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서영진(Young-Jin Seo),박준홍(Jun-Hong Park),김찬용(Chan-Yong Kim),김종수(Jong-Su Kim),조두현(Doo-Hyun Cho),최성용(Seong-Yong Choi),박소득(So-Deuk Park),정현철(Hyun-Cheol Jung),이덕배(Deog-Bae Lee),김광섭(Kwang-Seop Kim),박만(Man Par 한국토양비료학회 2011 한국토양비료학회지 Vol.44 No.6
논토양 종류가 메탄배출에 미치는 영향을 구명하기 위하여 적황색토인 화동통과 회색토인 신흥통을 공시하여 벼 재배기간중 메탄배출량, 산화환원전위 및 토양중 산화물 함량을 분석하였다. 적황색토에서 메탄배출이 회색토에 비해 유의하게 낮았으며, 산화환원전위는 상대적으로 높았다. 적황색토는 회색토에 비해 쉽게 환원될 수 있는 Active oxide 함량은 낮은 반면, 상대적으로 안정성이 높은 Free oxide의 함량이 높았다. 따라서 논토양 종류별 메탄배출은 벼 재배기간중 산화환원전위와 토양중 Geothite, Hematite 등과 같은 메탄산화제의 함량에 영향을 받는 것으로 나타났다. Anaerobic decomposition of organic materials in flooded rice fields produces methane (CH4) gas, which escapes to the atmosphere primarily by transport through organs of the rice plants such as arenchyma etc., Although the annual amount of methane emitted from a given area is influenced by cultivation periods of rice and organic/inorganic amendments etc., soil type also affects methane emission from paddy soil during a rice cultivation. A field experiment was conducted to evaluate effects of soil type on CH4 emission in two paddy soils. One is a red-yellow soil classified as a Hwadong series (fine, mixed, mesic family of Aquic Hapludalfs), and the other is a gley soil classified as a Shinheung series (fine loamy, mixed, nonacid, mesic family of Aeric Fluvaquentic Endoaquepts). During a flooded periods, redox potentials of red-yellow soil were significantly higher than gley soil. CH4 emission in red-yellow soil (0.21 kg ha<SUP>-1</SUP> day<SUP>-1</SUP>) was lower than that in gley soil (5.25 kg ha<SUP>-1</SUP> day<SUP>-1</SUP>). In the condition of different soil types, CH4 emissions were mainly influenced by the content of total free metal oxides in paddy soil. The results strongly imply that iron- or manganese-oxides of well ordered crystalline forms in soil such as goethite and hematite influenced on a CH4 emission, which is crucial role as a CH4 oxidizers in paddy soil during a rice cultivation.
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