Table 6.

Effect of energy level and β-mannanase supplementation on apparent total tract digestibility (Exp. 2)¹

	3,250 kcal/kg DE		3,400 kcal/kg DE		SEM2	p-value
	0 U/kg mannanase	400 U/kg mannanase	0 U/kg mannanase	400 U/kg mannanase		Energy	Enzyme	Interaction
Day 13 and 14
Dry matter	77.39	79.42	78.80	82.62	0.49	<0.01	<0.01	0.09
Crude protein	66.64	69.95	67.73	73.78	0.96	0.02	<0.01	0.17
Neutral detergent fiber	44.94	57.83	53.43	56.98	1.89	0.04	<0.01	0.07
Acid detergent fiber	45.16	54.18	53.93	57.86	2.13	0.01	0.01	0.24
Calcium	37.75	43.94	37.12	43.52	2.81	0.84	0.03	0.97
Phosphorus	37.88	42.26	41.15	48.60	1.75	0.01	<0.01	0.38
Gross energy	77.62	78.56	79.52	82.78	0.63	<0.01	<0.01	0.08
Day 27 and 28
Dry matter	77.51	79.10	79.35	82.90	0.92	0.01	0.01	0.30
Crude protein	70.15	72.63	72.72	77.63	1.73	0.04	0.05	0.49
Neutral detergent fiber	52.37	57.32	56.84	62.82	2.02	0.01	<0.01	0.73
Acid detergent fiber	48.18	53.38	53.24	57.97	2.24	0.03	0.02	0.75
Calcium	37.85	43.48	39.53	47.21	2.01	0.19	0.01	0.96
Phosphorus	42.18	43.59	44.09	47.41	1.05	0.01	0.03	0.37
Gross energy	77.66	79.46	80.23	83.27	0.96	<0.01	0.02	0.53

¹Value represent means of six pens with six pigs per pen.

²SEM = Standard error of the mean.