Table 5.

Univariate analysis of stimulating effects (SEs) according to grassland type, incubation temperature, and substrate addition.

	SE1 day*		SE7 day		SE56 day
	F	P	F	P	F	P
Grassland type (G)	21.37	<0.0001	188.44	<0.0001	79.36	<0.0001
Temperature (T)	417.12	<0.0001	2979.44	<0.0001	216.82	<0.0001
Substrate addition (S)	553.31	<0.0001	4740.99	<0.0001	1042.76	<0.0001
G × T	2.97	<0.0001	94.07	<0.0001	32.68	<0.0001
G × S	5.04	<0.0001	198.83	<0.0001	79.40	<0.0001
T × S	99.79	<0.0001	1648.51	<0.0001	355.05	<0.0001
G × T × S	1.69	0.0082	87.02	<0.0001	37.82	<0.0001

^*SE_{1 day}, SE_{7 day}, and SE_{56 day} represent the stimulating effect of substrates added in 1-, 7-, and 56-day incubations, respectively, which were calculated from the accumulated C mineralization for different substrates (GLU, GRA, and MED) divided by that of CK.