Dynamics of milk productivity of cows in conditions of robotic milking

The results of research on the dynamics of lactation activity of cows in conditions of robotic milking are presented. The objects of the study were Holstein cows bred in Timiryazevo LLC in the Baltasinsky district of the Republic of Tatarstan. The animals were milked by Fullwood Merlin M2 milking robots. For three lactation periods, the minimum productivity was for the first (7897.9 kg), the maximum was for the second (8121.2 kg). The lowest lactation consistency coefficient was observed for the third lactation (97.9), the highest for the first (104.1). The difference in average productivity over the months of lactation was minimal during the second lactation (5.9 %), maximum during the third (18.6 %). Lactation curves have a multi-vertex appearance, which may indicate unstable production conditions. The coefficients of repeatability of dairy productivity of cows between lactation have average values - from 0.46 between the first and third lactation and up to 0.67 between the second and third.