Table 1.
Effect of environmental variables on LSMeans water intake as a percent of mid-test body weight for cattle fed in different groups, seasons, and under different bunk management protocols
| Groupa | Season | Baseline | +Solar Radiation, MJ/m2 | +Temperature, oC | +Humidity, % | +Wind speed, km/h |
|---|---|---|---|---|---|---|
| 1 | Summer | 10.72b | 10.30b | 9.74b | 9.85b | 9.84b |
| 2 | Winter | 6.90c | 7.69c | 8.74c | 8.58c | 8.60c |
| 3 | Summer | 8.63d | 8.28d | 7.84d | 8.00d | 8.00d |
| 4 | Summer | 10.80b | 10.25b | 9.44e | 9.54e | 9.51e |
| 5 | Winter | 8.44e | 8.85e | 9.47e | 9.26f | 9.28f |
| SP vs. WP | 2.34*** | 1.34*** | −0.09 | 0.21* | 0.18* | |
| Slk vs. AL | −0.87*** | −0.79*** | −0.68*** | −0.59*** | −0.58*** | |
| SP Slk vs. AL | −1.13*** | −0.96*** | −0.65*** | −0.61*** | −0.59*** | |
| WP Slk vs. AL | −0.77*** | −0.58*** | −0.37*** | −0.34*** | −0.34*** |
The baseline model with no environmental variables included was augmented with each additional weather variable in the table until all 4 variables were fitted in the model.
aSP includes intakes collected during the summer, WP includes intakes collected during the winter, Slk are groups under slick bunk management, and AL are groups with ab libtium access to feed.
b–fDifferences in superscripts within each column indicate significant differences between groups (P < 0.05).
*Significant difference between contrasts for each analysis (0.0001***, 0.01**, and 0.05*).