Parameter | Value |
---|---|
Small herds (cows, heifers, calves) | ImpoCattle (24, 18, 2)a, NoImpoCattle (1, 0, 0)a |
Medium herds (cows, heifers, calves) | ImpoCattle (180, 138, 10)a, NoImpoCattle (123, 94, 6)a |
Large herds (cows, heifers, calves) | ImpoCattle (1070, 820, 66)a, NoImpoCattle (1185, 908, 64)a |
Culling rate per year for cows | Pert distribution (min = 32 %, mode = 38 %, max = 43 %)b |
Culling rate per year for heifers | Pert (4, 7, 12 %)b |
Culling rate per year for calves | Pert (5, 12, 17 %)b |
Parity distribution (1st, 2nd, 3rd and 4th) | (31, 27, 22, and 20 %)b |
Percentage of dry cows | Pert (12, 17, 20 %)b |
Age in the heifers group (in days) | (700; 768; 870)b |
Days of inter-calving per cow between parity 1 and 2 | (365, 399, 451)b |
Days of lactation per cow between parity 1 and 2 | (305, 339, 391)b |
Days of inter-calving per cow after parity 2 | (370, 391, 456)b |
Days of lactation per cow after parity 2 | (310, 331, 396)b |