Abstract
Pot experiments were conducted to monitor the changes in compositions and δ13C values of soil-trapped CH4 and C02 in flooded rice soil with and without rice plants or rice straw. Incorporation of rice straw increased the concentration of CH4 and C02 accumulated in soil, and the quantities of emitted CH4 to the atmosphere. Rice plants reduced the concentration of soil-trapped CH4 and CO2, and the decreased portion of CH4 was replaced by N2. A significantly negative correlation was found between soil-trapped CH4 and N2. The presence of rice plants increased the δ13C values of CH4. The δ13C values of CH4 tended to increase toward the end of the growing season and were positively correlated with concentration of soil-trapped CH4. A positive correlation between δ13C values of CH4 and C02, and between the δ13C values of CH4 and its concentration, were observed. The CH4 in the rice stems was 4–14% enriched in13C relative to soil-trapped CH4. In contrast, CO2 in rice plant stems was 1–9% lighter in13C relative to soil-trapped C02. These results are discussed in relation to the precursor pools and pathways of methanogenesis.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
BacheletD Neue HU (1993) Methane emission from wetland rice areas of Asia. Chemosphere 26:218–237
Chanton JP, Martens CS, Kelley CA, Crill PM, Showers WJ (1992) Methane transport mechanism and isotopic fractionation in emergent macrophytes of an Alaskan tundra lake. J Geophys Res 97:16681–16888
Coleman DD, Risatti JB (1981) Fractionation of carbon and hydrogen isotopes by methane-oxidizing bacteria. Geochim Cosmochim Acta 45:1033–1037
Craig H (1953) The geochemistry of the stable carbon isotope. Geochim Cosmochim Acta 3:53–92
Happell JD, Chanton JP, Whiting GJ, Showers WJ (1993) Stable isotopes as tracers of methane dynamics in Everglades marshers with and without active populations of methane oxidizing bacteria. J Geophys Res 98:14771–14782
Harden HS, Chanton JP (1994) Locus of methane release and mass-dependent fractionation from two wetland macrophytes. Limnol Oceanogr 39:148–154
Inubushi K, Hori K, Matsumoto S, Umebayashi M, Wada H (1989) Methane emission from the flooded paddy soils to the atmosphere through rice plant (in Japanese with English summary). Jpn J Soil Sci Plant Nutr 60:318–324
Nakamura K, Takai Y, Wada E (1990) Carbon isotopes of soil gases and related organic matter in an agroecosystem with special reference to paddy field. In: Durrance EM, Hinkle ME, Reimer GM, Sugisaki R, Augustithis SS (eds) Geochemistry of gaseous elements and compounds. Theophrastus Publications, Athens, Greece, pp 455–484
Sugimoto A, Wada E (1993) Carbon isotopic composition of bacterial methane in a soil incubation experiment: Contribution of acetate and CO2/H2. Geochim Cosmochim Acta 57:4015–4027
Tyler SC, Brailsford GW, Yagi K, Minami K, Cicerone RJ (1994) Seasonal variations in methane flux and δ13CH4 values for rice paddy in Japan and their implications. Global Biogeochem Cycles 8:1–12
Uzaki M, Mizutani H, Wada E (1991) Carbon isotope composition of methane from rice paddies in Japan. Biogeochem 13:159–175
Wagatsuma T, Jujo K, Tawaraja K, Sato T, Ueki A (1992) Decrease of methane concentration and increase of nitrogen gas concentration in the rhizosphere by hydrophytes. Soil Sci Plant Nutr 38:467–476
Watanabe I, Takada G, Hashimoto T, Inubushi K (1995) Evaluation of alternative substrates for determining methane-oxidizing activities and methanotrophic populations in soils. Biol Fertil Soils 20:101–106
Whiticar MJ, Faber E, Schoell M (1986) Biogenic methane formation in marine and freshwater environments: CO2 reduction vs. acetate fermentation isotope evidence. Geochim Cosmochim Acta 50:693–709
Yoshida S, Coronel V, Parao FT, de los Reyes E (1974) Soil carbon dioxide flux and rice photosynthesis. Soil Sci Plant Nutr 20:381–386
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Chidthaisong, A., Watanabe, I. Changes in concentration andδ 13C values of soil-trapped CH4 and C02 in flooded rice soil. Biol Fert Soils 24, 70–75 (1997). https://doi.org/10.1007/BF01420223
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF01420223