Table 6.

Effects of dietary treatments on the ileal digestibility coefficients of broiler chickens at d 42 and on the intake of digestible nutrients during the finisher period.¹.

Diet2	Treatment3	Nutrient utilisation, %					Intake of digestible nutrients4, g
		Dry matter	Ash	Organic matter	Protein	Energy	Dry matter	Ash	Organic matter	Protein	Energy
PC		64.56	33.70b	66.25	70.84	67.65	1,226a	641a	1,258a	1,344	1,283a
NC1		65.62	30.65b	67.35	71.52	66.94	1,183a	549b	1,215a	1,290	1,207b
NC2		67.01	41.04a	68.45	73.96	68.95	1,121b	686a	1,145b	1,237	1,154b
	-STBIO	66.06	35.13	67.70	72.90	68.69	1,118b	590b	1,146b	1,234	1,164b
	+STBIO	65.40	35.13	67.00	71.32	67.00	1,235a	660a	1,266a	1,347	1,266a
PC	-STBIO	64.11	31.09	65.91	71.94	68.14	1,192	578	1,225	1,336a	1,265
PC	+STBIO	65.02	36.32	66.59	69.74	67.16	1,260	703	1,290	1,352a	1,301
NC1	-STBIO	66.14	32.75	67.79	71.97	67.57	1,095	540	1,123	1,192b	1,119
NC1	+STBIO	65.10	28.55	66.91	71.08	66.31	1,271	558	1,307	1,389a	1,295
NC2	-STBIO	67.93	41.56	69.40	74.78	70.37	1,067	652	1,091	1,173b	1,107
NC2	+STBIO	66.08	40.52	67.51	73.15	67.52	1,175	720	1,200	1,301a	1,200
SEM		0.54	1.14	0.53	0.61	0.64	16	19	16	17	18
P-Diet		0.203	<0.001	0.268	0.100	0.458	0.004	0.008	0.002	0.008	0.002
P-Treatment		0.551	0.998	0.525	0.197	0.203	<0.001	0.047	<0.001	<0.001	0.001
P-Interaction		0.573	0.133	0.627	0.902	0.825	0.185	0.441	0.140	0.023	0.128

^{a, b} Means with a different superscript letter differ (P < 0.05) based on t-test Student honestly significant difference test for the interaction.

¹Data are means of 4 birds per pen with 8 pens per treatment.

²Diet: PC, positive control diet; NC1, negative control 1, with a 50 kcal/kg AME reduction; NC2, negative control 2, with a 50 kcal/kg apparent metabolizable energy (AME) reduction and reducing amino acids by 3%.

³Treatment: (−) is the control treatment; (+) is the basal diet supplemented with 100 g/t of the stimbiotic, a combination of xylanase and xylo-oligosaccharide (STBIO).

⁴Based on the overall intake during the finisher period (29 to 42 d).