Table 1. GWP and total changes in CH₄ and N₂O after subsoiling (2008.10∼2009.05).

Treatments	HT	HTS	RT	RTS	NT	NTS
CH4 total emission (kg·ha−1)	−0.73	−0.84	−0.64	−0.78	−0.39	−0.52
GWP of CH4 (kgCO2 ·ha−1)	−0.17	−0.19	−0.15	−0.18	−0.09	−0.12
N2O total emission (kg·ha−1)	2.14	2.42	2.26	2.46	1.46	2.67
GWP of N2O (kgCO2 ·ha−1)	0.49	0.56	0.52	0.57	0.35	0.61
Total emissions of CH4 and N2O (kg·ha−1)	1.41	1.58	1.62	1.68	1.07	2.15
GWP of CH4 and N2O (kgCO2 ha−1)	0.32	0.37	0.37	0.39	0.26	0.49
Increased emissions after conversion (kg·ha−1)	–	0.17	–	0.06	–	1.08
Increased GWP after conversion(kgCO2 ·ha−1)	–	0.05	–	0.02	–	0.23

Total emissions of CH₄ and N₂O (kg·ha⁻¹), N₂O total emission flux added CH₄ total emission flux; GWP of CH₄ and N₂O (kgCO₂·ha⁻¹), GWP of N₂O added GWP of CH₄; Increased emissions after conversion (kg·ha⁻¹), difference of total emission of CH₄ and N₂O before and after conversion; Increased GWP after conversion (kgCO₂·ha⁻¹), difference of GWP of CH₄ and N₂O before and after conversion.