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Mean copper and zinc contents of the different feed components (mg/kg DM).
| Cu | Zn | |
|---|---|---|
| Grass silage (n = 10) | 8.2 ± 1.4 | 34.0 ± 5.9 |
| Maize silage (n = 10) | 4.8 ± 0.5 | 23.7 ± 2.6 |
| Concentrate A (n = 9) | 18.2 ± 0.5 | 105.5 ± 2.9 |
| Concentrate B (n = 9) | 47.3 ± 1.4 | 243.3 ± 7.1 |
| Total ration A (n = 9) | 11.1 ± 1.6 | 61.9 ± 17.0 |
| Total ration B (n = 9) | 22.6 ± 4.9 | 113.0 ± 30.0 |
