Table 4.
Effects of added dietary Cu, Zn, EO, and CTC on nursery pig growth performance (exp. 2)a,b
| Added Cuc: | − | + | − | − | + | + | − | + | − | − | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Added Znd: | − | − | + | − | + | − | + | + | − | − | |
| EOe: | − | − | − | + | − | + | + | + | − | − | |
| CTC, ppm: | 0 | − | − | − | − | − | − | − | 55 | 441 | SEM |
| BW, kg | |||||||||||
| d 5 | 6.57 | 6.56 | 6.56 | 6.53 | 6.61 | 6.69 | 6.56 | 6.62 | 6.53 | 6.55 | 0.084 |
| d 33 | 18.94 | 19.61 | 19.82 | 19.08 | 20.47 | 19.91 | 19.85 | 19.96 | 18.88 | 19.64 | 0.361 |
| d 47 | 29.02 | 29.32 | 29.68 | 28.83 | 30.56 | 29.50 | 29.47 | 29.89 | 28.90 | 29.28 | 0.503 |
| d 5 to 33 | |||||||||||
| ADG, kg | 0.44 | 0.46 | 0.47 | 0.42 | 0.49 | 0.47 | 0.47 | 0.48 | 0.43 | 0.46 | 0.012 |
| ADFI, kg | 0.56 | 0.58 | 0.61 | 0.55 | 0.61 | 0.62 | 0.61 | 0.62 | 0.55 | 0.59 | 0.018 |
| G:F | 0.77 | 0.79 | 0.77 | 0.76 | 0.81 | 0.76 | 0.78 | 0.76 | 0.79 | 0.78 | 0.012 |
| ME caloric efficiencyf | 4,262 | 4,163 | 4,253 | 4,338 | 4,049 | 4,304 | 4,196 | 4,293 | 4,165 | 4,193 | 65.2 |
| NE caloric efficiencyf | 3,145 | 3,071 | 3,137 | 3,200 | 2,986 | 3,175 | 3,095 | 3,166 | 3,073 | 3,092 | 48.1 |
| d 33 to 47 | |||||||||||
| ADG, kg | 0.72 | 0.69 | 0.70 | 0.70 | 0.72 | 0.68 | 0.69 | 0.71 | 0.72 | 0.69 | 0.016 |
| ADFI, kg | 1.17 | 1.13 | 1.15 | 1.13 | 1.16 | 1.12 | 1.13 | 1.14 | 1.12 | 1.12 | 0.028 |
| G:F | 0.62 | 0.62 | 0.61 | 0.62 | 0.62 | 0.61 | 0.61 | 0.62 | 0.64 | 0.61 | 0.113 |
| d 5 to 47 | |||||||||||
| ADG, kg | 0.53 | 0.54 | 0.55 | 0.51 | 0.57 | 0.54 | 0.55 | 0.55 | 0.53 | 0.54 | 0.011 |
| ADFI, kg | 0.76 | 0.76 | 0.79 | 0.73 | 0.79 | 0.79 | 0.78 | 0.79 | 0.74 | 0.77 | 0.019 |
| G:F | 0.70 | 0.71 | 0.69 | 0.69 | 0.72 | 0.69 | 0.70 | 0.70 | 0.72 | 0.70 | 0.009 |
| ME caloric efficiencyf | 4,726 | 4,652 | 4,721 | 4,754 | 4,553 | 4,752 | 4,704 | 4,702 | 4,590 | 4,666 | 61.5 |
| NE caloric efficiencyf | 3,483 | 3,429 | 3,479 | 3,504 | 3,355 | 3,502 | 3,467 | 3,465 | 3,383 | 3,439 | 45.3 |
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.
cCu from CuSO4 was added to treatment diets at either 0 or 125 ppm.
dPharmacological Zn diet treatments had an addition of 3,000 ppm Zn from added ZnO from d 5 to 12 and an addition of 2,000 ppm Zn from added ZnO from d 12 to 33.
eRegano EX (Ralco Animal Nutrition, Marshall, MN) was added to treatment diets at either 0 or 0.1%.
fCaloric efficiency is expressed as kcal per kg of live weight gain.