Table 5.

Effects of increasing Cu and source on growth performance of pigs (experiment 2)^a,b

Item	Control	Added Cu, mg/kg						SEM	Probability, P <
		TBCCc			Cu-chelated				Cu source	Cu level		Source × level
		75	150	225	75	150	225			Linear	Quadratic	Linear	Quadratic
BW, kg
d 0	5.8	5.8	5.8	5.8	5.8	5.8	5.8	0.17	0.830	0.873	0.933	0.792	0.945
d 14	9.1	9.1	9.4	9.6	9.3	9.6	9.5	0.31	0.365	0.001	0.884	0.469	0.074
d 35	21.1	21.0	21.8	22.1	21.7	22.2	21.9	0.81	0.278	0.013	0.624	0.636	0.120
d 0 to 14
ADG, g	239	236	254	266	249	269	260	12.0	0.253	0.003	0.873	0.662	0.081
ADFI, g	314	306	342	349	334	339	341	11.4	0.372	0.001	0.925	0.152	0.092
G:F	0.758	0.767	0.745	0.760	0.743	0.788	0.757	0.0202	0.706	0.865	0.848	0.446	0.604
d 14 to 35
ADG, g	569	563	587	592	574	591	582	26.5	0.848	0.148	0.963	0.579	0.443
ADFI, g	855	848	861	873	864	871	840	36.2	0.884	0.824	0.715	0.196	0.158
G:F	0.663	0.664	0.682	0.679	0.661	0.679	0.687	0.0091	0.908	0.019	0.806	0.541	0.488
d 0 to 35
ADG, g	437	432	453	460	442	461	452	20.1	0.695	0.044	0.988	0.578	0.301
ADFI, g	639	631	652	662	648	656	639	25.2	0.952	0.277	0.813	0.143	0.134
G:F	0.681	0.684	0.693	0.695	0.677	0.701	0.702	0.0098	0.696	0.052	0.869	0.402	0.796

^a A total of 665 pigs (350 barrows [DNA 200 × 400; initially 6.4 kg; 5 pigs per pen; 10 pens per treatment] in group 3 and 315 pigs [DNA 241 × 600; initially 5.2 kg; 5 pigs per pen; 9 pens per treatment] in group 4) were used in a 35-d growth studies. Data were combined across the two groups. The trace mineral premix was formulated to contribute 17 mg/kg of Cu to the complete diet.

^b Growth performance criteria include: body weight (BW), average daily gain (ADG), average daily feed intake (ADFI), and gain:feed (G:F).

^c Tri-basic copper chloride, (Intellibond C, Micronutrients USA).

^d Copper-methionine hydroxy analogue (Mintrex Cu, Novus International).