Table 5.
Effects of different forms of zinc oxide on apparent total tract and ileum digestibility in 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 | ||||||
| Feed intake, g | 232.5 | 242.5 | 250.0 | 250.0 | 9.5 | 0.557 |
| Zinc intake, mg x,y,z | 23.3 c | 524.6 a | 89.0 b | 87.3 b | 8.0 | 0.001 |
| Zinc excretion, mg x,y,z,w | 21.3 d | 461.6 a | 36.8 c | 69.5 b | 4.3 | 0.001 |
| ATTD of Zinc, % x,y,z,w | 8.3 c | 11.9 c | 58.4 a | 20.4 b | 2.6 | 0.001 |
| Two week | ||||||
| Feed intake, g | 300.0 | 300.0 | 300.0 | 300.0 | 1.7 | 1.000 |
| Zinc intake, mg x,y,z | 30.0 c | 663.58 a | 106.8 b | 107.6 b | 2.8 | 0.001 |
| Zinc excretion, mg x,y,z,w | 28.1 d | 612.1 a | 55.2 c | 76.8 b | 6.1 | 0.001 |
| ATTD of Zinc, % x,y,z,w | 6.4 c | 7.8 c | 48.4 a | 28.7 b | 1.9 | 0.001 |
| AID of Zinc, % x,y,z,w | 5.0 c | 5.3 c | 39.2 a | 23.0 b | 0.6 | 0.001 |
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; ATTD, apparent total tract digestibility; AID, apparent ileum digestibility. a,b,c,d 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). z contrast: ZnO vs. nano- ZnO (p < 0.05). w contrast: chelate-ZnO vs. nano-ZnO (p < 0.05).