Table 8.

Effects of subclinical necrotic enteritis challenge, diet type and supplemental enzymes on apparent ileal nutrient digestibility (%) in broilers at 16 d of age.^1,2

Challenge	Diet type	Enzyme	Dry matter	N	Starch	Soluble NSP	Insoluble NSP	Oligo-saccharides
Two-way interactions
No	Wheat		63.2	79.2	95.8b	−64.9	−48.7	−16.4
	Maize		67.1	78.5	97.1b	−36.9	−75.3	−8.3
Yes	Wheat		55.9	77.5	91.6a	−74.2	−41.1	6.1
	Maize		63.0	77.4	96.2b	−67.6	−73.2	15.3
	Wheat	Control	58.6	76.6	92.8	−89.9c	−57.7	−1.5
		XYN10	60.5	79.9	94.8	−84.8bc	−39.7	−4.6
		XYN11	61.2	78.1	95.3	−45.3ab	−45.1	−10.2
		MAN	58.0	78.9	91.9	−58.1abc	−37.1	−4.4
	Maize	Control	65.1	77.4	96.3	−38.9a	−80.9	9.7
		XYN10	65.2	78.5	96.6	−53.7abc	−72.2	−8.2
		XYN11	64.5	77.0	96.7	−66.5abc	−66.8	−3.5
		MAN	65.2	78.9	97.0	−50.0abc	−77.2	16.1
Main effects
Challenge		No	65.1a	78.8	96.5	−50.9a	−62.6	−12.3b
		Yes	59.5b	77.5	93.9	−70.9b	−57.2	10.7a
Grain type		Wheat	59.6b	78.4	93.7	−69.5	−44.9a	−5.2b
		Maize	65.0a	78.0	96.7	−52.3	−74.9b	3.5a
Enzyme		Control	61.8	77.0	94.5	−64.4	−67.9b	4.1
		XYN10	62.9	79.2	95.7	−69.3	−55.9ab	−6.4
		XYN11	65.9	77.5	96.0	−55.9	−63.3ab	−6.9
		MAN	61.6	78.9	94.5	−54.0	−52.4a	5.9
SEM3			0.07	0.44	0.36	3.61	2.58	2.50
P-value
Challenge			<0.001	0.136	<0.001	0.002	0.207	<0.001
Diet type			<0.001	0.650	<0.001	0.006	<0.001	0.048
Enzyme			0.817	0.268	0.151	0.265	0.047	0.072
Challenge × diet type			0.185	0.756	0.006	0.087	0.614	0.902
Challenge × enzyme			0.751	0.622	0.488	0.962	0.660	0.970
Diet type × enzyme			0.646	0.829	0.097	<0.001	0.583	0.271
Challenge × diet type × enzyme			0.774	0.847	0.847	0.611	0.129	0.409

^a-c Within a column, means with no common superscripts differ significantly (P < 0.05).

¹Means are based on 6 replicates per treatment with 4 birds per replicate.

²Control = no enzyme; XYN10 = xylanase from family 10; XYN11 = xylanase from family 11; MAN = β-mannanase.

³SEM = standard error of the mean.