Table 2.
Ingredient and nutrient composition of diets fed to steers in the digestibility experiment
| Item | Treatment1 | |||
|---|---|---|---|---|
| 10 | 12 | 14 | 16 | |
| Ingredients, % DM | ||||
| MDGS2 | 30.0 | 30.0 | 30.0 | 30.0 |
| Dry-rolled wheat | 36.7 | 34.7 | 32.7 | 30.7 |
| Corn silage | 20.0 | 20.0 | 20.0 | 20.0 |
| Dry-rolled corn | 10.0 | 10.0 | 10.0 | 10.0 |
| Wheat straw | 0.0 | 2.0 | 4.0 | 6.0 |
| Limestone | 0.8 | 0.8 | 0.8 | 0.8 |
| Supplement3 | 2.5 | 2.5 | 2.5 | 2.5 |
| Nutrient composition (DM Basis) | ||||
| Dry matter, % | 64.5 | 64.7 | 64.3 | 64.4 |
| Crude protein, % | 16.0 | 15.7 | 16.3 | 16.2 |
| NEg4, Mcal/kg | 1.38 | 1.36 | 1.33 | 1.31 |
| NDF, % | 41.1 | 42.3 | 43.1 | 41.8 |
| ADF, % | 14.6 | 14.8 | 18.9 | 16.6 |
Treatment: 10 = 10% roughage included as corn silage assuming 50:50 of roughage to concentrate in corn silage, 12 = 10% roughage from corn silage and 2% straw, 14 = 10% roughage from corn silage and 4% straw, and 16 = 10% roughage from corn silage and 6% straw.
Modified distillers grains with solubles.
The supplement contained a minimum of 10% CP, 1.5% crude fat, 17.5% Ca, 0.1% P, 6.5% salt, 1.1% Mg, 0.1% K, 400 mg/kg Cu, 1,400 mg/kg Zn, 176,400 IU/kg vitamin A, 44,100 IU/kg of vitamin D, 727 IU/kg vitamin E, and contained 1,102 g/metric ton monensin (BP Balancer 10 RM1000, Purina Animal Nutrition, Arden Hills, MN). Inclusion of supplement was based on 0.25kg steer−1·d−1 assuming a 10 kg dry matter intake.
Net Energy values estimated based on NASEM (2016).