Table 6.

Effect of protein source and xylanase supplementation on the ADG, ADFI, and gain to feed ratio (G:F) of weaned pigs¹

Traits	Least square means for main effects
	Protein source effect				Xylanase effect		Protein × xylanase interaction
							Without xylanase				With xylanase				SEM	P-value
	SBM	RCM	DCM	CCM	with	w/o	SBM	RCM	DCM	CCM	SBM	RCM	DCM	CCM
Initial BW2,3	6.27	6.19	6.23	6.32	6.26	6.24	6.28	6.17	6.15	6.26	6.22	6.28	6.29	6.10	0.07	0.391
Final BW	22.22	21.39	21.42	21.26	21.55	21.61	22.62	21.31	21.66	21.88	22.72	21.12	22.84	21.17	0.86	0.865
ADG, g/d/pig
Week 1	103	98	86	83	92	93	105	100	92	76	102	96	81	90	12.12	0.775
Week 2	344	314	308	314	322	318	349	302	301	319	343	325	314	311	31.16	0.925
Week 3	505	467	431	453	453	453	526	456	399	475	515	454	472	450	19.61	0.885
Week 4	561	581	564	578	570	572	558	597	554	579	571	567	581	578	41.77	0.938
Week 5	744	733	762	693	713	752	729	776	782	720	787	691	792	665	58.14	0.648
ADFI, g/day/pig
Week 1	151	158	137	141	142	151	160	161	159	130	143	155	118	153	10.11	0.012
Week 2	417	393	384	408	394	407	425	388	396	419	414	398	372	399	41.79	0.953
Week 3	746	697	670	696	702	703	778	686	629	719	750	682	741	702	37.78	0.862
Week 4	853	893	877	926	916	858	839	946	933	950	880	840	830	896	61.72	0.491
Week 5	1,160	1,162	1,135	1,190	1,153	1,171	1,164	1,195	1,112	1,226	1,215	1,124	1,175	1,156	90.01	0.812
G:F
Week 1	0.67	0.62	0.64	0.60	0.61	0.65	0.65	0.63	0.60	0.58	0.72	0.61	0.68	0.61	0.09	0.922
Week 24	0.82	0.81	0.79	0.77	0.81	0.78	0.82	0.79	0.76	0.76	0.83	0.82	0.85	0.78	0.04	0.532
Week 3	0.68	0.67	0.65	0.65	0.66	0.66	0.69	0.66	0.62	0.67	0.68	0.67	0.69	0.64	0.03	0.752
Week 45	0.66	0.65	0.65	0.63	0.66	0.63	0.66	0.63	0.61	0.61	0.65	0.68	0.69	0.64	0.02	0.387
Week 5	0.64	0.63	0.69	0.59	0.63	0.65	0.64	0.63	0.71	0.60	0.66	0.62	0.66	0.58	0.02	0.791

¹Based on the MIXED procedure analysis. Fixed effects included protein source, xylanase, sex, two- and three-way interactions. Random effects included block and interactions of block with the three fixed effects. Single-sex pens were used, 3 pens per sex.

²Sex effect for initial BW (6.32 and 6.19 for barrows and gilts, respectively P < 0.05; SEM 0.03).

³Protein × sex interaction for initial BW (P < 0.005).

⁴Tendency (P < 0.10) in the G:F interaction xylanase × sex in week 2.

⁵Tendency (P < 0.10) in the G:F xylanase effect in week 4.