Table 5.
Ruminal VFA and ammonia-nitrogen (NH3-N) concentrations for a subset of steers (n = 4) fed a corn-based finishing diet without (control) or supplemented with low, medium, and high doses of 3-NOP
| Treatment1 | P-value | |||||
|---|---|---|---|---|---|---|
| Item | Control | Low | Medium | High | SEM | 3-NOP |
| Total VFA, mM | 133.0 | 144.1 | 104.8 | 139.7 | 9.79 | 0.06 |
| VFA, mol/100 mol | ||||||
| Acetate (Ac) | 47.11a | 39.99b | 42.24b | 41.28b | 0.850 | <0.001 |
| Propionate (Pr) | 36.57 | 45.11 | 46.16 | 40.84 | 2.803 | 0.06 |
| Butyrate | 10.46 | 8.91 | 5.89 | 11.48 | 2.140 | 0.12 |
| Valerate | 2.45 | 3.01 | 2.31 | 2.75 | 0.391 | 0.61 |
| Isobutyrate | 1.01b | 1.02b | 1.38a | 1.55a | 0.131 | 0.001 |
| Isovalerate | 2.08 | 1.53 | 1.83 | 1.79 | 0.375 | 0.29 |
| Caproate | 0.32 | 0.42 | 0.19 | 0.31 | 0.072 | 0.21 |
| Ac:Pr ratio | 1.31a | 0.90b | 0.92b | 1.06a | 0.100 | 0.05 |
| NH3-N, mM | 7.49 | 6.15 | 3.34 | 6.04 | 1.795 | 0.12 |
1The measured 3-NOP concentration was 0, 85.6, 107.6, and 124.5 mg/kg dietary DM consumed for the control, low, medium, and high treatment, respectively.
a,bValues within a row with different letters differ at P ≤ 0.05.