. 2022 Mar 17;10:54–67. doi: 10.1016/j.aninu.2022.01.009

Table 6.

Effects of subclinical necrotic enteritis challenge, diet type and supplemental enzymes on relative organ weights (% of live body weight) of broilers at 16 and 21 d of age.¹^,²

Challenge	Enzyme	Empty gizzard		Abdominal fat pad
Challenge	Enzyme	d 16	d 21	d 16	d 21
Two-way interaction
No	Control	2.15	1.81	0.94^ab	0.77
	XYN10	2.22	1.87	1.00^a	0.81
	XYN11	2.23	1.93	0.89^abc	0.87
	MAN	2.27	1.93	0.93^abc	0.85
Yes	Control	2.20	1.90	0.77^c	0.74
	XYN10	2.16	2.01	0.82^bc	0.79
	XYN11	2.21	2.03	0.87^abc	0.80
	MAN	2.27	1.98	0.85^abc	0.72
Main effects
Challenge	No	2.22	1.88^b	0.09	0.83^a
Challenge	Yes	2.21	1.98^a	0.83	0.76^b
Diet type	Wheat	2.11^b	1.85^b	0.81^b	0.71^b
Diet type	Maize	2.32^a	2.02^a	0.96^a	0.87^a
Enzyme	Control	2.18	1.85^b	0.85	0.75^b
	XYN10	2.19	1.94^ab	0.91	0.80^ab
	XYN11	2.22	1.98^a	0.88	0.84^a
	MAN	2.27	1.96^ab	0.88	0.78^ab
SEM³		0.018	0.017	0.015	0.012
P-value
Challenge		0.725	<0.001	<0.001	<0.001
Diet type		<0.001	<0.001	<0.001	<0.001
Enzyme		0.101	0.011	0.319	0.005
Challenge × diet type		0.166	0.547	0.398	0.174
Challenge × enzyme		0.597	0.709	0.045	0.080
Diet type × enzyme		0.337	0.824	0.548	0.757
Challenge × diet type × enzyme		0.338	0.853	0.784	0.316

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

Means are based on 6 replicates per treatment with 4 birds per replicate on d 16 and 3 birds per replicate on d 21.

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

SEM = standard error of the mean.