Integrated Plant Nutrient Systems Improve Rice Yields without Affecting Greenhouse Gas Emissions from Lowland Rice Cultivation

Efficient management of fertilizers and irrigation could mitigate greenhouse gas (GHG) emissions increase crop yields. Field experiments were conducted to determine the effects an integrated plant nutrient system (IPNS) water regime—alternate wetting drying (AWD) continuous flooding (CF)—on GHG rice yield. Fertilizer treatments included control (no N), prilled urea (PU), deep placement (UDP), IPNS (50% N from poultry litter 50% PU). Gas sampling analysis performed using a closed-chamber technique chromatography. produced significantly (p < 0.05) higher seasonal total methane (CH4) (9–15%) compared UDP treatment, but with similar those PU. had interaction effect regime on nitrogen oxide (N2O) emissions. more than PU under AWD, their CF irrigation. global warming potential (GWP) GWP treatment in both Aus (pre-monsoon) Aman (wet) seasons. AWD reduced by 8% over without yield reductions. increased yields broadcast UDP. These findings suggest that be effective increasing