Diel Change of Methane Emission through Rice Plant under Different Water Management and Organic Amendment

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

  • 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) ;
  • 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) ;
  • 고문환 (농업과학기술원 농업환경부) ;
  • 엄기철 (농업과학기술원 농업환경부)
  • Received : 2003.01.20
  • Accepted : 2003.02.06
  • Published : 2003.02.28

Abstract

To characterize diel pattern of methane transport via rice plant, methane emission was measured on specific days in rice growing stages; tillering, meiotic, heading and harvest stages, from a paddy under different water management and organic amendments. Methane emission was monitored every two hours a day from chambers with and without rice plants. Proportion of the rice plant-mediated methane emission at different stage increased till the maximum growth of LAI and dry weight, and decreased thereafter. The proportion of methane emission through rice plants on June 18-19 at tillering stage was 38.4, 36.5 and 64.3 percent for NPK, Rice straw compost, RSC, and rice straw on February, RS2, respectively. The proportion on July 30-31 at meiotic stage was 70.4, 74.3 and 74.4 percent for NPK, RSC and RS2, respectively. The proportion on August 20-21 at heading stage was 80.1, 84.5 and 74.8 percent for NPK, RSC and RS2, respectively. The proportion on September 28-29 at harvest stage was 69.9, 65.9 and 64.4 percent for NPK, RSC and RS2, respectively.

Keywords

Diel change;Methane;Water management;Organic amendment

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