2024 Volume 80 Issue 25 Article ID: 24-25031
Effect of irrigation management when using treated municipal wastewater to cultivate forage rice on emission was analyzed by applying DNDC-Rice model, which simulates the dynamics of biochemical reaction in the soil, to find out effective irrigation condition for reducing GHG emission. According to the model analysis, nitrous oxide emission increased when mid-season drainage was done twice or triple. Methane emission decreased conversely, and total GHG emission converted to equivalent CO2 emission by multiplying GWP of methane and nitrous oxide has also decreased. It was also found that methane emission and total GHG emission decreased if nitrogen included in WWTP was consist of nitrate nitrogen, not ammonia nitrogen. It was shown that GHG emission from paddy field for cultivating forage rice with WWTP effluent could be reduced when irrigation condition was changed compared to conventional irrigation.
