Table 4.
Effects of Zn-Met and ZnO on the serum and tissue micronutrient concentrations of Holstein dairy calves.
| Item | Treatment 1 | SEM | p Value | ||
|---|---|---|---|---|---|
| Control | Zn-Met | ZnO | |||
| Serum micronutrient concentration (mg/kg) | |||||
| Zinc | 2.06 b | 3.34 a | 2.82 ab | 0.32 | 0.037 |
| Iron | 4.26 | 4.92 | 4.48 | 0.62 | 0.744 |
| Copper | 0.77 | 0.87 | 1.22 | 0.14 | 0.090 |
| Hepatic micronutrient concentration (mg/kg) 2 | |||||
| Zinc | 75.5 b | 122a | 117 ab | 11.7 | 0.025 |
| Iron | 34.5 | 35.4 | 35.4 | 3.83 | 0.982 |
| Copper | 83.5 | 84.9 | 83.5 | 10.2 | 0.994 |
a,b Mean values in the same row with different superscripts are significantly different (p < 0.05). 1 Treatment: CON (control), fed only milk and starter diet; Zn-Met group, fed milk and starter diet containing 455 mg Zn-Met (equivalent to 80 mg zinc); ZnO group, fed milk and starter diet containing 103 mg zinc oxide (equivalent to 80 mg zinc). 2 The results are fresh weight basis.