Table 1.
Ingredients and chemical composition of diets fed to beef heifers during the experiment1
| Item2 | CTL− | CTL+ | OBE-L | OBE-H |
|---|---|---|---|---|
| Diet ingredient, % DM basis | ||||
| Corn gluten feed | 61.0 | 61.0 | 61.0 | 61.0 |
| Cottonseed hulls | 32.0 | 32.0 | 32.0 | 32.0 |
| Molasses | 4.0 | 4.0 | 4.0 | 4.0 |
| Premix3 | 3.00 | 3.00 | 2.96 | 2.84 |
| OBE4 | 0.00 | 0.00 | 0.04 | 0.16 |
| Chemical composition | ||||
| DM | 94.3 | 93.9 | 94.0 | 93.6 |
| CP | 16.7 | 16.8 | 17.0 | 16.9 |
| ADF | 31.1 | 30.8 | 26.7 | 30.0 |
| NDF | 51.8 | 51.1 | 49.3 | 50.0 |
| Crude fat | 3.6 | 3.5 | 3.6 | 3.7 |
| TDN | 69.5 | 70.0 | 70.0 | 70.0 |
| NEm, Mcal/kg5 | 1.4 | 1.4 | 1.4 | 1.4 |
| NEg, Mcal/kg5 | 0.8 | 0.8 | 0.8 | 0.8 |
| Ca | 1.3 | 1.3 | 1.5 | 1.2 |
| P | 0.8 | 0.8 | 0.8 | 0.8 |
1CTL− = control diet + saline injections; CTL+ = control diet + LPS injections; OBE-L = control diet + olive oil bioactive extract at 0.04% of the diet + LPS injection; OBE-H = control diet + olive oil bioactive extract at 0.16% of the diet + LPS injection.
2Values other than DM are expressed as a percentage of dietary DM.
3Premix comprised calcium carbonate and was formulated to deliver 0 (CTL− and CTL+), 0.04 (OBE-L), or 0.16% (OBE-H) of OBE in the diet DM.
4OBE = olive oil bioactive extract.
5NEm and NEg were calculated with NASEM (2016).