Korean Journal of Soil Science and Fertilizer ISSN:0367-6315(Print) 2288-2162(Online) 한국토양비료학회 학회지

This study was conducted to evaluate the effect of GHGs emission reduction with land use change of paddy field. For this we developed the evaluation methodology to calculate the GHGs emission reduction from land. At first, procedure of ETS (emission trading system) methodology on land use change of paddy field was developed. Second, system boundary for each land use was defined. Finally, evaluation methodology on GHGs emission reduction was established. The amounts of GHGs emission reduction on land use change of paddy field was evaluated as difference between baseline emission (BE) and project emission (PE). The system boundary of BE were ① CH₄ emission from anaerobic decomposition of organic material in rice field (BE_CH4), ② N₂O emission from N fertilizer application (BE_N2O), and ③ CO₂ emission from farming machine use (BE_CO2). Those of PE were ① N₂O emission from N fertilizer application (PE_N2O) and ② CO₂ emission from farming machine use (PE_CO2). At the evaluation on PE, methan emission was excluded, which was generated usually at anaerobic condition of paddy. Emission amounts of each gas was converted as carbon dioxide with multiplying global warming potential (GWP).

Evaluation methodology on GHGs emission reduction on land use change of paddy field.

GWP : Global Warming Potential, A : cultivation area (ha), EF_CH4 : methane emission factor from rice field (kg CH₄ ha^-1yr^-1), EF_N2O : nitrous oxide emission factor with N fertilizer application (kg N₂O ha^-1yr^-1), EF_CO2 : carbon dioxide emission factor with farming machine use (kg CO₂ ha^-1yr^-1)