Связь между массовой долей жира, удоем и показателями сервис‑периода у крупного рогатого скота в высокопродуктивных стадах

Abstract

The work is devoted to studying the relationship between the duration of the service period, quantitative and qualitative indicators of milk content in groups of highly productive cows, divided in accordance with the 3σ rule according to MFA in the UK with different values of the service period. With the visible dynamics of an increase in productivity indicators, accompanied by an increase in the service period, only a slight connection was established between the duration of the service period with the level of milk productivity and the amount of milk fat, however, no statistically significant differences were identified, which indicates a significant influence on the above characteristics of feeding and housing technology animals. At the same time, in all groups divided by the size of the service period in accordance with the 3σ rule, in terms of milk yield and milk fat, a level of variability was noted approaching 20 %, which indicates the influence of the genetic component (combinative variability) on these characteristics and opens further opportunities to improve the breeding process.