Table 4.
Effects of different forms of zinc oxide on the nutrient digestibility of weaned piglets (n = 20).
| Zn, Status, and Level | CON | ZnO | Chelate -ZnO |
Nano -ZnO |
SE | p-Value |
|---|---|---|---|---|---|---|
| Items | 0 | 2500 | 200 | 200 | trt | |
| One week intake | ||||||
| Feed intake, g | 232.5 | 242.5 | 250.0 | 250.0 | 9.5 | 0.557 |
| Dry matter, g | 211.8 | 220.4 | 225.5 | 228.0 | 8.6 | 0.611 |
| Crude protein, g | 48.3 | 50.3 | 52.3 | 52.1 | 2.0 | 0.487 |
| Energy, kcal | 914.2 | 971.9 | 1016.4 | 989.0 | 36.9 | 0.309 |
| Excretion | ||||||
| Fresh fecal | 220.0 | 207.5 | 210.0 | 213.3 | 10.6 | 0.852 |
| Dry matter, g | 34.2 | 30.3 | 32.6 | 30.8 | 1.3 | 0.225 |
| Crude protein, g | 9.5 | 9.0 | 9.4 | 9.4 | 0.5 | 0.919 |
| Energy, kcal | 184.7 | 161.1 | 176.6 | 163.4 | 9.8 | 0.349 |
| One week ATTD, % | ||||||
| Dry matter x | 83.8 b | 86.2 a | 85.5 a | 86.5 a | 0.5 | 0.014 |
| Crude protein | 80.3 | 82.0 | 82.1 | 81.9 | 0.8 | 0.333 |
| Gross energy x | 79.8 b | 83.4 a | 82.6 a | 83.5 a | 0.7 | 0.013 |
| Two weeks intake | ||||||
| Feed intake, g | 300.0 | 300.0 | 300.0 | 300.0 | 0.0 | 1.000 |
| Dry matter, g | 273.3 | 272.7 | 270.6 | 273.6 | 0.2 | 0.977 |
| Crude protein, g | 62.3 | 62.3 | 62.3 | 62.3 | 0.1 | 0.995 |
| Energy, kcal | 1177.5 | 1203.3 | 1223.1 | 1186.8 | 7.6 | 0.632 |
| Excretion | ||||||
| Fresh fecal, g | 266.5 | 282.5 | 263.8 | 258.3 | 8.0 | 0.254 |
| Dry matter, g | 42.8 | 40.2 | 42.2 | 41.0 | 1.1 | 0.361 |
| Crude protein, g | 12.6 | 11.2 | 12.3 | 11.5 | 0.4 | 0.096 |
| Energy, kcal y | 237.5 ab | 209.1 b | 247.1 a | 219.5 ab | 8.4 | 0.035 |
| Two week ATTD, % | ||||||
| Dry matter | 84.3 | 85.3 | 84.4 | 85.0 | 0.4 | 0.337 |
| Crude protein | 79.7 | 82.1 | 80.3 | 81.6 | 0.7 | 0.113 |
| Gross energy y | 79.8 b | 82.6 a | 79.8 b | 81.5 ab | 0.7 | 0.032 |
Abbreviation: CON, no additional added zinc oxide in diet (negative control); ZnO, CON + 2500 ppm zinc oxide (positive control); chelate-ZnO, CON + zinc chelate; nano-ZnO, CON + nanoparticle size of zinc; SE, standard error; DE, digestible energy; DM, dry matter; CP, crude protein. a,b Means within a row with different letters are significantly different at p < 0.05. x contrast: CON vs. other treatments (p < 0.05). y contrast: ZnO vs. chelate- ZnO (p < 0.05).