Table 1 Descriptive statistics by herd (mean, with SD in parentheses where appropriate)
Research Herds | Commercial Herds | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | 2 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | |
Years | 10 | 10 | 5 | 5 | 5 | 4 | 5 | 5 | 4 | 5 | 4 | 4 |
Herd size | 42.80 (20.44) | 26.60 (21.87) | 40.20 (6.06) | 11.00 (7.35) | 29.80 (9.58) | 15.50 (2.89) | 14.40 (4.93) | 12.00 (5.52) | 17.50 (4.20) | 28.80 (3.56) | 16.25 (6.85) | 9.00 (6.00) |
Services per lactation | 1.27 (0.52) | 1.33 (0.65) | 1.24 (0.47) | 1.18 (0.47) | 1.20 (0.43) | 1.29 (0.55) | 1.31 (0.52) | 1.20 (0.40) | 1.06 (0.23) | 1.10 (0.30) | 1.14 (0.39) | 1.42 (0.77) |
Service conception rate (%) | 76.94 (42.16) | 73.24 (44.33) | 90.76 (29.01) | 61.54 (49.03) | 72.63 (44.71) | 68.75 (46.64) | 60.64 (49.12) | 88.89 (31.65) | 85.14 (35.82) | 87.34 (33.36) | 78.38 (41.45) | 80.39 (40.10) |
In calf within 84 d (%) | 95.53 (5.59) | 97.16 (4.05) | 94.32 (3.87) | 59.43 (42.01) | 78.46 (9.23) | 85.30 (11.31) | 77.34 (21.08) | 89.33 (15.35) | 86.57 (10.30) | 92.40 (2.71) | 88.69 (13.93) | 94.64 (6.84) |
Age at service (d) | 447 (30) | 455 (45) | 440 (33) | 537 (79) | 464 (58) | 488 (57) | 475 (61) | 445 (18) | 493 (68) | 461 (61) | 518 (53) | 463 (72) |
Monthly services (%) | ||||||||||||
April | 65.65 | 50.30 | 37.18 | 50.00 | 32.14 | 26.58 | 63.22 | 32.35 | 5.63 | 48.05 | 63.89 | 40.00 |
May | 27.70 | 36.14 | 61.54 | 7.81 | 56.55 | 41.77 | 22.99 | 66.18 | 80.28 | 50.65 | 27.78 | 31.11 |
June | 5.88 | 12.05 | 1.28 | 32.81 | 10.12 | 18.99 | 13.79 | 1.47 | 14.08 | 1.30 | 8.33 | 24.44 |
July | 0.76 | 1.51 | 0.00 | 9.38 | 1.19 | 12.66 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 4.44 |