Influence of reproductive qualities on dairy productivity of cows of the Simmental breed

The aim of work is to explore influence first fruitful insemination, service period and dry dairy productivity Simmental cows. research aimed at studying the milk production cows with different levels reproductive qualities. result research, a relation was established between age duration period, performance. It has been that insemination 18-24 months most beneficial effect on subsequent production. 90-120 days positive an increase in yield per 305 lactation, longer negatively affects mass fraction fat. With fat increases, but decreases. qualities protein negligible. revealed profitable for According results it can be judged qualities, combination other factors, affect