Korean Journal of Soil Science and Fertilizer (한국토양비료학회지)

Korean Society of Soil Science and Fertilizer (한국토양비료학회)
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Assessment on Nitrous oxide (N2O) Emissions of Korea Agricultural Soils in 2009

2009년 우리나라 농경지 토양에서의 N2O 배출량 평가

  • 정현철 (농촌진흥청 국립농업과학원) ;
  • 김건엽 (농촌진흥청 국립농업과학원) ;
  • 이덕배 (농촌진흥청 국립농업과학원) ;
  • 심교문 (농촌진흥청 국립농업과학원) ;
  • 이슬비 (농촌진흥청 국립농업과학원) ;
  • 강기경 (농촌진흥청 국립농업과학원)
  • Received : 2011.11.14
  • Accepted : 2011.11.25
  • Published : 2011.12.31
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Abstract

This study was conducted to assess $N_2O$ emissions in agricultural soils of Korea. According to 1996 and 2006 IPCC (Intergovernmental Panel on Climate Change) methodology, $N_2O$ emission was calculated the sum of direct emission ($N_2O_{DIRECT}$) and indirect emission ($N_2O_{INDIRECT}$). To calculate $N_2O$ emissions, emission factor was used default of IPCC and activity data was used the food, agricultural, forestry and fisheries statistical yearbook of MIFAFF (Ministry for Food, Agriculture, Forestry and Fisheries). It was emitted 8,608 $N_2O$ Mg resulted from direct emission by application of chemical fertilizer and animal manure, input in n-fixation crops and input of crop residues and emissions converted $N_2O$ into $CO_2$ equivalent was 2,668 $CO_2$-eq Gg. Indirect emission as $N_2O_{(G)}$ (atmospheric deposition of $NH_3$ and $NO_X$) and $N_2O_{(L)}$ (leaching and runoffs) were 4,567 and 6,013 $N_2O$ Mg and emissions converted $N_2O$ into $CO_2$ equivalent were 1,416 and 1,864 $CO_2$-eq Gg, respectively. Total $N_2O$ emission in Korea agricultural soil in 2009 was 5,948 $CO_2$-eq Gg.

우리나라 농경지에서의 $N_2O$ 배출량을 1996과 2006 IPCC 방법론에 준하여 직접배출과 간접배출로 구분하여 산정하였다. 배출량 산정을 위한 활동자료는 농림수산식품부의 농림수산식품통계연보를 활용하였고, 배출계수는 1996 IPCC와 2006 IPCC에서 제시하고 있는 기본계수를 활용하였다. 직접배출량을 질소 투입원별로 산정한 결과 논과 밭에서 화학비료 시용에 의한 $N_2O$ 배출량은 각각 159,579 $CO_2$-eq Mg과 976,460 $CO_2$-eq Mg이었고, 축산분뇨 시용에 따른 $N_2O$ 배출량은 1,465,363 $CO_2$-eq Mg이었다. 두과작물의 질소 고정에 따른 $N_2O$ 배출량은 52,395 $CO_2$-eq Mg이었고, 작물잔사 환원에 의한 $N_2O$ 배출량은 14,562 $CO_2$-eq Mg 이었다. 간접배출에 의한 $N_2O$ 배출량을 대기 유출과 수계 유출로 구분하여 산정된 양은 각각 1,415,881 $CO_2$-eq Mg과 1,864,043 Mg이었다. 우리나라 농경지의 $N_2O$ 총배출량은 5,948,284 $CO_2$-eq Mg으로 직접배출량은 44.9%, 간접배출량은 55.1%를 차지하였으며, 경종부문 온실가스 전체 배출량의 48.7%를 점유하였다.

Keywords

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