Importance of climate change and its impact on agriculture and environment has increased with the rise in the levels of Green House Gases (GHGs) in the atmosphere. To slow down the speed of climate change, numerous efforts have been applied in industrial sectors to reduce GHGs emission and to enhance carbon storage. In the agricultural sector, several types of research have been performed with emphasis on GHGs emission reduction; however, only a few work has been done in understanding the role of carbon sink on reduction in GHGs emission. In this study, we investigated ecosystem carbon balance and soil carbon storage in an agricultural paddy field. The results obtained were as follows: 1) Evaluation of soil C sequestration in paddy field was average 3.88 Mg CO2 ha-1 following NPK+rice straw compost treatment, average 3.22 Mg C ha-1 following NPK+hairy vetch treatment, and average 1.97 Mg CO2 ha-1 following NPK treatment; and 2) Net ecosystem production (NEP) during the paddy growing season was average 14.01 Mg C ha-1 following NPK+hairy vetch treatment, average 12.60 Mg CO2 ha-1 following NPK+rice straw compost treatment, and average 11.31 Mg CO2 ha-1 following NPK treatment. Therefore, it is proposed that organic matter treatment can lead to an increase in soil organic carbon accumulation and carbon sock of crop ecosystem in fields compared to chemical fertilizers.

탄소흡수원으로써의 산림부문의 중요성이 점차 증가함에 따라 다양한 정책들이 고려되고 있다. 제한된 예산과 자원 여건 하에서 정책의 효율성을 추구하기 위하여 본 연구에서는 최고최저조정법을 이용하여 산림청의 10대 산림 탄소흡수원 증진 정책들의 우선순위를 결정하였다. 산림 분야 전문가 설문조사 결과, 산림경영방식 및 시업체계 개선, 조림 및 식생복구 확대, 산림바이오매스 에너지 활용 및 이용시설 증대, 임목수집 시스템 및 재활용 체계 개선, REDD+ 사업 참여 확대 순으로 중요한 것으로 나타났다. 이 연구 결과는 향후 국내 산림탄소흡수원 확충을 위한 정부 핵심 정책을 수행함에 있어서 우선순위를 정하는데 중요한 정보를 제공할 것으로 기대한다.