From: Effect of induced ruminal acidosis on blood variables in heifers
Treatment1 | Period2 | P-value | SEM | |||||||
---|---|---|---|---|---|---|---|---|---|---|
Trait | CT | MS | HS | 1 | 2 | 3 | T | P | T x P | |
DMI, kg/d | 7.7a | 6.9a | 5.1b | 6.2 | 6.6 | 6.9 | 0.002 | 0.426 | 0.571 | 0.39 |
Nadir ruminal pH | 5.69a | 5.47ab | 5.44b | 5.23b | 5.75a | 5.62a | 0.042 | 0.003 | 0.307 | 0.073 |
Mean ruminal pH | 6.50a | 6.34b | 6.31b | 6.15b | 6.48a | 6.52a | 0.012 | 0.001 | 0.116 | 0.076 |
Max ruminal pH | 7.13 | 7.09 | 7.08 | 6.97b | 7.08ab | 7.25a | 0.423 | 0.001 | 0.054 | 0.090 |
Blood count and gas | ||||||||||
HGB, g/dL | 11.1ab | 10.9b | 11.4a | 11.7a | 10.8b | 10.9b | 0.010 | 0.001 | 0.526 | 0.23 |
HCT, % | 33.8ab | 32.8b | 34.1a | 35.4a | 32.3b | 33.0b | 0.027 | <0.001 | 0.563 | 0.60 |
PLT, K/μL | 506b | 481b | 601a | 493 | 564 | 530 | 0.008 | 0.177 | 0.043 | 78.4 |
MPV, fl | 4.2 | 4.1 | 3.9 | 4.0 | 4.2 | 4.0 | 0.542 | 0.840 | 0.266 | 0.26 |
pCO2, mmHg | 52.0 | 50.3 | 50.4 | 50.4 | 50.9 | 51.4 | 0.126 | 0.502 | 0.137 | 0.63 |
pO2, mmHg | 61.7 | 72.3 | 71.1 | 42.1b | 71.4ab | 91.6a | 0.450 | 0.003 | 0.454 | 7.10 |
HCO3-, mmol/L | 31.8α | 31.3αβ | 30.6β | 31.8 | 31.3 | 30.7 | 0.071 | 0.127 | 0.081 | 0.45 |
O2Hb, % | 87.6 | 87.9 | 86.3 | 77.5b | 89.9a | 94.5a | 0.728 | <0.001 | 0.683 | 2.01 |
RHb, % | 9.9 | 9.8 | 12.4 | 20.4a | 8.6b | 3.1b | 0.381 | <0.001 | 0.721 | 1.96 |
sO2m, % | 89.9 | 90.3 | 87.5 | 79.2b | 91.4a | 97.0a | 0.393 | <0.001 | 0.715 | 2.12 |
Haematological profile and acute phase proteins | ||||||||||
Glucose, mmol/L | 4.34 | 4.37 | 4.32 | 4.42α | 4.26β | 4.35αβ | 0.686 | 0.098 | 0.891 | 0.104 |
CHOL, mmol/L | 3.52 | 3.37 | 3.45 | 3.27b | 3.28b | 3.79a | 0.446 | 0.005 | 0.548 | 0.130 |
NEFA, meq/L | 0.23 | 0.20 | 0.27 | 0.24 | 0.21 | 0.25 | 0.155 | 0.624 | 0.555 | 0.025 |
β-HB, mmol/L | 0.28 | 0.31 | 0.29 | 0.26 β | 0.30αβ | 0.31 α | 0.440 | 0.069 | 0.406 | 0.016 |
AST, U/L | 78.2ab | 72.1b | 82.0a | 76.1αβ | 74.4β | 81.7α | 0.007 | 0.053 | 0.092 | 1.70 |
γGT, U/L | 19.2 | 19.4 | 18.6 | 17.7b | 19.2ab | 20.4a | 0.527 | 0.031 | 0.622 | 1.33 |
LBP, μg/ml | 5.9b | 9.5a | 10.5a | 10.5a | 7.4b | 7.9b | <0.001 | 0.014 | 0.221 | 0.92 |