Table 2. Effective degradation of major nutrient composition (DM, NDF, ADF, CP) and degradation parameters (a,b,c) of corn stover and grain harvested at different periods

	Corn stover			Corn grain			SEM	Effects
	Early	Mid	Late	Early	Mid	Late	SEM	Harvest (H)	Fraction (F)	H × F
a	25.44^D	23.77^E	18.39^F	40.84^A	39.60^B	37.28^C	1.28	***	***	**
b	17.96^D	19.89^D	29.67^C	36.26^B	34.17^B	35.46^A	4.09	**	***	**
c	0.03^BC	0.05^A	0.02^C	0.04^BC	0.06^A	0.04^C	0.00	*	NS	NS
EDDM	35.53^C	37.05^C	32.01^D	57.13^A	57.02^A	53.00^B	3.44	**	***	NS
a	8.88^A	4.59^B	3.4^C	6.23^B	7.65^A	2.14^C	1.29	***	NS	***
b	20.71^A	22.19^B	19.59^B	39.00^A	19.58^B	24.24^B	4.78	***	***	***
c	0.03^B	0.03^A	0.05^A	0.02^B	0.06^A	0.05^A	0.00	***	NS	*
EDNDF	20.17^A	17.10^AB	16.55^B	17.24^A	17.92^AB	14.34^B	3.19	*	NS	NS
a	11.70^A	3.89^B	3.49^B	13.31^A	6.12^B	1.83^B	1.64	***	NS	**
b	16.38	20.82	14.75	11.01	11.41	16.47	4.06	NS	**	**
c	0.03^C	0.03^BC	0.09^B	0.08^B	0.13^AB	0.08^A	0.03	*	***	***
EDADF	20.12^A	14.34^B	14.97^B	19.88^A	14.19^B	11.99^B	2.96	***	NS	NS
a	53.43^C	60.49^B	66.16^A	28.65^F	39.69^E	40.52^D	1.15	***	***	***
b	18.65^C	16.20^D	13.24^D	55.66^A	33.24^B	33.00^B	3.11	***	***	***
c	0.05^AB	0.03^B	0.06^A	0.02^CD	0.01^D	0.02^C	0.00	*	***	NS
EDCP	65.48^C	69.06^B	75.32^A	43.35^F	46.53^E	50.43^D	2.38	***	***	NS

Means in the same row with different superscripts are significantly different.
p < 0.05,
p < 0.01,
p < 0.001.
DM, dry matter; NDF, neutral detergent fiber; ADF, acid detergent fiber, CP, crude protein; SEM, standard error of means, NS, not significant; EDDM, effective degradability of dry matter; EDNDF, effective degradability of neutral detergent fiber; EDADF, effective degradability of acid detergent fiber; EDCP, effective degradability of crude protein; a, b, c in first column corresponds to: a, highly soluble fraction of sample; b, insoluble and slowly soluble fraction of sample at time infinity; c, rate constant of degradation of fraction “b.”