Growth performance and total tract digestibility of nutrients for weanling pigs are improved by an exogenous xylanase and a stimbiotic regardless of maternal xylanase consumption

Table 6 Apparent total tract digestibility (ATTD) of nutrients and digestible energy by pigs^1,²

Item	Sow treatment				Post-weaning dietary treatment
Item	Control	Xylanase³	SEM	P-value	Control	Xylanase	Stimbiotic³	SEM	P-value
Phase 2 (d 26 to 28)
ATTD of dry matter, %	79.22	78.49	0.72	0.398	76.45^b	78.42^b	81.69^a	0.81	< 0.001
ATTD of gross energy, %	77.83	76.74	0.84	0.260	74.50^b	76.80^b	80.55^a	0.93	< 0.001
Digestible energy, kcal/kg	3,030	2,988	32.68	0.260	2,901^b	2,990^b	3,136^a	32.68	< 0.001
ATTD of starch, %	98.28	98.10	0.19	0.510	97.83	98.18	98.56	0.24	0.103
ATTD of crude protein, %	74.67	73.60	1.29	0.391	71.64^b	73.65^b	77.11^a	1.39	0.001
ATTD of IDF⁴, %	43.92	41.24	2.34	0.284	35.76^b	41.24^b	50.75^a	2.56	< 0.001
ATTD of SDF⁴, %	76.39	79.66	1.97	0.211	75.40	77.88	80.80	2.25	0.192
ATTD of TDF⁴, %	49.89	48.28	1.99	0.451	43.04^b	47.96^b	56.26^a	2.18	< 0.001
Phase 3 (d 40 to 42)
ATTD of dry matter, %	79.57	78.97	0.53	0.376	77.70^b	79.69^a	80.42^a	0.60	0.002
ATTD of gross energy, %	78.26	77.64	0.56	0.388	76.16^b	78.53^a	79.15^a	0.64	0.001
Digestible energy, kcal/kg	3,018	2,994	21.63	0.388	2,937^b	3,028^a	3,052^a	24.51	0.001
ATTD of starch, %	98.55	98.48	0.14	0.727	98.30	98.66	98.59	0.17	0.286
ATTD of crude protein, %	74.70	73.24	0.75	0.173	72.32^b	73.94^ab	75.65^a	0.88	0.030
ATTD of IDF, %	49.39	47.28	1.56	0.243	44.06^b	49.63^a	51.32^a	1.74	0.002
ATTD of SDF, %	66.35	67.33	4.60	0.807	67.06	66.61	66.85	4.90	0.995
ATTD of TDF, %	51.48	49.55	1.80	0.246	46.76^b	51.63^a	53.15^a	1.93	0.004

^a,bWithin columns in the post-weaning dietary treatment main effect, values within a row lacking a common superscript differ (P < 0.05)
¹Data are least square means of 24 observations per sow treatment, and 16 observations per post-weaning dietary treatment
²There was no interaction between sow treatment and post-weaning dietary treatment for any of the digestibility parameters, therefore, the interaction term was removed from the final model and only main effects are presented
³Xylanase: Econase XT 25 (160,000 BXU/g); AB Vista, Marlborough, UK; Stimbiotic: Signis; AB Vista, Marlborough, UK
⁴IDF Insoluble dietary fiber, SDF Soluble dietary fiber, TDF Total dietary fiber

ISSN: 2049-1891