한국농림기상학회지 (Korean Journal of Agricultural and Forest Meteorology)

  • 제16권2호
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  • Pages.137-145
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  • 2014
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  • 1229-5671(pISSN)
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  • 2288-1859(eISSN)
한국농림기상학회 (Korean Society of Agricultural and Forest Meteorology)
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김제 벼-보리 이모작 논에서 보리재배 기간의 CO2 교환량의 계절적 변화

Seasonal Variation of CO2 Exchange During the Barley Growing Season at a Rice-barley Double Cropping Paddy Field in Gimje, Korea

  • 투고 : 2014.05.31
  • 심사 : 2014.06.30
  • 발행 : 2014.06.30
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초록

전라북도 김제시 부량면 신용리의 벼-보리 이모작 논에 설치된 플럭스 관측시스템에서 보리 재배기간동안(2011년 10월 27일~2012년 6월 8일) 연속적으로 관측된 플럭스 자료를 활용하여, 보래재배 논 생태계와 대기간의 $CO_2$ 교환량의 계절적 변화를 분석하였다. $CO_2$ 및 에너지의 교환량은 미기상학적인 에디공분산법으로 추정하였고, 환경인자(순복사, 강수량 등)와 작물체 생육량(엽면적지수, 초장 등)도 함께 측정 조사하였다. 관측된 플럭스 자료는 보정과 결측보충의 과정을 거친 후 분석에 활용되었다. 결론적으로, 벼-보리 이모작 논생태계에서 보리 재배기간동안의 보리생육은 $CO_2$의 순생태계교환량(NEE)에 큰 영향을 주는 것으로 분석되었다. 보리 건물중이 급격하게 증가되는 분얼단계에서 가장 많은 $CO_2$가 흡수되었으며, 출수개화기가 관측된 5월 상순에 가장 높은 NEE ($-11.2gCm^{-2}d^{-1}$)가 관측되었다. 보리 재배기간중의 누적 순생태계 교환량(NEE)과 총일차생산량(GPP) 및 생태적 호흡량(Re)은 각각 단위면적($m^2$)당 -348.0, 663.3, $315.2gCm^{-2}$로 분석되었다. 본 논문은 국내에서 보리 재배기간의 $CO_2$ 플럭스를 에디공분산기법으로 정량화한 최초의 연구결과이며, 향후 벼-보리 이모작 논 생태계의 $CO_2$ 수지 평가의 기초자료로 활용될 것으로 기대한다.

Rice-barley double cropping system is typical in southwestern part of South Korea. However, the information of carbon dioxide ($CO_2$) exchange for barley growing season has still limited in comparison with rice. Using the eddy covariance (EC) technique, seasonal variation of $CO_2$ exchange was analyzed for the barley growing season at a rice-barley double cropping field in Gimje, Korea. The effects of environmental factors and biomass on the $CO_2$ flux also were investigated. Quality control and gap-filling of flux data were conducted before this analysis and investigation. The results indicated that $CO_2$ uptake increased rapidly at tillering stage and maximum net ecosystem exchange of $CO_2$ (NEE) occurred at the early of May, 2012 ($-11.2gCm^{-2}d^{-1}$), when the heading of barley occurred. NEE, gross primary production (GPP), and ecosystem respiration (Re) during the barley growing season were -348.0, 663.3, and $315.2gCm^{-2}$, respectively. In this study, an attempt has been made to measure NEE, GPP, and Re with the help of the EC system for the barley growing season for the first time in Korea, focusing on $CO_2$ exchange between the biosphere and the atmosphere.

키워드

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피인용 문헌

  1. Comparison of Carbon Budget between Rice-barley Double Cropping and Rice Mono Cropping Field in Gimje, South Korea vol.18, pp.4, 2016, https://doi.org/10.5532/KJAFM.2016.18.4.337
  2. Estimation of Net Biome Production in a Barley-Rice Double Cropping Paddy Field of Gimje, Korea vol.17, pp.2, 2015, https://doi.org/10.5532/KJAFM.2015.17.2.173
  3. Modeling gross primary production of paddy rice cropland through analyses of data from CO 2 eddy flux tower sites and MODIS images vol.190, 2017, https://doi.org/10.1016/j.rse.2016.11.025