Table 1.
Actual diet formulation fed and nutrient composition from weekly ingredient analysesa
| Days fed | |||||||
|---|---|---|---|---|---|---|---|
| Item | 1–7 | 8–14 | 15–21 | 22–56 | 57–74 | 75–116 | 117–140 |
| Dry-rolled corn, % | 39.00 | 48.75 | 64.23 | 64.94 | 64.20 | 68.87 | 69.33 |
| Modified distillers grains plus solubles, % | 20.01 | 20.82 | 14.19 | 16.57 | 18.26 | 17.42 | 17.27 |
| Alfalfa-grass hay blend, % | 29.49 | 17.54 | 5.03 | – | – | – | – |
| Millet hay, % | – | – | – | 2.92 | 3.05 | 7.90 | – |
| Corn silage, % | 4.74 | 5.69 | 10.27 | 9.30 | 8.56 | – | – |
| Grass hay, % | – | – | – | – | – | – | 7.58 |
| Liquid supplementb, % | 3.90 | 4.11 | 4.03 | 4.02 | 3.96 | 3.88 | 3.88 |
| Pelleted treatment supplementc, % | 2.86 | 3.09 | 2.25 | 2.25 | 1.97 | 1.93 | 1.94 |
| Diet DM, % | 68.46 | 66.28 | 65.48 | 64.62 | 65.62 | 76.51 | 76.46 |
| Crude protein, % | 13.73 | 13.33 | 11.29 | 12.17 | 12.11 | 12.83 | 12.51 |
| NDF, % | 34.92 | 28.83 | 19.95 | 18.79 | 18.15 | 18.77 | 17.96 |
| ADF, % | 19.79 | 15.62 | 10.24 | 9.88 | 9.22 | 9.53 | 9.46 |
| Ash, % | 7.18 | 6.43 | 4.90 | 5.27 | 5.55 | 5.58 | 5.36 |
| Ether extract, % | 3.31 | 3.51 | 3.60 | 4.47 | 4.79 | 4.42 | 4.28 |
| NE for maintenance, Mcal/kg | 1.87 | 1.97 | 2.05 | 2.07 | 2.08 | 2.07 | 2.09 |
| NE for gain, Mcal/kg | 1.19 | 1.29 | 1.39 | 1.40 | 1.41 | 1.40 | 1.41 |
aAll values except diet DM on a DM basis.
bThe liquid supplement contained (all values except for DM on a DM basis): 69.05% DM, 25.76% crude protein, 22.42% nonprotein nitrogen, 0.88 Mcal/kg of NE for maintenance, 0.64 Mcal/kg of NE for gain, 59.60% ash, 17.00% calcium, 0.24% phosphorus, 1.26% potassium, 0.07% magnesium, 7.24% NaCl, 0.27% sulfur, 2.66 ppm cobalt, 466.63 ppm inorganic copper, 40.14 ppm iodine, 10.49 mg/kg EDDI, 57.14 ppm iron, 832.71 ppm manganese, 4.05 ppm selenium, 2,498.14 ppm inorganic zinc, 11,078.69 ppb chromium propionate, 478.28 ppm organic copper complex, 1,560.86 organic zinc complex, 31,038.38 IU/kg vitamin A, 170.79 IU/kg vitamin E, and 805.95 g/Mg monensin sodium.
cPelleted treatment supplement consisted of exclusively soybean hulls for control (CON) steers and soybean hulls plus CLOSTAT 500 (CLO; Kemin Industries, Des Moines, IA) at 2,080 g/Mg sufficient to provide 0.5 g/steer/d for CLO steers.