Table 4.

Effects of increasing Cu and source on growth performance of pigs (experiment 1)^a,b

Item	Control	Added Cu, mg/kg						SEM	Probability, P <
		TBCCc			Cu-chelated				Cu Source	Cu level		Source × level
		50	100	150	50	100	150			Linear	Quadratic	Linear	Quadratic
BW, kg
d 0	6.0	6.0	6.0	6.0	6.0	6.0	6.0	0.05	0.112	0.998	0.613	0.372	0.402
d 14	9.6	9.5	9.7	9.9	9.8	9.9	10.0	0.17	0.030	0.001	0.941	0.462	0.318
d 35	21.5	22.3	22.4	22.8	22.6	23.0	23.4	0.25	0.001	0.001	0.031	0.019	0.384
d 0 to 14
ADG, g	251	251	266	274	268	271	281	10.2	0.081	0.001	0.953	0.780	0.377
ADFI, g	356	353	373	374	373	373	388	14.5	0.053	0.003	0.917	0.511	0.718
G:F	0.709	0.713	0.714	0.737	0.721	0.726	0.728	0.0122	0.678	0.057	0.794	0.650	0.265
d 14 to 35
ADG, g	567	602	602	614	612	621	635	6.8	0.001	0.001	0.004	0.011	0.568
ADFI, g	841	870	861	882	888	894	901	13.6	0.009	0.001	0.159	0.167	0.222
G:F	0.675	0.693	0.7	0.698	0.692	0.696	0.707	0.0084	0.800	0.001	0.216	0.471	0.417
d 0 to 35
ADG, g	440	461	467	477	474	480	493	5.9	0.001	0.001	0.027	0.042	0.334
ADFI, g	646	662	665	678	682	684	694	9.7	0.007	0.001	0.279	0.211	0.277
G:F	0.681	0.696	0.703	0.705	0.698	0.702	0.711	0.0062	0.632	0.001	0.179	0.540	0.669

^a A total of 1,452 pigs (350 barrows [DNA 200 × 400; initially 5.9 kg; 5 pigs per pen; 10 pens per treatment] in group 1 and 1,102 pigs [PIC 1050 × 280; initially 6.0 kg; 24 to 27 pigs per pen; 6 pens per treatment] in group 2) 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).