Luo, Jvan der Weerden, TSaggar, SDi, HongPodolyan, AndriyAdhikari, KDing, KLindsey, SLuo, DOuyang, LRutherford, A2024-04-172023-11-022024-04-1720232023-10-230028-8233X1XP9 (isidoc)https://hdl.handle.net/10182/17118This study determined the nitrous oxide emission factors (EF₁, the percentage of N₂O emitted as a proportion of fertiliser N applied) for fertilisers ammonium sulphate (AS), diammonium phosphate (DAP), and urea under the same field conditions. Trials were conducted on pasture soils across four sites (Waikato, Manawatu, Canterbury and Otago) in New Zealand during late autumn and spring of 2022. The average EF₁ values for urea across all four sites were 0.128% (95% C.I., 0.023% and 0.249%) in late autumn and 0.136% (95% C.I., 0.031% and 0.259%) in spring. The corresponding EF₁ values for AS were 0.125% (95% C.I., - 0.021% and 0.246%) in late autumn and 0.083% (95% C.I., 0.015% and 0.197%) in spring, while for DAP, they were 0.049% (95% C.I., - 0.044% and 0.157%) in late autumn and 0.090% (95% C.I., -0.009% and 0.205%) in spring. The mean EF₁ values across all four sites and two seasons were calculated as 0.132% (95% C.I., 0.016% and 0.269%) for urea, 0.104% (95% C.I., - 0.008% and 0.235%) for AS, and 0.069% (95% C.I., - 0.036 and 0.194) for DAP. No significant differences in EF₁ were observed between the three fertilisers (P > 0.05) at individual sites or when considering all four sites collectively.24 pagesen© 2023 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.EF₁emission factorfertilisergreenhouse gasnitrogennitrous oxidepastureJournal Article10.1080/00288233.2023.22779161175-8775ANZSRC::300404 Crop and pasture biochemistry and physiologyANZSRC::410604 Soil chemistry and soil carbon sequestration (excl. carbon sequestration science)ANZSRC::370203 Greenhouse gas inventories and fluxesANZSRC::300411 Fertilisers (incl. application)ANZSRC::310803 Plant cell and molecular biologyANZSRC::3004 Crop and pasture productionANZSRC::3108 Plant biologyhttps://creativecommons.org/licenses/by-nc-nd/4.0/Attribution-NonCommercial-NoDerivatives