Studies on test-day and lactation milk, fat and protein yield of dairy cows

Data of milk recording provides the basis to control herd management and genetic improvement of cows. Different management guides can be presented to dairy farmers. Breeding values are predicted for 305-day yields in order to select bulls and cows. However, breeding values should be predicted as early as practicable, so as to increase genetic progress and minimize prediction bias by selection.To calculate mangement guides and predict breeding values, adjustment of individual milk, fat and protein records for age and season of calving and prediction of 305-day yields should be made. For early s... Mehr ...