Table 3 Oxygen concentration in the coccygeal vein, coccygeal artery, and mammary vein of dairy cows under different heat stress
From: Heat stress affects dairy cow health status through blood oxygen availability
Item, mL/dL | Heat stress | SEM | P-value | ||||
|---|---|---|---|---|---|---|---|
No | Mild | Moderate | Treat | Linear | Quadratic | ||
Coccygeal vein | 7.54 | 7.77 | 7.19 | 0.41 | 0.60 | 0.54 | 0.42 |
Coccygeal artery | 11.6a | 11.2ab | 10.8b | 0.20 |  < 0.01 |  < 0.01 | 0.81 |
Mammary vein | 9.58a | 9.00ab | 8.69b | 0.28 |  < 0.01 |  < 0.01 | 0.51 |
Mammary AVD1 | 2.09 | 2.26 | 2.21 | 0.20 | 0.77 | 0.62 | 0.61 |