TABLE 3.

Results from t-test of sensitivity of soil respiration and its components to drought imposed in early-, mid-, and late growing season, respectively.

		Graminoid						Shrub						Graminoid × Shrub
	df	Early		Middle		Late		Early		Middle		Late		Early		Middle		Late
		t	P	t	P	t	P	t	P	t	P	t	P	t	P	t	P	t	P
Soil respiration (Rs)	2	3.27	0.08	10.69	< 0.01	1.49	0.27	1.13	0.38	79.95	< 0.01	1.90	0.20	−4.02	0.06	23.58	< 0.01	8.65	0.01
Autotrophic respiration (Ra)	2	1.08	0.39	4.16	0.05	8.41	0.01	0.66	0.58	2.94	0.09	2.16	0.16	−1.51	0.27	4.15	0.05	12.88	< 0.01
Heterotrophic respiration (Rh)	2	2.12	0.17	9.85	0.01	1.13	0.38	7.42	0.02	16.89	< 0.01	2.38	0.14	−0.56	0.63	7.94	0.02	2.97	0.10

Bold values indicated significant differences at p < 0.05.