Model the Relationship of NH3 Emission with Attributing Factors from Rice Fields in China: Ammonia Mitigation Potential Using a Urease Inhibitor

Substantial ammonia (NH3) losses from rice production result in poor nitrogen (N) use efficiency and environmental damage. A data synthesis using the published literature (127 studies with 700 paired observations), combined an incubation experiment 50 paddy soils across China, were conducted to improve current understanding of NH3 loss its drivers. The efficacy urease inhibitor Limus® for reducing was also evaluated. mean N, through volatilization, 16.2% urea-N applied rice. largest double cropping systems, increased N application rate, surface unstable types (ammonium bicarbonate urea), high floodwater pH. Under simulated flooded conditions, urea amended reduced by 36.6%, compared alone, but pH had a significant effect on efficacy. Key driving factors air temperature, effectiveness limitations emission mitigation examined, as well basis one means pollution control systems.