Abstract
Large diurnal and seasonal variations in methane flux from rice paddies have been found in many studies. Although these variations are considered to result from changes in methane formation rates in the soil and the transport capacity (e.g. biomass, physiological activities, and so on) of rice plants, the real reasons for such variations are as yet unclear. This study was conducted to clarify the effects of temperature on the rate of methane transport from the root zone to the atmosphere using hydroponically grown rice plants. Methane emission rates from the top of the rice plants whose roots were soaked in a solution with a high methane concentration were measured using a flow-through chamber method with the top or root of the rice plants being kept at various temperatures. The methane emission rates and methane concentrations in solution were analyzed using a diffusion model which assumes that the methane emission from a rice paddy is driven by molecular diffusion through rice plants by a concentration gradient. In the experiment where the temperature around the root was changed, the conductance for methane diffusion was typically 2.0-2.2 times larger when the solution temperature was changed from 15 to 30 °C. When the air temperature surrounding the top of the rice plant was changed, the change in conductance was much less. In addition, from measurements of methane flux and methane concentration in soil water in a lysimeter rice paddy during the 2 growing seasons of rice, it was found that the conductance for methane transport was correlated with the soil temperature at 5 cm depth. These results suggest that the temperature around the root greatly affects the methane transport process in rice plants, and that the process of passing through the root is important in determining the rate of methane transport through rice plants.
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References
Arikado H, Ikeda K and Taniyama T 1990 Anatomico-ecological studies on the aerenchyma and the ventilating system in rice plants. Bull. Fac. Bioresour. Mie Univ. 3, 25–39 (In Japanese with English summary).
Armstrong W 1971 Radial oxygen losses from intact rice roots as affected by distance from the apex, respiration and waterlogging. Physiol. Plant. 25, 192–197.
Baba I and Takahashi Y 1956 Water and sand culture methods. In Experimental Methods in Crop Science. Eds. Togari Y et al. pp 157–185. Association of Agricultural Techniques, Tokyo. (In Japanese).
Cicerone R J and Shetter J D 1981 Sources of atmospheric methane: Measurements in rice paddies and a discussion. J. Geophys. Res. 86, 7203–7209.
Conrad R 1989 Control of methane production in terrestrial ecosystems. In Exchange of Trace Gases between Terrestrial Ecosystems and the Atmosphere. Eds. M O Andreae and D S Schimel. pp 39–58. John Wiley, Chichester.
Dunfield P, Knowles R, Dumont R and Moore T R 1993 Methane production and consumption in temperate and subarctic peat soils: response to temperature and pH. Soil Biol. Biochem. 25, 321–326.
Inubushi K, Hori K, Matsumoto S, Umebayashi M and Wada H 1989 Methane emission from the flooded paddy soil to the atmosphere through rice plant. Jpn. J. Soil Sci. Plant Nutr. (Nippon dojo-hiryougaku zasshi) 60, 318–324 (In Japanese with English summary).
Koyama T 1963 Gaseous metabolism in lake sediments and paddy soils and the production of atmospheric methane and hydrogen. J. Geophys. Res. 68, 3971–3973.
Lindau C W, Patrick W H Jr and DeLaune R D 1993 Factors affecting methane production in flooded rice soils. In Agricultural Ecosystem Effects on Trace Gases and Global Climate Change. pp 157–165. ASA Special Publication no. 55. Am. Soc. Agron., Crop Sci. Soc. Am., Soil Sci. Soc. Am., Madison, WI.
Neue H U, Wassmann R, Lantin R S, Alberto M C and Aduna J B 1994 Methane emission from ricefields. IRRN 19–3, 31.
Nouchi I, Mariko S and Aoki K 1990 Mechanism of methane transport from the rhizosphere to the atmosphere through rice plants. Plant Physiol. 94, 59–66.
Nouchi I, Hosono T, Aoki K and Minami K 1994 Seasonal variation in methane flux from rice paddies associated with methane concentration in soil water, rice biomass and temperature, and its modeling. Plant Soil 161, 195–208.
Sass R L, Fisher F M, Turner F T and Jund M F 1991 Methane emission from rice fields as influenced by solar radiation, temperature, and straw incorporation. Global Biogeochem. Cycles 5, 335–350.
Schütz H, Holzapfel-Pschorn A, Conrad R, Rennenberg H and Seiler W 1989 A 3-year continuous record on the influence of daytime, season, and fertilizer treatment on methane emission rates from an Italian rice paddy. J. Geophys. Res. 94, 16405–16416.
Schütz H, Schröder P and Rennenberg H 1991 Role of plants in regulating the methane flux to the atmosphere. In Trace Gas Emissions by Plants. Eds. T D Sharkey, E A Holland and H A Mooney. pp 29–63. Academic Press, San Diego.
Seiler W, Holzapfel-Pschorn A, Conrad R and Scharffe D 1984 Methane emission from rice paddies. J. Atmos. Chem. 1, 241– 268.
Watanabe A, Murase J, Katoh K and Kimura M 1994 Methane production and its fate in paddy fields: V. Fate of methane remaining in paddy soil at harvesting stage. Soil Sci. Plant Nutr. 40, 221–230.
Watson R T, Meira Filho L G, Sanhueza E and Janetos A 1992 Green house gases: Sources and sinks, climate change 1992, The Supplementary Report to The IPCC Scientific Assessment. Eds. Houghton et al. pp 25–46. Cambridge Univ. Press, Cambridge.
Wilke C R 1949 Estimation of liquid diffusion coefficients. Chem. Eng. Progr. 45, 218.
Yagi K and Minami K 1990 Effect of organic matter application on methane emission from some Japanese rice fields. Soil. Sci. Plant Nutr. 36, 599–610.
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Hosono, T., Nouchi, I. The dependence of methane transport in rice plants on the root zone temperature. Plant and Soil 191, 233–240 (1997). https://doi.org/10.1023/A:1004203208686
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DOI: https://doi.org/10.1023/A:1004203208686