WebSeveral groups have reported that a younger AFC in dairy heifers does not reduce, or may even increase, the first lactation yields, ... (Reference Endecott, Funston, Mulliniks and Roberts 2013) concluded that a somewhat lighter-than-usual target weight at breeding (50% to 57% compared with 60% to 65%) reduced rearing costs without impairing ... WebSep 24, 2024 · September and October are crucial times of the year for heifer rearing on dairy farms. You should now determine if your heifers are achieving their target weights. Yearling heifers should be 35% of their mature body weight, while in-calf heifers should be 75%. Your heifer’s mature body weight should be determined by the cows within your …
Reproduction and Genetics – Dairy
WebFirst to use higher target weights than those recommended by academic studies. First to use the Liveweight Breeding Value (BV Lwt) to calculate dairy heifer targets in 2007. First to develop an App named ‘BlueLinker’ for an Android phone to transfer data from electronic scales to format and send as an email attachment. WebMay 1, 2024 · These targets include: 30% of their adult body weight by 6 months-of-age. 60% of their adult body weight at bulling (15 months). 90% of adult body weight when … lorna shore tank tops
Growth Target Benchmarking - New Zealand Grazing
WebJan 1, 2024 · Heifers should be at 55% of their mature body weight at breeding, and at 85% of their mature body weight at calving. At freshening, the target body condition score should also be 3.5 on a 5-point scale. … WebKey target Table 1. Bodyweight (BW) targets for maiden heifers at breeding and for heifers pre-calving by breed/crossbreed. HF NZ HF*NZ NR HF*NR J HF*J 6-month heifer BW (kg) 175 160 175 160 175 125 145 Maiden heifer BW(kg) 330 315 330 315 330 240 295 approx 13 months old Pre-calving BW, (kg) 550 525 550 525 550 405 490 WebPre-calving heifers: 90 to 94% of the dairy herd’s mature body weight; Post-calving (1 st lactation): 80 to 84% of the dairy herd’s mature body weight; Fresh heifers need to be 80 to 84% of the herd’s mature body weight post-calving. This means if the herd’s average body weight of the 3 rd or greater lactation cows over 100 days in milk ... horizontal fibers