抄録
Global emissions of methane and nitrous oxide from agricultural sector account for approximately 85% of agricultural GHG emissions. It is necessary to determine the effectiveness of options reducing methane and nitrous oxide emissions. We estimated methane and nitous oxide emission reduction potentials in 21 regions of the world in the future, by considering options' reduction rate, the applicabilities to agricultural production systems, and the marginal abatement costs. We calculated the reduction potentials by regions and by GHG emission sources. As a result, global reduction potential in 2030 is estimated to be 350 MtCeq/yr, which is equivalent to 20.2% of the GHG emissions in the BaU case. The regions which have the highest reduction potentials are China and India. The reduction potentials of China and India account for 51.6% of the global reduction potential. Therefore, it is required that China and India play some important roles to reduce global agricultural GHG emissions. In addition, the proportion of the reduction potentials by sources varies with regions. Therefore, it is necessary to determine the most efficient options by regions and to introduce these options.
