우리나라 농경지에서의 N₂O 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 N₂O 배출량은 각각 159,579 CO₂-eq Mg과 976,460 CO₂-eq Mg이었고, 축산분뇨 시용에 따른 N₂O 배출량은 1,465,363 CO₂-eq Mg이었다. 두과작물의 질소 고정에 따른 N₂O 배출량은 52,395 CO₂-eq Mg이었고, 작물잔사 환원에 의한 N₂O 배출량은 14,562 CO₂-eq Mg 이었다. 간접배출에 의한 N₂O 배출량을 대기 유출과 수계 유출로 구분하여 산정된 양은 각각 1,415,881 CO₂-eq Mg과 1,864,043 Mg이었다. 우리나라 농경지의 N₂O 총배출량은 5,948,284 CO₂-eq Mg으로 직접배출량은 44.9%, 간접배출량은 55.1%를 차지하였으며, 경종부문 온실가스 전체 배출량의 48.7%를 점유하였다.
This study was conducted to assess N₂O emissions in agricultural soils of Korea. According to 1996 and 2006 IPCC (Intergovernmental Panel on Climate Change) methodology, N₂O emission was calculated the sum of direct emission (N₂O DIRECT) and indirect emission (N₂O INDIRECT). To calculate N₂O 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 N₂O 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 N₂O into CO₂ equivalent was 2,668 CO₂-eq Gg. Indirect emission as N₂O(G) (atmospheric deposition of NH3 and NOX) and N₂O(L) (leaching and runoffs) were 4,567 and 6,013 N₂O Mg and emissions converted N₂O into CO₂ equivalent were 1,416 and 1,864 CO₂-eq Gg, respectively. Total N₂O emission in Korea agricultural soil in 2009 was 5,948 CO₂-eq Gg.