Korean Journal of Environmental Biology (환경생물)

Korean Society of Environmental Biology (한국환경생물학회)
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Changes in Crop Yield and $CH_4$ Emission from Rice Paddy Soils Applied with Biochar and Slow-release Fertilizer

논토양에서 바이오차르 투입 및 완효성비료 시용에 따른 메탄발생량과 작물생산량 변화

  • Kim, Daegyun (Crop Research Division Gyeonggi-do Agricultural Research and Extension Services) ;
  • Cho, Kwangrae (Crop Research Division Gyeonggi-do Agricultural Research and Extension Services) ;
  • Won, Taejin (Crop Research Division Gyeonggi-do Agricultural Research and Extension Services) ;
  • Bak, In-Tae (Crop Research Division Gyeonggi-do Agricultural Research and Extension Services) ;
  • Yoo, Gayoung (Department of Environmental Science and Engineering College of Engineering, Kyung Hee University)
  • 김대균 (경기도농업기술원 작물연구과) ;
  • 조광래 (경기도농업기술원 작물연구과) ;
  • 원태진 (경기도농업기술원 작물연구과) ;
  • 박인태 (경기도농업기술원 작물연구과) ;
  • 유가영 (경희대학교 공과대학 환경학 및 환경공학과)
  • Received : 2014.11.10
  • Accepted : 2014.12.08
  • Published : 2014.12.31
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Abstract

Emission reduction of $CH_4$ (methane gas) from rice paddy soil is a very important measure for climate change mitigation in agricultural sector. In this study, we investigated the changes in crop yield and $CH_4$ emissions in response to application of biochar and fertilizers. The experimental site is located in Hwasung, Kyunggido and experimental design is the split-plot method with three replicates. Treatments included rice straw (RS) and biochar (BC) amendments nested with the conventional NPK fertilizer (NPK) and slow release fertilizer (SRF). Control was also prepared with the soil with the conventional NPK fertilization with no amendment. Measurement of $CH_4$ emission was conducted during the growing season of 2014 using a dynamic chamber method. The results showed that application of rice straw increased daily $CH_4$ emission rate by 15%, while application of biochar reduced daily $CH_4$ emission rate by 38%. When we combined biochar application with slow release fertilizer, $CH_4$ emission was reduced by 45%. Further, the crop yield was also increased in all treatments compared with the control except for the treatment of rice straw application with slow release fertilizer. Overall results imply that biochar amendment to agricultural soil can be an effective strategy to decrease annual $CH_4$ emission with no reduction in crop yield.

Keywords

References

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