Table 2.
Descriptive reproduction parameters.
| Conventional | Organic | |||||||
|---|---|---|---|---|---|---|---|---|
| n | median | mean | 95% CI | n | median | mean | 95% CI | |
| Calving interval | ||||||||
| Overall | 1112 | 367 | 376.3 | 373.5, 379.0 | 1102 | 365 | 375.6 | 372.7, 378.5 |
| Only AI | 10741 | 366 | 375.8 | 373.0, 378.5 | 9221 | 368 | 379.5 | 376.4, 382.6 |
| Only natural mating | 371 | 382 | 386.1a | 372.4, 399.7 | 1771 | 341 | 355.0b | 347.7, 362.4 |
| Days open | ||||||||
| Overall | 1112 | 86 | 95.3 | 92.5, 98.0 | 1102 | 84 | 94.6 | 91.7, 97.5 |
| Only AI | 10741 | 85 | 94.8 | 92.0, 97.5 | 9221 | 87 | 98.5 | 95.4, 101.6 |
| Only natural mating | 371 | 101 | 105.1a | 91.4, 118.7 | 1771 | 60 | 74.0b | 66.7, 81.4 |
| CFAI | 1505 | 72 | 79.5 | 77.8, 81.2 | 1204 | 76 | 82.0 | 80.2, 83.8 |
| CLAI | 1505 | 90 | 98.8 | 96.4, 101.2 | 1204 | 90 | 99.0 | 96.5, 101.5 |
1 For one conventional and three organic cows that calved data was missing for breeding management and days open.
a, b Different subscripts indicates significant differences between conventional and organic farming by Bonferroni adjustment for multiple comparisons, P < 0.05
Calving interval (overall, AI only, naturalmating only), interval from calving to first AI (CFAI), interval from calving to last AI (CLAI), and number of AI per observations in conventional and organic farming.