Journal
NUTRIENT CYCLING IN AGROECOSYSTEMS
Volume 64, Issue 1-2, Pages 59-69Publisher
SPRINGER
DOI: 10.1023/A:1021178713988
Keywords
methanogenic archaea; microbial community; mitigation; rice root; rice straw; syntrophy; temperature; thermodynamics
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Methane emission rates are a function of production, transport and oxidation of CH(4) in the rice field. Production of CH(4) is the prerequisite for any flux. The most important variables that control CH(4) production include soil type, rice variety, temperature, soil redox potential, water management and fertilization with organic carbon or nitrogen. The effects of these variables have empirically been assessed on a macroscopic scale. However, the actual mechanisms by which these variables affect the microbial CH(4) production on a microscopic scale are little understood. The purpose of the present contribution is to review existing knowledge of microbiological data and microscopic processes that are relevant for the control of CH(4) production. These include the flow of carbon and electrons during the anaerobic degradation process, thermodynamic constraints of reactions in-situ and changes in the composition of the microbial community.
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