Managing fertilizers and water treatments on rice production and N2O emission

Abstract

Addressing issues about climate change and higher food demand requires improve management practices. Fertilizer and water input are the critical resources to ensure high yield and low impact to environment in paddy field. The aim of this study was to determine whether higher grain yield and lower nitrous oxide (N2O) emission can be achieved by managing fertilizer and water input. A field experiment was conducted during rice paddy season under conventional practice (CP) that comprised of farmer practice and continuous flooded. In contrast to CP, balanced fertilizer application and intermittent irrigation was applied for another treatment that namely technology introduction (TI). Results showed that the average of seasonal N2O in the TI treatment decreased by 54% compared with the CP treatment. Aerobic–anaerobic increased in N2O emissions. Lower N2O emission at higher rate of N fertilization. Those findings indicated that enhancing rice production and mitigating GHG emission under application of balanced fertilizer and proper water management from paddy field can contribute to sustainable agriculture.