Table 3.
Grazing behavior for 2-yr-old cows differing in feed efficiency1
| Date | Day of study | n | Daily traveled distance, km/d | SEM | P-value |
|---|---|---|---|---|---|
| Distance traveled by day | |||||
| 19-Nov-2015 | 2 | 10 | 4.21l | 0.422 | <0.0001 |
| 20-Nov-2015 | 3 | 10 | 4.89kl | ||
| 21-Nov-2015 | 4 | 10 | 6.57fghi | ||
| 22-Nov-2015 | 5 | 10 | 6.04hij | ||
| 23-Nov-2015 | 6 | 10 | 6.99efgh | ||
| 24-Nov-2015 | 7 | 10 | 6.00hij | ||
| 25-Nov-2015 | 8 | 10 | 11.32b | ||
| 26-Nov-2015 | 9 | 10 | 11.47b | ||
| 27-Nov-2015 | 10 | 10 | 11.27b | ||
| 28-Nov-2015 | 11 | 10 | 7.81de | ||
| 29-Nov-2015 | 12 | 10 | 6.40fghij | ||
| 30-Nov-2015 | 13 | 10 | 9.01c | ||
| 1-Dec-2015 | 14 | 10 | 6.02hij | ||
| 2-Dec-2015 | 15 | 10 | 8.32cd | ||
| 3-Dec-2015 | 16 | 10 | 6.40fghij | ||
| 4-Dec-2015 | 17 | 10 | 5.53jk | ||
| 5-Dec-2015 | 18 | 10 | 5.70ijk | ||
| 6-Dec-2015 | 19 | 10 | 7.09efg | ||
| 7-Dec-2015 | 20 | 10 | 6.28ghij | ||
| 8-Dec-2015 | 21 | 10 | 4.88kl | ||
| 9-Dec-2015 | 22 | 10 | 7.02efgh | ||
| 10-Dec-2015 | 23 | 10 | 8.13cd | ||
| 11-Dec-2015 | 24 | 10 | 7.33def | ||
| 12-Dec-2015 | 25 | 10 | 8.24cd | ||
| 13-Dec-2015 | 26 | 10 | 14.35a | ||
| Distance traveled by treatment group | |||||
| LRFI | All day | 5 | 7.34a | 0.305 | 0.5320 |
| HRFI | All day | 5 | 7.63a | ||
| Date | Day of study | n | Bites/min | P-value | |
| Bite rate by day of study | |||||
| 21-Nov-2015 | 4 | 9 | 55.2 ± 5.63e | <0.0001 | |
| 23-Nov-2015 | 6 | 9 | 66.3 ± 6.21ab | ||
| 24-Nov-2015 | 7 | 7 | 74.3 ± 5.49ac | ||
| 1-Dec-2015 | 14 | 10 | 64.2 ± 5.63b | ||
| 2-Dec-2015 | 15 | 9 | 65.6 ± 5.35b | ||
| 3-Dec-2015 | 16 | 10 | 81.3 ± 5.24cd | ||
| 7-Dec-2015 | 20 | 10 | 82.9 ± 5.14d | ||
| 8-Dec-2015 | 21 | 10 | 84.8 ± 5.32d | ||
| Bite rate by treatment group | |||||
| LRFI | All day | 5 | 78.4 ± 3.72a | 0.2158 | |
| HRFI | All day | 5 | 65.3 ± 9.31a |
1LRFI = low residual feed intake; HRFI = high residual feed intake.
a–lMeans within a column by dependent variable without a common superscript differ (P < 0.05). Winter storms occurred on 25 November, 30 November, and 13 December, 2015.