Table 6.
Colostrum and milk composition by treatment (as-is basis)
| Control | DDGS | P-value | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Item | ZnSO4 | PSZn | ZnSO4 | PSZn | LowZn | SE | Diet | Zn source | Diet * Zn source |
| Colostrum1 | |||||||||
| Moisture, % | 77.3 | 75.3 | 77.0 | 77.8 | — | 1.0 | 0.25 | 0.53 | 0.13 |
| Crude protein, % | 14.1 | 15.0 | 12.0 | 14.1 | — | 1.1 | 0.19 | 0.18 | 0.59 |
| Crude fat, % | 4.3 | 5.8 | 6.3 | 3.7 | — | 1.0 | 0.99 | 0.55 | 0.04 |
| Zn, mg/kg | 12.2 | 13.7 | 13.0 | 14.8 | — | 1.3 | 0.47 | 0.23 | 0.90 |
| Milk | |||||||||
| Lactation2 | |||||||||
| Moisture, % | 79.1 | 79.9 | 79.9 | 79.8 | — | 0.9 | 0.66 | 0.70 | 0.57 |
| Crude protein, % | 5.3 | 5.7 | 5.0 | 5.3 | — | 1.0 | 0.14 | 0.13 | 0.81 |
| Crude fat, % | 9.7 | 8.6 | 9.5 | 9.1 | — | 1.1 | 0.90 | 0.47 | 0.77 |
| Zn, mg/kg | 5.2 | 5.7 | 5.0 | 5.4 | — | 0.4 | 0.48 | 0.33 | 0.88 |
| LowZn Balance3 | |||||||||
| Moisture, % | — | — | — | — | 80.5 | 0.9 | — | — | — |
| Crude protein, % | — | — | — | — | 4.9 | 0.1 | — | — | — |
| Crude fat, % | — | — | — | — | 8.9 | 1.1 | — | — | — |
| Zn, mg/kg | — | — | — | — | 4.3 | 0.2 | — | — | — |
1Samples collected within 12 h after parturition.
2Samples collected on day 10 of lactation.
3Samples collected on day 17 of lactation.