Table 5.
Effects of different concentrations of coated nano ZnO materials on the growth performance and diarrhea rate in growing pigs (Exp. 2)
| Diets1 | ||||
|---|---|---|---|---|
| Item | HZN | LNZO | HNZO | P-value |
| BW, kg | ||||
| Day 1 | 17.05 ± 0.49 | 17.04 ± 0.62 | 17.04 ± 0.45 | 1 |
| Day 14 | 21.13 ± 0.25 | 22.53 ± 0.78 | 22.81 ± 0.50 | 0.133 |
| Day 28 | 25.23 ± 0.89a | 28.86 ± 0.97b | 28.09 ± 0.45b | 0.015 |
| Days 1 to 14 | ||||
| ADG, g | 338.46 ± 29.75a | 437.18 ± 17.40b | 429.49 ± 20.47b | 0.001 |
| ADFI, kg | 1.04 ± 0.000 | 1.04 ± 0.000 | 1.04 ± 0.000 | 1 |
| F/G ratio | 3.11 ± 0.001b | 2.38 ± 0.001a | 2.44 ± 0.001a | 0.001 |
| Diarrhea rate, % | 5.95 ± 1.94a | 29.93 ± 2.65b | 23.43 ± 1.89b | <0.01 |
| Days 14 to 28 | ||||
| ADG, g | 497.22 ± 73.12 | 581.94 ± 73.90 | 439.28 ± 38.52 | 0.132 |
| ADFI, kg | 1.24 ± 0.06b | 1.19 ± 0.02ab | 1.13 ± 0.01a | 0.037 |
| F/G ratio | 2.54 ± 0.74 | 2.13 ± 0.52 | 2.69 ± 0.22 | 0.192 |
| Diarrhea rate, % | 11.90 ± 0.74a | 53.06 ± 3.24b | 52.03 ± 2.99b | <0.01 |
| Days 1 to 28 | ||||
| ADG, g | 354.40 ± 40.77a | 472.57 ± 31.29b | 441.71 ± 14.99b | 0.032 |
| ADFI, kg | 1.08 ± 0.03 | 1.11 ± 0.01 | 1.08 ± 0.009 | 0.589 |
| F/G ratio | 3.18 ± 0.45b | 2.40 ± 0.15a | 2.45 ± 0.08a | 0.022 |
| Diarrhea rate, % | 8.89 ± 0.98a | 41.50 ± 2.56b | 37.73 ± 3.33b | <0.01 |
Data are expressed as means ± SEM (n = 7). Means within a row with different superscripts are significantly different (P < 0.05).
1HZN = basal diet containing Zn-free premix + 2250 mg Zn/kg from ZnO; LNZO = basal diet containing Zn-free premix + 100 mg Zn/kg from 5% coated NZO material; HNZO = basal diet containing Zn-free premix + 100 mg Zn/kg from 10% coated NZO material.