Table 4.

Effect of added Cu and diet type on growth performance and carcass characteristics of finishing pigs¹

Added Cu,2 mg/kg:	0		150		SEM	Probability, P <
Diet type:	Corn-soy	By-product3	Corn-soy	By-product3		Cu × diet type	Cu	Diet type
Growth performance
BW, kg
Day 0	27.6	27.6	27.6	27.6	0.63	1.000	0.954	0.988
Day 45	65.6	64.0	66.3	64.9	1.02	0.776	0.082	0.004
Day 117	125.4	125.6	127.7	126.1	1.42	0.419	0.237	0.567
Day 0 to 45
ADG, kg	0.84	0.81	0.86	0.83	0.012	0.874	0.076	0.001
ADFI, kg	1.70	1.67	1.76	1.68	0.029	0.221	0.114	0.009
G:F	0.497	0.483	0.490	0.493	0.006	0.147	0.771	0.303
Day 45 to 117
ADG, kg	0.85	0.87	0.88	0.87	0.015	0.207	0.504	0.551
ADFI, kg	2.68	2.72	2.70	2.75	0.039	0.881	0.519	0.224
G:F	0.318	0.321	0.324	0.315	0.004	0.060	0.946	0.414
Day 0 to 117
ADG, kg	0.85	0.85	0.87	0.85	0.010	0.311	0.191	0.269
ADFI, kg	2.29	2.31	2.32	2.32	0.029	0.814	0.376	0.824
G:F	0.370	0.368	0.374	0.366	0.003	0.356	0.705	0.114
Caloric efficiency4
ME	8.94	9.16	8.84	9.20	0.084	0.345	0.720	0.001
NE	6.80	7.13	6.72	7.16	0.064	0.346	0.723	0.001
Carcass characteristics
HCW, kg	93.8	92.1	95.4	93.2	1.21	0.776	0.195	0.067
Carcass yield, %	74.28	73.12	74.37	73.26	0.370	0.953	0.752	0.007
Backfat depth,5 mm	18.7	18.1	18.7	18.1	0.44	0.910	0.951	0.192
Loin depth,5 mm	66.7	63.7	65.3	65.9	1.14	0.135	0.719	0.349
Lean,5 %	55.48	55.50	55.24	55.76	0.282	0.389	0.900	0.435
Carcass performance
HCW ADG, kg	0.63	0.61	0.64	0.62	0.009	0.766	0.173	0.056
HCW G:F	0.272	0.265	0.275	0.267	0.003	0.910	0.432	0.011

¹A total of 757 pigs (PIC 337 × 1050; initially 27.6 kg BW) were used in a 117-d experiment with 26 to 28 pigs per pen and 7 replications per treatment.

²Tri-basic copper chloride (Intellibond C; Micronutrients, Inc., Indianapolis, IN).

³Refers to a diet containing 30% distillers dried grains with solubles (DDGS) and 15% bakery meal.

⁴Caloric efficiency is expressed as kcal of intake per kg of live weight gain.

⁵Hot carcass weight was used as a covariate.