Association of automatic milking systems milking frequency in primiparous and multiparous cows with their yield and milkability

摘要

The aim of the study was to determine the association of automatic milking systems milking frequency (2.40, 2.41-2.80 and &2.80 times/day) in primiparous and multiparous cows with their daily milk yield and milkability. The analysis included of the milk production level and the interaction between milking frequency per day and daily milk yield. Regardless of the daily production level, most primiparous cows were milked 2.41-2.80 times/day and most multiparous cows &2.80 times/day. Higher daily milk yield and a more favourable effect of increasing milking frequency on this parameter were observed in multiparous cows, with an increase from 29.7kg (milking frequency 2.40 times/day) to 31.1kg milk (&2.80 times/day). In primiparous cows, this increase was smaller and amounted to 0.8kg milk (from 29.2 to 30.0kg).