Processes Governing Methane Emissions from Rice

2 PROCESSES GOVERNING METHANE EMISSIONS FROM RICE 

Reviewers of this topic include Schiitz et al. (1989a,b), Conrad (1993), Neue and Roger (1994) and Segers (1998). The rate of emission depends on the linked rates of CH4 production, transport and oxidation, which are sensitive to a host of soil, plant, climate and management variables. Production occurs through 

1 Methane production in incubated samples of rice soils multiplied by estimated amounts of soil (Koyama, 1963) 190 

2 Uniform emission factor based on flux measurements multiplied by harvest area of rice (Cicerone and Shelter, 1981 Holzapfel-Pschorn and Seiler, 1986 Schtitz et al., 1989a, respectively) 59, 70-170, 50-150 

3a Methane emission proportional to net primary production, e.g. 3-7 % (Aselman and Cmtzen, 1989), 5% (Taylor et al, 1991) 60-140 

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