Simulation of N2O emissions from an irrigated dairy pasture treated with urea and urine in Southeastern Australia

Abstract

The irrigated dairy pasture system in Australia is a high input-high output production system associated with intensive irrigation and nitrogen (N) fertilizer applications. The environmental impacts of such systems are attracting increasing attention in terms of greenhouse gas emissions, such as carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O). In this study, the daily and total chamber-measured N2O emissions from an intensively-irrigated pasture grown on a clay loam-textured soil for non-fertilized (CK), urea and urine treated plots at Kyabram in Southeastern Australia were measured over a period of 20 months and compared with the predictions by a process-based agroecosystems mod..