Korean Journal of Soil Science and Fertilizer (한국토양비료학회지)

Korean Society of Soil Science and Fertilizer (한국토양비료학회)
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Effect of Rice Vegetation and Water Management on Thrnover of Incorporated Organic Materials to Methane in a Korean Paddy Soil

논에서 시용 유기물의 메탄 전환율에 미치는 벼 식생 및 물관리의 영향

  • Shin, Yong-Kwang (Division of Agricultural Environment, National Institute of Agricultural Science and Technology) ;
  • Kim, Gun-Yeop (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) ;
  • 김건엽 (농업과학기술원 농업환경부) ;
  • 안종웅 (농촌진흥청 연구관리국) ;
  • 고문환 (농업과학기술원 농업환경부) ;
  • 엄기철 (농업과학기술원 농업환경부)
  • Received : 2003.01.20
  • Accepted : 2003.02.14
  • Published : 2003.02.28
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Abstract

Turnover rate of applied rice straw and rice straw compost in a rice paddy soil under the flooding and intermittent irrigation was studied. The chambers in duplicate were either planted or unplanted with rice. For planted chambers, the turnover rate to methane under the flooding increased with freshness of organic materials applied: 14.9% for RS5 (rice straw applied in May), 9.5 % for RS2 (rice straw incorporated in February), and 4.0% for RSC (rice straw compost amended in May). Similar trend was found in turnover rate to methane under the intermittent irrigation: 9.8% for RS5, 5.5% for RS2, and 2.1% for RSC. For planted chambers, turnover rate to methane under the flooding was generally 1.64 times higher than that under the intermittent irrigation. In contrast, for unplanted chambers, the turnover rate to methane under the flooding increased with freshness of organic materials applied: 8.7% for RS5, 3.3% for RS2, and 3.0% for RSC. Similar trend was observed in chambers under the intermittent irrigation: 5.4% for RS5, 3.0% for RS2, and 1.4% for RSC. For unplanted chambers, the turnover rate to methane under the flooding was generally 1.52 times higher than that under the intermittent irrigation.

논에 볏짚과 볏짚퇴비를 시용하고 상시담수와 간단관개로 관리하면서 벼가 심긴 chamber와 벼가 심겨지지 않은 chamber에서 메탄으로 전환되는 정도를 조사하였다. 벼가 심긴 chamber에서는 상시담수에서 메탄 전환율은 시용한 유기물의 신선도에 따라서 증가하였다. 볏짚을 5월에 시용한 처리 (RS5), 볏짚을 2월에 시용한 처리 (RS2), 볏짚퇴비를 5월에 시용한 처리 (RSC)에서 전환율이 각기 14.9%, 9.5%, 4.0%였었다. 범위는 4.0% ~ 14,9 %, 평균은 9.5%였었다. 간단관개에서 전환율도 유사한 경향이었다. 간단관개한 RS5 처리, RS2 처리, RSC 처리에서 메탄으로 전환율을 각기 9.8%, 5.5%, 2.1%였었다. 범위는 2.1% ~ 9.8%, 평균은 5.8%였었다. 벼를 심은 chamber에서 상시담수에서 메탄으로 전환율은 간단관개에서 보다 1.64배 높았다. 벼를 심지 않은 chamber에서 상시담수에서 메탄 전환율은 시용한 유기물의 신선도에 따라서 증가하였다. RS5 처리 RS2 처리 RSC 처리에서 전환율이 각기 8.7%, 3.3%, 3.0%였었다. 범위는 3.0% ~ 8.7%, 평균은 5.0%였었다. 간단관개에서 전환율도 유사한 경향이었다. 간단관개한 RS5 처리, RS2 처리. RSC 처리에서 메탄 전환율을 각기 5.4%, 3.0%, 1.4 %였었다. 범위는 1.4% ~ 5.4%, 평균은 3.3%였었다. 벼를 심은 chamber에서 상시담수에서 메탄 전환율은 간단관개에서 보다 1.52배 높았다.

Keywords

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