논에서 SRI 물관리 방법에 의한 온실가스와 관개용수 저감효과 분석

Water management impacts both methane (CH 4 ) and nitrous oxide (N 2 O) emissions from rice paddy fields. Although irrigation is one of the most important methods for reducing CH 4 emission in rice production systems it can also N 2 O emissions and reduce crop yields. A feasibility study on the system of rice intensification (SRI) methods with respect to irrigation requirements, greenhouse gas (GHG) emissions was conducted for either 2 or 3 years depending on the treatment in Korea. The SRI methods (i.e. SRI and midsummer drainage (MD) with conventional practice (CT)) reduced the irrigation requirement by 49.0 and 22.0 %, respectively. Global warming contribution of GHG to different depending on the type of GHG. Therefore, the emission of CH 4 and N 2 O shall be converted to Global Warming Potential (GWP). The GHG emission from the conventional practice with midsummer drainage (MD) and the SRI plots, in GWP were reduced by 49.1 and 77.1 %, respectively. Application of SRI water management method could help to improve Korea’s water resources and could thus contribute to mitigation of the negative effects of global warming.