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 4 Growth performance of pigs^1,2

Item	Sow treatment				Post-weaning dietary treatment
Item	Control	Xylanase³	SEM	P-value	Control	Xylanase	Stimbiotic³	SEM	P-value
Phase 1 (d 1 to 14)
Initial body weight, kg	5.77	5.84	0.20	0.589	5.81	5.83	5.77	0.21	0.924
ADG⁴, g	97.44	83.95	10.79	0.196	102.40	85.17	84.54	11.65	0.235
ADFI⁴, g	171.90	171.60	8.28	0.979	182.10	165.30	167.90	8.28	0.294
G:F⁴	0.54	0.49	0.05	0.187	0.56	0.50	0.50	0.06	0.308
Final body weight, kg	7.13	7.02	0.24	0.555	7.25	7.02	6.96	0.26	0.395
Phase 2 (d 15 to 28)
ADG, g	430.60	440.50	15.54	0.542	391.70^b	434.70^b	480.20^a	16.99	< 0.001
ADFI, g	654.20	666.40	22.11	0.632	652.10	663.80	665.10	24.60	0.885
G:F	0.66	0.66	0.01	0.867	0.60^c	0.66^b	0.73^a	0.01	< 0.001
Final body weight, g	13.17	13.18	0.45	0.973	12.73^y	13.11^xy	13.68^x	0.47	0.073
Phase 3 (d 29 to 42)
ADG, g	618.10	626.10	14.95	0.701	566.80^b	648.30^a	651.20^a	17.25	0.001
ADFI, g	1,054.10	1,037.40	26.90	0.577	1,001.10^y	1,071.40^xy	1,064.60^x	29.73	0.084
G:F	0.59	0.61	0.02	0.310	0.57^y	0.61^x	0.62^x	0.02	0.098
Final body weight, kg	21.78	21.99	0.45	0.697	20.67^b	22.18^a	22.80^a	0.50	0.004
Overall (d 1 to 42)
ADG, g	381.70	383.90	8.72	0.851	353.60^b	389.40^a	405.30^a	10.04	0.001
ADFI, g	626.10	625.80	11.19	0.983	611.80	633.50	632.50	13.71	0.455
G:F	0.61	0.62	0.02	0.441	0.58^b	0.61^a	0.64^a	0.02	< 0.001

^a−cWithin columns in the post-weaning dietary treatment main effect, values within a row lacking a common superscript differ (P < 0.05)
^x,yWithin columns in the post-weaning dietary treatment main effect, values within a row lacking a common superscript tend to be different (P < 0.10)
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 growth performance 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
⁴ADG Average daily gain, ADFI Average daily feed intake, G:F Gain to feed ratio

ISSN: 2049-1891