KOREAN JOURNAL OF CROP SCIENCE (한국작물학회지)

The Korean Society of Crop Science (한국작물학회)
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Changes in Methane Emissions from Paddy under Different Tillage and Cultivation Methods

벼 재배 시 경운 및 재배방법에 의한 메탄발생 양상

  • Kim, Sukjin (Crop cultivation & Environment Research Division, National Institute of Crop Science, RDA) ;
  • Cho, Hyun-Suk (Crop production& Physiology Research Division, NICS, RDA) ;
  • Choi, Jong-Seo (Crop cultivation & Environment Research Division, National Institute of Crop Science, RDA) ;
  • Park, Ki Do (Crop foundation Research Division, NICS, RDA) ;
  • Jang, Jeong-Sook (Crop cultivation & Environment Research Division, National Institute of Crop Science, RDA) ;
  • Kang, Shin-gu (Crop cultivation & Environment Research Division, National Institute of Crop Science, RDA) ;
  • Park, Jeong-Hwa (Crop cultivation & Environment Research Division, National Institute of Crop Science, RDA) ;
  • Kim, Min-Tae (Crop cultivation & Environment Research Division, National Institute of Crop Science, RDA) ;
  • Kang, In-Jeong (Crop cultivation & Environment Research Division, National Institute of Crop Science, RDA) ;
  • Yang, Woonho (Crop cultivation & Environment Research Division, National Institute of Crop Science, RDA)
  • 김숙진 (재배환경과, 국립식량과학원) ;
  • 조현숙 (작물재배생리과, 국립식량과학원) ;
  • 최종서 (재배환경과, 국립식량과학원) ;
  • 박기도 (기초기반과, 국립식량과학원) ;
  • 장정숙 (재배환경과, 국립식량과학원) ;
  • 강신구 (재배환경과, 국립식량과학원) ;
  • 박정화 (재배환경과, 국립식량과학원) ;
  • 김민태 (재배환경과, 국립식량과학원) ;
  • 강인정 (재배환경과, 국립식량과학원) ;
  • 양운호 (재배환경과, 국립식량과학원)
  • Received : 2016.11.14
  • Accepted : 2016.11.24
  • Published : 2016.12.31
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Abstract

The increase in carbon stock and sustainability of crop production are the main challenges in agricultural fields relevant to climate change. Methane is the most important greenhouse gas emitted from paddy fields. This study was conducted to investigate the effects of tillage and cultivation methods on methane emissions in rice production in 2014 and 2015. Different combinations of tillage and cultivation were implemented, including conventional tillage-transplanting (T-T), tillage-wet hill seeding (T-W), minimum tillage-dry seeding (MT-D), and no-tillage-dry seeding (NT-D). The amount of methane emitted was the highest in T-T treatment. In MT-D and NT-D treatments, methane emissions were significantly decreased by 77%, compared with that in T-T treatment. Conversely, the soil total carbon (STC) content was higher in MT-D and NT-D plots than in tillage plots. In both years, methane emissions were highly correlated with the dry weight of rice ($R^2=0.62{\sim}0.96$), although the cumulative emissions during the rice growing period was higher in 2014 than in 2015. T-T treatment showed the highest $R^2$ (0.93) among the four treatments. Rice grain yields did not significantly differ with the tillage and cultivation methods used. These results suggest that NT-D practice in rice production could reduce the methane emissions and increase the STC content without loss in grain yield.

벼 재배시 경운과 재배방법 따른 메탄 발생량 및 토양탄소함량변화를 구명하기위해 경운-이앙, 경운-무논점파, 최소경운-건답직파 및 무경운-건답직파를 비교하는 시험을 수행한 결과 다음과 같다. 1. 메탄 발생량은 경운-이앙 처리구에서 가장 많았으며 경운-무논점파>최소경운-건답직파=무경운 건답직파 순으로 적었다. 2. 메탄의 발생량과 벼 생육과의 관계를 보면 생육초기 작물의 생체량이 많아질수록 메탄 발생량이 증가는 경향을 보였다. 3. 토양 탄소함량은 시험전과 비교하여 경운-이앙 처리구에서 가장 낮은 값을 나타내었고, 최소경운-건답직파와 무경운 처리구에서 높은 값을 나타내었다. 4. 최소경운-건답직파 및 무경운 처리구의 쌀수량이 경운-이앙 처리구에 비해 다소 적었으나 통계적으로 유의한 차이는 없었다.

Keywords

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