The Absorption of
Copper and Zinc by Cattle Consuming Diets
Containing the Antagonists Molybdenum, Sulfur, and Iron
Table 4. Estimated intakes of dry matter, copper, zinc and molybdenum fed to weaned heifer calves fed complexed-Cu, complexed-Zn or Cu and Zn sulfate.
| No Added Zinc | Zinc Addition | ||||
| Ingredient |
No Cu |
Added Cu |
No Cu |
Added Cu |
Inorganic |
| Intake/day | |||||
| DM, lbs | 15 | 15 | 15 | 15 | 15 |
| Copper, mg/d | 75 (11)a | 143 (21) | 75 | 143 | 143 |
| Molybdenum,mg/d | 41 | 41 | 41 | 41 | 41 |
| Cu/Mo ratio | 1.8 | 3.5 | 1.8 | 3.5 | 3.5 |
| Zinc, mg/d | 204 (30) | 204 | 612 (90) | 612 | 612 |
a Values in parenthesis are expressed as ppm in the diet.