Table 5.

Effect of energy level and β-mannanase supplementation on the performance of growing pigs (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 1 to 14
Weight gain (g/d)	623	696	637	690	29.87	0.88	0.05	0.74
Feed intake (g/d)	1677	1631	1,509	1,474	51.96	<0.01	0.45	0.92
Feed efficiency	372	428	427	469	22.87	0.05	0.05	0.75
Day 15 to 28
Weight gain (g/d)	668	826	708	905	40.51	0.16	<0.01	0.63
Feed intake (g/d)	1,995	1,963	1,850	1,690	23.93	<0.01	0.10	0.27
Feed efficiency	334	424	383	516	26.04	0.01	<0.01	0.37
Day 1 to 28
Weight gain (g/d)	645	761	672	798	27.56	0.26	<0.01	0.86
Feed intake (g/d)	1,836	1,798	1,679	1,582	41.13	<0.01	0.11	0.49
Feed efficiency	353	424	401	505	18.12	<0.01	<0.01	0.38

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

²SEM = Standard error of the mean.