Table 9.
Blood metabolite and immunoglobulin concentrations in finishing cattle fed diets containing 15% DDGS (DM basis) and different amounts (0%, 4%, 8%, and 12%; DM basis) of barley silage1
Barley silage, % of dietary DM | P-value2 | |||||||
---|---|---|---|---|---|---|---|---|
Item | 0 | 4 | 8 | 12 | SEM | Silage | Linear | Quadratic |
Plasma osmolality, mOsm/kg | 300 | 299 | 302 | 298 | 5.2 | 0.89 | 0.74 | 0.49 |
Serum, mmol/L | ||||||||
BHBA | 0.256 | 0.341 | 0.320 | 0.346 | 0.0339 | 0.097 | 0.13 | 0.050 |
Glucose | 4.49 | 4.34 | 4.28 | 4.29 | 0.260 | 0.38 | 0.18 | 0.47 |
NEFA | 0.086 | 0.088 | 0.089 | 0.100 | 0.0072 | 0.19 | 0.88 | 0.20 |
Serum, g/L | ||||||||
IgG | 23.0 | 22.4 | 24.3 | 23.7 | 1.48 | 0.64 | 0.61 | 0.57 |
IgM | 1.65 | 1.71 | 1.96 | 1.86 | 0.218 | 0.59 | 0.33 | 0.92 |
IgA | <0.5 | <0.5 | <0.5 | <0.5 | — | — | — | — |
1Blood was sampled on day 17 of each period at 0, 3, 6, 12, and 18 h postfeeding. Means are averaged over sampling times.
2 P-values indicate overall silage, linear, and quadratic effects.