한국농림기상학회지 (Korean Journal of Agricultural and Forest Meteorology)

  • 제17권2호
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  • Pages.173-181
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  • 2015
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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 보리-벼 이모작지에서의 순 생물상생산량의 추정

Estimation of Net Biome Production in a Barley-Rice Double Cropping Paddy Field of Gimje, Korea

  • 투고 : 2015.05.14
  • 심사 : 2015.06.29
  • 발행 : 2015.06.30
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초록

본 연구는 보리-벼 이모작 작부체계의 논 생태계에 설치한 개방형 $CO_2$ 플럭스시스템과 자동개폐식 챔버형 $CH_4$ 측정시스템에서 관측된 탄소관련 온실가스 자료와 작물 생장량자료를 활용하여 논 생태계의 연간(2012.10.20~2013.10.21) 탄소수지를 분석하였다. 결론적으로 농작물의 생육인자와 환경인자는 $CO_2$의 순 생태계교환량(NEE)에 영향을 주는 것으로 분석되었고, $CH_4$ 배출량은 영농활동(특히 물관리)에 따라 큰 영향을 받는 것으로 분석되었다. 2012~2013년 벼-보리 이모작 작부체계의 논 생태계에서 보리 재배기간에는 단위면적($m^2$)당 100.2g의 탄소를 흡수하고 벼 재배기간에는 $m^2$당 374.1g의 탄소를 흡수하였지만, 휴경기간에는 토양호흡의 형태로 $m^2$당 41.2g의 탄소를 배출하여 연간 총 $433.1g\;m^{-2}$의 탄소를 흡수하는 것으로 분석되었다. 여기에 농작물의 수확에 따른 논 생태계의 탄소 배출량과 $CH_4$ 형태로배출되는 탄소량을 포함한 연간 순생물상생산량(NBP)은 $184.7g\;C\;m^{-2}$으로 추정되어, 보리-벼 이모작 작부체계의 논 생태계는 탄소 발원인 것으로 평가되었다.

Fluxes of carbon dioxide ($CO_2$) were measured above crop canopy using the Eddy Covariance (EC) method, and emission rate of methane ($CH_4$) was measured using Automatic Open/Close Chamber (AOCC) method during the 2012-2013 barley and rice growing season in a barley-rice double cropping field of Gimje, Korea. The net ecosystem exchange (NEE) of $CO_2$ in the paddy field was analyzed to be affected by crop growth (biomass, LAI, etc.) and environment (air temperature, solar radiation, etc.) factors. On the other hand, the emission rate of $CH_4$ was estimated to be affected by water management (soil condition). NEE of $CO_2$ in barley, rice and fallow period was -100.2, -374.1 and $+41.2g\;C\;m^{-2}$, respectively, and $CH_4$ emission in barley and rice period was 0.2 and $17.3g\;C\;m^{-2}$, respectively. When considering only $CO_2$, the barley-rice double cropping ecosystem was estimated as a carbon sink ($-433.0g\;C\;m^{-2}$). However, after considering the harvested crop biomass ($+600.3g\;C\;m^{-2}$) and $CH_4$ emission ($+17.5g\;C\;m^{-2}$), it turned into a carbon source ($+184.7g\;C\;m^{-2}$).

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. 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
  3. Evaluation of Carbon Balance for Carbon Sink/Emission with Different Treatments in Paddy Field vol.35, pp.4, 2017, https://doi.org/10.11626/KJEB.2017.35.4.715