Korean Journal of Environmental Agriculture (한국환경농학회지)

The Korean Society of Environmental Agriculture (한국환경농학회)
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Decreases Nitrous Oxide Emission and Increase Soil Carbon via Carbonized Biomass Application of Orchard Soil

과수원 토양의 탄화물 시용에 따른 아산화질소 발생량 감소와 토양탄소 증가효과

  • Lee, Sun-il (Climate Change & Agroecology Division, Department of Agricultural Environment, National Institute of Agricultural Sciences, Rural Development Administration) ;
  • Kim, Gun-yeob (Climate Change & Agroecology Division, Department of Agricultural Environment, National Institute of Agricultural Sciences, Rural Development Administration) ;
  • Choi, Eun-jung (Climate Change & Agroecology Division, Department of Agricultural Environment, National Institute of Agricultural Sciences, Rural Development Administration) ;
  • Lee, Jong-sik (Climate Change & Agroecology Division, Department of Agricultural Environment, National Institute of Agricultural Sciences, Rural Development Administration) ;
  • Jung, Hyun-cheol (Climate Change & Agroecology Division, Department of Agricultural Environment, National Institute of Agricultural Sciences, Rural Development Administration)
  • 이선일 (농촌진흥청 국립농업과학원 농업환경부 기후변화생태과) ;
  • 김건엽 (농촌진흥청 국립농업과학원 농업환경부 기후변화생태과) ;
  • 최은정 (농촌진흥청 국립농업과학원 농업환경부 기후변화생태과) ;
  • 이종식 (농촌진흥청 국립농업과학원 농업환경부 기후변화생태과) ;
  • 정현철 (농촌진흥청 국립농업과학원 농업환경부 기후변화생태과)
  • Received : 2017.04.28
  • Accepted : 2017.06.20
  • Published : 2017.06.30
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Abstract

BACKGROUND: Carbonized biomass is a carbon-rich solid product obtained by the pyrolysis of biomass. It has been suggested to mitigate climate change through increased carbon storage and reduction of greenhouse gas emission. The objective of this study was to evaluate carbon dioxide ($CO_2$) and nitrous oxide ($N_2O$) emissions from soil after carbonized biomass addition. METHODS AND RESULTS: The carbonized biomass was made from a pyrolyzer, which a reactor was operated about $400{\sim}500^{\circ}C$ for 5 hours. The treatments were consisted of a control without input of carbonized biomass and two levels of carbonized biomass inputs as 6.06 Mg/ha for CB-1 and 12.12 Mg/ha for CB-2. Emissions of $CO_2$ and $N_2O$ from orchard soil were determined using closed chamber for 13 weeks at $25^{\circ}C$ of incubation temperature. It was shown that the cumulative $CO_2$ were $209.4g\;CO_2/m^2$ for CB-1, $206.4g\;CO_2/m^2$ for CB-2 and $214.5g\;CO_2/m^2$ for the control after experimental periods. The cumulative $CO_2$ emission was similar in carbonized biomass input treatment compared to the control. It was appeared that cumulative $N_2O$ emissions were $4,478mg\;N_2O/m^2$ for control, $3,227mg\;N_2O/m^2$ for CB-1 and$ 2,324mg\;N_2O/m^2$ for CB-2 at the end of experiment. Cumulative $N_2O$ emission contents significantly decreased with increasing the carbonized biomass input. CONCLUSION: Consequently the carbonized biomass from byproducts such as pear branch residue could suppress the soil $N_2O$ emission. The results fromthe study imply that carbonized biomass can be utilized to reduce greenhouse gas emission from the orchard field.

본 연구는 농가에서 버려지는 부산물을 탄화물로 변환한 후 토양에 적용하여 토양의 화학적 특성 변화와 온실가스 발생량을 비교하였다 탄화물로의 활용은 세 가지의 장점이 있었다. 첫 번째 버려지는 자원은 활용하여 재이용한 측면, 두 번째 농경지의 토양탄소 함량을 증진 시킬 수 있는 측면, 세 번째 농경지에서 발생하는 아산화질소를 줄일 수 있는 측면에서 유용할 것으로 판단된다. 하지만 $N_2O$ 감축기작에 대한 정확한 파악을 위해 질소순환과 연계된 추가적인 연구가 필요하다.

Keywords

References

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