Table 3.

Coefficients of ileal digestibility of nutrients in broilers fed diets supplemented with carbohydrases or prebiotic oligosaccharides

Diet type	Additive	DM	Gross energy	N	IDE (MJ kg−1)
Simple effect means
Wheat	Control (1)	0.70	0.73	0.73	13.63
	Xylanase16000 U kg−1 (2)	0.71	0.76	0.74	15.92
	Xylanase 32 000 U kg−1 (3)	0.73	0.76	0.76	14.28
	XOS (4)	0.69	0.73	0.72	14.39
Barley	Control (5)	0.67	0.72	0.71	14.38
	β‐Glucanase 16 000 U kg−1 (6)	0.63	0.70	0.67	14.63
	β‐Glucanase 32 000 U kg−1 (7)	0.66	0.72	0.70	14.71
	GOS (8)	0.72	0.72	0.71	12.70
Pooled SEM		0.009	0.008	0.011	0.148
Means for main effect of diet type
Wheat		0.71	0.74	0.74	14.56
Barley		0.67	0.71	0.70	14.10
Pooled SEM		0.004	0.004	0.006	0.074
Means for main effect of additive type
	None	0.69	0.72	0.72	14.00
	16 000 U kg−1	0.67	0.73	0.70	15.27
	32 000 U kg−1	0.70	0.74	0.73	14.50
	Oligosaccharide	0.71	0.73	0.71	13.55
Pooled SEM		0.006	0.005	0.008	0.105
P values for main effects and interaction
Diet type		<0.001	<0.001	<0.001	<0.001
Additive		<0.001	0.354	0.095	<0.001
Diet Type × additive		<0.001	0.010	0.021	<0.001
P values for contrasts
1 vs 2		0.594	0.012	0.823	<0.001
1 vs 3		0.013	0.012	0.053	0.004
1 vs 4		0.568	0.645	0.448	0.001
5 vs 6		0.001	0.105	0.008	0.239
5 vs 7		0.457	0.900	0.315	0.123
5 vs 8		<0.001	0.733	0.877	<0.001

DM, dry matter; IDE, ileal digestible energy; XOS, xylo‐oligosaccharide; GOS, galacto‐oligosaccharide; means with different subscripts within the same column and diet type are significantly different (P < 0.05).