Seasonal Change of Rice-mediated Methane Emission from a Rice Paddy under Different Water Management and Organic Amendments

물 관리와 유기물 시용이 다른 논에서 벼 식물체를 통한 메탄 배출의 계절변화

  • Shin, Yong-Kwang (Division of Agricultural Environment, National Institute of Agricultural Science and Technology) ;
  • Lee, Yang-Soo (Division of Agricultural Environment, National Institute of Agricultural Science and Technology) ;
  • Ahn, Jong-Woong (Research Management Bureau, Rural Development Administration) ;
  • Koh, Mun-Hwan (Division of Agricultural Environment, National Institute of Agricultural Science and Technology) ;
  • Eom, Ki-Cheol (Division of Agricultural Environment, National Institute of Agricultural Science and Technology)
  • 신용광 (농업과학기술원 농업환경부) ;
  • 이양수 (농업과학기술원 농업환경부) ;
  • 안종웅 (농촌진흥청 연구관리국) ;
  • 고문환 (농업과학기술원 농업환경부) ;
  • 엄기철 (농업과학기술원 농업환경부)
  • Received : 2003.01.20
  • Accepted : 2003.02.12
  • Published : 2003.02.28

Abstract

Methane emission was measured in a rice paddy under different water management and organic amendments. Methane emission from planted chambers and unplanted chambers was monitored to evaluate the rice-mediated methane emission. In flooding methane emission from planted chambers with NPK, NPK(+P), was $0.174g\;CH_4\;m^{-2}\;d^{-1}$ while that from unplanted chambers with NPK, NPK(-P), was $0.046g\;CH_4\;m^{-2}\;d^{-1}$ Methane emission from planted chambers with rice straw compost amendment, RSC(+P), was $0.214g\;CH_4\;m^{-2}\;d^{-1}$, while that from unplanted chambers with rice straw compost amendment, RSC(-P), was $0.076g\;CH_4\;m^{-2}\;d^{-1}$. Methane emission from planted chambers with rice straw amendment in Fehruary, RS2(+P), was $0.328g\;CH_4\;m^{-2}\;d^{-1}$, while that from unplanted chambers with rice straw amendment in February, RS2(-P), was $0.1g\;CH_4\;m^{-2}\;d^{-1}$. Methane emission from planted chambers with rice straw amendment in May, RS5(+P), was $0.414g\;CH_4\;m^{-2}\;d^{-1}$, while that from unplanted chamhers with rice straw amendment in May, RS5(-P), was $0.187g\;CH_4\;m^{-2}\;d^{-1}$. In intermittent irrigation methane emission from NPK(+P) was $0.115g\;CH_4\;m^{-2}\;d^{-1}$, while that from NPK(-P) was $0.041g\;CH_4\;m^{-2}\;d^{-1}$. Methane emission from RSC(+P) was $0.137g\;CH_4\;m^{-2}\;d^{-1}$, while that from RSC(-P) was $0.06g\;CH_4\;m^{-2}\;d^{-1}$. Methane emission from RS2(+P) was $0.204g\;CH_4\;m^{-2}\;d^{-1}$, while that from RS2(-P) was $0.09g\;CH_4\;m^{-2}\;d^{-1}$. Methane emission from RS5(+P) was $0.273g\;CH_4\;m^{-2}\;d^{-1}$, while that from RS5(-P) was $0.13g\;CH_4\;m^{-2}\;d^{-1}$. Methane transport via rice plant under flooding for NPK plot, RSC plot, RS2 plot and RS5 plot was 73.6%, 64.5%, 69.5% and 54.8%, respectively, and mean was 65.6%. Methane transport via rice plants under intermittent irrigation for NPK plot, RSC plot, RS2 plot and RS5 plot was 64.3%, 59.2%, 55.9% and 52.4%, respectively, and mean was 58.0%.

Keywords

Water management;Organic amendments;Methane;Rice paddy

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