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土壤圈(英文版). 1996, (04)

Simulation of Methane Oxidation by Paddy Soils in a Closed SystemEnglish Full Text

CAI ZUCONG and YAN XIAOYUAN(LMCP, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 China)

Abstract: Methane oxidation by paddy soils in a closed system could be simulsted by the equation where xo and x are the CH4 concentrations at time zero and t, respectively; k1 and k2 are constants related to the constant of first-order-kinetics. According to the equation the change of soil ability to oxidize CH4 could be estimated by the equstion The results showed that the soil ability to oxidize CH4 varied, depending on the initial CH4 concentration.High initial CH4 concentration stimulated soil ability to consume CH4, while low concentration depressed the ability. This characteristic of paddy soil seemed to be of considerable significance to self-adjusting CH4 emission from flooded rice fields if there exist oxic microsites in the soil.
Keywords：

methane oxidation; paddy soils; simulation;

  • Series：

    (D) Agriculture; (B) Chemistry/ Metallurgy/ Environment/ Mine Industry

  • Subject：

    Environment Science and Resources Utilization

  • Classification Code：

    X503

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