Abstract
Methane and C02 production in flooded acid sulfate soils of Thailand were governed primarily by soil oxidation-reduction potential (Eh) and pH. The critical Eh and pH levels at which CH4 emission began was Eh-150 mV, and pH 6.1. Low soil pH limited soil reduction and subsequently CH4 production. Soil respiration (C02 production) was influenced by Eh-pH levels and organic matter content. Soils with higher C02 production rates produced greater amounts of CH4. Soil pH, however, was the dominant variable which influenced organic matter decomposition, low soil Eh conditions and subsequent CH4 and CO2 production. Curvilinear or log transformations of pH, Eh and organic matter content (OM) were used in explaining variables controlling CH4 and CO2 production; CH4 = −2.359 − 0.0001 Eh + 2.047 pH − 3.019 (In pH)2 CO2 = −5210 − 1.6 Eh + 3144 (In pH) + 1011 (In OM).
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Jugsujinda, A., Delaune, R.D., Lindau, C.W. et al. Factors controlling carbon dioxide and methane production in acid sulfate soils. Water Air Soil Pollut 87, 345–355 (1996). https://doi.org/10.1007/BF00696846
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DOI: https://doi.org/10.1007/BF00696846