Table 1.
Compositional analysis of non-zinc supplemented diet
| Ingredient, % of diet DM | Transition 1 days 0 to 6 |
Transition 2 days 7 to 13 |
Finisher days 14 to 59 |
|---|---|---|---|
| Dry rolled corn | 30 | 45 | 57 |
| Sweet Bran1 | 25 | 20 | 20 |
| DDGS2 | 18.06 | 13.06 | 13.06 |
| Bromegrass hay | 5 | 8 | 8 |
| Corn silage | 20 | 12 | - |
| Limestone | 1.5 | 1.5 | 1.5 |
| Salt | 0.31 | 0.31 | 0.31 |
| Vitamin & mineral premix3 | 0.1159 | 0.1159 | 0.1159 |
| Rumensin | 0.0135 | 0.0135 | 0.0135 |
| Analyzed composition, % | |||
| Crude protein4 | 16.6 | 13.1 | 13.9 |
| NDF4 | 28.0 | 31.2 | 20.9 |
| Ether extract4 | 5.5 | 5.0 | 4.4 |
| Zn5, mg/kg DM | 48 | 40 | 42 |
| Cu5, mg/kg DM | 17 | 13 | 12 |
| Calculated composition6, Mcal/kg | |||
| NEm | 1.97 | 1.98 | 2.05 |
| NEg | 1.32 | 1.33 | 1.39 |
1Branded wet corn gluten feed (Cargill Corn Milling, Blair, NE).
2Dried distillers grains with solubles.
3Premix provided 2,200 IU vitamin A and 25 IU vitamin E/kg diet. All diets included NASEM (2016) recommendations for Co, Cu, I, Mn, and Se. Diets were supplemented with Zn at 0, 30, 100, or 150 mg Zn/kg DM. All trace minerals were from inorganic sources.
4Analysis of Zn0 TMR was conducted by Dairyland Laboratories (Arcadia, WI).
5Trace minerals were analyzed by inductively coupled plasma optical emission spectrometry (ICP Optima 7000 DV, Perkin Elmer, Waltham, MA). Analyses were of Zn0 TMR. Analysis of Zn30, Zn100, and Zn150 were 68, 122, and 148 mg Zn/kg DM, 77, 121, and 107 mg Zn/kg DM, and 48, 101, and 137 mg Zn/kg DM for transition 1, transition 2, and finishing diets, respectively.
6Net energy of maintenance (NEm) and gain (NEg) were calculated using ingredient nutrient values from NASEM (2016).