Table 1. Cumulative N₂O fluxes and estimated GWP (global warming potential) under different fertilization treatments in the rice-wheat cropping system.

	Treatment	N2O		Integrated greenhouse effect kg CO2 ha-1	GWP CO2-eqkg ha-1
		Total emission mg m-2	Greenhouse effect kg CO2 ha-1
Wheat	CK	-33.73±2.43b	-100.51±12.1b	-33.95±2.98b	-0.03±0.01b
	CF	102.41±14.8a	305.18±19.9a	473.72±9.43a	0.26±0.03a
	OF	115.90±12.9a	345.39±15.7a	504.41±13.5a	0.21±0.02a
	SRF	96.44±5.3a	287.40±11.3a	379.22±7.65a	0.17±0.01a
	OF+UI	79.73±4.4a	237.61±9.5a	384.17±5.98a	0.15±0.01a
	OF+CT	99.3±3.45a	295.8±14.6a	395.98±12.87a	0.8±0.02a
	CF+SI	89.4±9.2b	277.18±7.41b	359.43±8.98b	0.16±0.01b
	CF+DI	97.43±16.3a	290.76±9.72a	390.98±14.65a	0.20±0.02a
Rice	CK	19.99±1.32b	59.57±3.89b	6122.07±22.98a	1.04±0.01a
	CF	74.55±5.76a	222.16±8.90a	8774.66±36.12a	1.17±0.03a
	OF	92.23±9.67a	274.85±11.3a	9102.35±43.32a	1.20±0.02a
	SRF	71.99±5.43a	214.53±9.43a	8177.03±28.65a	1.15±0.01a
	OF+UI	54.87±4.33a	163.51±5.87a	7906.01±22.36a	1.00±0.01a
	OF+CT	86.98±5.98a	265.89±7.43a	7995.78±27.98a	1.18±0.02a
	CF+SI	62.67±5.98a	203.67±9.98a	8069.61±32.65a	1.14±0.01a
	CF+DI	85.32±9.76a	240.98±12.87a	8976.54±28.98a	1.15±0.01a

Lowercase letters indicate significant differences between treatments (P<0.05), and while capital letters indicate significant differences between treatments (P<0.01); ± show the standard errors (n = 3) of the replications.