Factors influencing methane emission from peat soils: Comparison of tropical and temperate wetlands

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dc.contributor.authorInubushi, K.
dc.contributor.authorOtake, S.
dc.contributor.authorFurukawa, Y.
dc.contributor.authorShibasaki, N.
dc.contributor.authorAli, M.
dc.contributor.authorItang, A.M.
dc.contributor.authorTsuruta, H.
dc.date.accessioned2014-05-01T10:47:26Z
dc.date.available2014-05-01T10:47:26Z
dc.date.issued2007-01
dc.description.abstractMethane (CH4) emissions from peat soils in tropical and temperate wetlands were compared. Annual CH4 emission rates in Ozegahara, the largest wetland on Honshu main island, Japan, were higher than in drained forest wetland areas examined in Indonesia. Methane emissions from the lowland paddy fields examined in Indonesia were higher than those of peaty paddy fields in Japan. There was generally a positive correlation (r2 = 0.09; P < 0.1) between CH4 emissions and CH4 production activities in wetland soils. In Ozegahara, there was a positive relationship (r2 = 0.80; P < 0.01) between CH4 production activities and soil pH, but there was no such relationship in Indonesia. The range of soil pH in Ozegahara was 5-7, while pH values in the Indonesian sites were lower than 5. There was a positive response of CH4 emission with respect to groundwater level in all of these areas. In Indonesia, land-use change from swamp and drained forest to cassava or coconut field lowered groundwater levels and decreased CH4 emission, while change to lowland paddy raised the groundwater level and increased CH4 emission. Addition of acetate generally inhibited CH4 production during the early period (until 2 weeks) of incubation, then enhanced it afterward in both Ozegahara and Indonesian wetland soils. Addition of hydrogen mostly enhanced CH4 production. From the results of this study, CH4 fluxes from peat soil to the atmosphere were positively correlated with CH4 production activities, and CH4 production activity in peat soil was regulated by soil pH, while land-use change from wetland to upland crop lowered groundwater level and thus reduced CH4 production and enhanced CH4 oxidationen_US
dc.identifier.citationNutrient Cycling in Agroecosystems Vol.: 71, No.: 1, January 2005 [Page 93-99]en_US
dc.identifier.urihttp://hdl.handle.net/123456789/794
dc.language.isoenen_US
dc.publisherSpringer-Verlagen_US
dc.subjectGlobal warmingen_US
dc.subjectMethaneen_US
dc.subjectPeat soilen_US
dc.subjectpHen_US
dc.subjectSubstratesen_US
dc.titleFactors influencing methane emission from peat soils: Comparison of tropical and temperate wetlandsen_US
dc.typeArticleen_US

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