Rumen degradation and nutritive utilization of wheat straw, corn stalks and sugarcane bagasse ensiled with multienzymes

Figures & data

Table 1. Effect of ensiling wheat straw, corn stalks and sugarcane bagasse with a fibrolytic EZ for 30 days on nutrient content (%).

Feed	Enzyme level	DM	OM	EE	NFE	CF	NDF	ADF	ADL
Wheat straw	0	85.53	80.00	1.50	32.33	42.67	64.07	45.70	11.33
	1	85.74	78.18	1.75	25.27	40.03	62.73	44.51	10.78
	3	86.41	80.87	1.88	27.32	39.45	62.90	44.53	10.68
	SEM	10.07	9.27	0.18	3.31	4.72	7.29	5.20	1.32
	Linear	.5592	.53	<.0001	<.0001	.003	.3013	.1625	.0129
	Quadratic	.8541	.0939	.0402	<.0001	.124	.4314	.3785	.2006
Corn stalks	0	87.90	90.27	2.02	48.87	35.06	61.63	43.16	9.79
	1	87.21	77.30	2.14	36.56	26.13	57.16	39.16	7.88
	3	87.40	75.65	3.05	33.64	24.00	56.10	38.21	7.44
	SEM	9.01	8.36	0.26	4.14	2.97	6.00	4.14	0.87
	Linear	.7101	<.0001	<.0001	<.0001	<.0001	.0006	.0001	<.0001
	Quadratic	.7028	.0015	<.0001	<.0001	<.0001	.0591	.0238	.0005
Sugarcane bagasse	0	92.94	98.49	1.72	44.55	50.55	71.64	51.49	13.21
	1	88.65	90.93	3.40	45.07	35.28	64.01	44.66	9.96
	3	86.53	88.75	3.82	39.13	31.60	62.17	43.02	9.17
	SEM	9.20	9.54	0.33	4.43	4.11	6.79	4.79	1.12
	Linear	.0026	.0004	<.0001	.0001	<.0001	<.0001	<.0001	<.0001
	Quadratic	.3719	.0607	<.0001	.001	<.0001	.0132	.0045	.0001
Pooled SEM		5.03	4.81	0.14	2.10	2.12	3.57	2.51	0.59
P value
Feed		<.0001	<.0001	<.0001	<.0001	<.0001	<.0001	<.0001	<.0001
Enzyme level:
Linear		.0027	<.0001	<.0001	<.0001	<.0001	<.0001	<.0001	<.0001
Quadratic		.5175	<.0001	<.0001	<.0001	<.0001	<.0001	.0004	<.0001
Feed × enzyme level		.0132	<.0001	<.0001	<.0001	<.0001	<.0001	<.0001	<.0001

Abbreviations: DM, dry matter; OM, organic matter; CP, crude protein; EE, ether extract; NFE, nitrogen-free extract; CF, crude fibres; NDF, neutral detergent fibre; ADF, acid detergent fibre; ADL, acid detergent lignin; SEM, standard error of the mean.

Table 2. Effect of ensiling wheat straw, corn stalks and sugarcane bagasse with a fibrolytic EZ for 30 days on in vitro digestion of dry matter and fibre fractions.

Feed	Enzyme level	DM^d biodegradability^e				NDF^d biodegradability^e		ADF^d biodegradability^e
		a	b	a + b	c	b	c	b	c
Wheat straw	0	17.90	37.17	57.87	2.67	39.93	1.97	41.80	2.77
	1	23.25	42.53	66.77	3.58	44.32	2.38	45.91	3.28
	3	28.12	46.41	78.80	4.87	46.90	2.78	49.29	3.78
	SEM	2.83	5.13	8.32	0.47	5.33	0.31	5.60	0.39
	Linear	<.0001	<.0001	<.0001	<.0001	<.0001	<.0001	<.0001	<.0001
	Quadratic	.5144	.2816	.1769	.0169	.2173	.835	.6153	.9209
Corn stalks	0	12.71	37.53	47.83	2.38	43.28	2.23	40.50	2.57
	1	13.48	39.79	50.70	2.52	45.88	2.36	42.94	2.73
	3	14.29	42.18	53.75	2.67	48.63	2.50	45.51	2.89
	SEM	1.40	4.10	5.23	0.25	4.73	0.26	4.43	0.29
	Linear	.0002	.0002	.0002	.0002	.0002	.0003	.0002	.0002
	Quadratic	.8959	.8962	.8968	.8761	.899	.9593	.8992	.964
Sugarcane bagasse	0	11.49	35.85	44.86	2.28	41.69	2.28	40.90	2.67
	1	12.06	37.64	47.11	2.39	43.78	2.39	42.95	2.81
	3	12.67	39.52	49.46	2.51	45.97	2.51	45.10	2.95
	SEM	.1.24	3.88	4.86	0.26	4.51	0.26	4.43	0.29
	Linear	.0005	.0005	.0005	.0006	.0005	.0006	.0005	.0005
	Quadratic	.9162	.9304	.9293	.9593	.9308	.9593	.9272	.964
Pooled SEM^f		1.03	2.31	3.32	0.18	2.54	0.14	2.52	0.17
P value
Feed		<.0001	<.0001	<.0001	<.0001	<.0001	<.0001	<.0001	<.0001
Enzyme level:
Linear		<.0001	<.0001	<.0001	<.0001	<.0001	<.0001	<.0001	<.0001
Quadratic		.6477	<.0001	.3294	.0172	.4996	.9566	.8474	.9818
Feed × enzyme level		<.0001	<.0001	<.0001	<.0001	.0114	<.0001	.0029	<.0001

^dDM, dry matter; NDF, neutral detergent fibre; ADF, Acid detergent fibre.

^ea, soluble fraction; b, potentially degradable fraction; a + b, total degradation; c, degradation rate.

^fSEM, standard error of the mean.