Korean Journal of Environmental Agriculture (한국환경농학회지)

The Korean Society of Environmental Agriculture (한국환경농학회)
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Estimation and Comparison of Carbon Uptake in Rice Paddy, Dry Cropland and Grove in South Korea using Eddy Covariance Flux Data

에디 공분산 플럭스 자료를 이용한 논, 밭, 과수원의 연간 탄소 흡수량 추정 및 비교

  • Hur, Jina (Climate Change Assessment Division, Department of Agricultural Environment, National Institute of Agricultural Sciences, Rural Development Administration) ;
  • Shim, Kyo-Moon (Climate Change Assessment Division, Department of Agricultural Environment, National Institute of Agricultural Sciences, Rural Development Administration) ;
  • Lee, ByeongTae (Climate Change Assessment Division, Department of Agricultural Environment, National Institute of Agricultural Sciences, Rural Development Administration) ;
  • Kim, Yongseok (Climate Change Assessment Division, Department of Agricultural Environment, National Institute of Agricultural Sciences, Rural Development Administration) ;
  • Jo, Sera (Climate Change Assessment Division, Department of Agricultural Environment, National Institute of Agricultural Sciences, Rural Development Administration)
  • 허지나 (농촌진흥청 국립농업과학원 농업환경부 기후변화평가과) ;
  • 심교문 (농촌진흥청 국립농업과학원 농업환경부 기후변화평가과) ;
  • 이병태 (농촌진흥청 국립농업과학원 농업환경부 기후변화평가과) ;
  • 김용석 (농촌진흥청 국립농업과학원 농업환경부 기후변화평가과) ;
  • 조세라 (농촌진흥청 국립농업과학원 농업환경부 기후변화평가과)
  • Received : 2020.10.06
  • Accepted : 2020.11.11
  • Published : 2020.12.31
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Abstract

BACKGROUND: To quantify carbon exchange at agricultural ecosystems in South Korea, net ecosystem exchange (NEE) at three croplands including a rice paddy, a bean field and an apple orchard was measured on the basis of the eddy covariance technique. METHODS AND RESULTS: NEE of CO2 during the growing season (June to September) averaged over the recent two years (2018-2019) was the highest at rice (-4.49 g C m-2 day-1), followed by the bean (-3.12 g C m-2 day-1) and apple (-0.93 g C m-2 day-1). The diurnal variation of NEE was the highest at the rice, while the seasonal variation of it was the highest at the bean than others. In terms of yearly variation, the rice paddy and the bean field absorbed more CO2 in 2019 compared to 2018, while the apple orchard absorbed less. CONCLUSION: Our results confirmed that these croplands consistently acted as net sinks for CO2 during the growing season because an amount of CO2 uptake from photosynthesis was larger than one of its emissions from respiration. The quantification of net CO2 exchange at agricultural ecosystems may help to better understand the local carbon cycle over various time scales.

Keywords

References

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