Table 5.

Probability (P <) for effects of added Cu, Zn, EO, and CTC on nursery pig growth performance (exp. 2)^a,b

	Probability, P <
	Cu	Zn	EO	Cu × Zn	Cu × EO	Zn × EO	Cu × Zn × EO	CTC
								Linear	Quadratic
BW, kg
d 5	0.250	0.976	0.685	0.830	0.442	0.710	0.519	1.000	0.723
d 33	0.022	0.009	0.965	0.437	0.689	0.331	0.463	0.074	0.739
d 47	0.099	0.034	0.514	0.796	0.945	0.516	0.544	0.590	0.808
d 5 to 33
ADG, g	0.003	<0.001	0.605	0.120	0.822	0.707	0.098	0.028	0.755
ADFI, g	0.055	0.006	0.444	0.173	0.182	0.798	0.444	0.079	0.392
G:F	0.150	0.186	0.009	0.958	0.024	0.886	0.137	0.833	0.265
ME caloric efficiencyc	0.138	0.089	0.015	0.870	0.025	0.858	0.144	0.645	0.226
NE caloric efficiencyc	0.137	0.084	0.015	0.870	0.025	0.858	0.144	0.631	0.226
d 33 to 47
ADG, g	0.928	0.608	0.136	0.095	0.692	0.965	0.782	0.101	0.987
ADFI, g	0.675	0.696	0.355	0.347	0.668	0.978	0.675	0.377	0.222
G:F	0.659	0.972	0.488	0.321	0.930	0.958	0.845	0.340	0.135
d 5 to 47
ADG, g	0.018	0.001	0.207	0.573	0.621	0.825	0.111	0.422	0.771
ADFI, g	0.225	0.025	0.818	0.425	0.225	0.942	0.304	0.499	0.240
G:F	0.141	0.293	0.086	0.549	0.145	0.972	0.549	0.973	0.093
ME caloric efficiencyc	0.131	0.207	0.111	0.560	0.147	0.976	0.561	0.937	0.084
NE caloric efficiencyc	0.131	0.202	0.111	0.560	0.147	0.977	0.560	0.930	0.084

^aA total of 350 nursery pigs (PIC 1050; initially 6.05 kg BW) were used in a 47-d study with 5 pigs per pen and 7 replicate pens per treatment except for 4 treatments (EO, Cu + Zn, Cu + EO, Cu + Zn + EO), which had 6 replicate pens each.

^bExperimental treatment diets were fed from d 5 to d 33. All diets contained 16.5 ppm Cu and 110 ppm of Zn from the trace mineral premix.

^cCaloric efficiency is expressed as kcal per kg of live weight gain.