Subsurface drip irrigation mitigated N2O emission compared with drip irrigation.
Nitrogen application didn't increase N2O–N nor (N2O + N2)–N emissions.
The olive orchard acted as a net CH4 sink for all the treatments.
DMPP reduced the cumulative N2O, N2O + N2 and CO2 emission compared to the control.
The N50 + DI + DMPP treatment reduced emissions at a high yield (2737 kg oil ha− 1).