang Plain

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Abstract

The regularity of CH4 emission from marshland in the Sanjiang Plain was studied by sampling in the open field and analyzing under laboratory condition, the annual emission amount is also estimated. By Grey Relatively Analysis we know that the soil temperature in the 10-cm depth of grass-root layer is close related with CH4 emission. CH4 emission has different kinds of diurnal emission modes:before-dawn maximum mode, night maximum mode and irregular fluctuation mode. The seasonal variation trend of CH4 emission rates is going up steadily from May to August and dropping down from September, the maximum lies behind the maximum of temperature. CH4 emission rates of different marshland types are different, the CH4 emission rate of Glyceriaspiculosa — Carex marshland is always higher than that of Carex lasiocarpa marshland. The paper also studies the difference of CH4 emission rates in different managing modes and analyzes the emission rates between China and U. S. A. The result shows: the average value of CH4 emission rate is 17.26mg/(m2·h), the annual amount of CH4 emission is about 0.75Tg.

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Authors and Affiliations

  1. Changchun Institute of Geography, the Chinese Academy of Sciences, 130021, Changchun, P. R. China

    Cui Baoshan & Ma Xuehui

  2. Ministry of Forestry, the People’s Republic of China, 100714, Beijing, P. R. China

    Zhang Mingxiang

Authors
  1. Cui Baoshan
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  2. Ma Xuehui
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  3. Zhang Mingxiang
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Additional information

Supported by National Natural Sciences Foundation of China, and thank the Ecological Test Station of Mires and Wetlands in the Sanjiang Plain, the Chinese Academy of Sciences.

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Cui, B., Ma, X. & Zhang, M. Regularity and estimation of methane emission from marshland in the Sanjiang Plain. Chin. Geograph.Sc. 8, 74–84 (1998). https://doi.org/10.1007/s11769-997-0085-y

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  • DOI: https://doi.org/10.1007/s11769-997-0085-y

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