Lifetime Production Milk and Milk Fat in Simmental Cows
Životna proizvodnja mleka i mlečne masti kod krava simentalske rase
Author
Petrovic, Milun
Bogdanovic, Vladan
Bogosavljevic-Boskovic, Snezana
Rakonjac, Simeon
Djokovic, Radojica
Doskovic, Vladimir
Keywords
lifetime productionsimmental cows
milk
milk fat
životna proizvodnja
simentalska rasa
mleko
mlečna mast
Metadata
Show full item recordAbstract
This study was conducted to evaluate the phenotypic expression and variability of
lifetime performance traits (lifetime yields of milk, fat and 4%FCM, milk fat content,
milk yield per milking day, milk yield per day of productive life and milk yield per day
of life) and the effect of systematic factors (breeding region, total lactation number, year
of birth and season of birth) and age at first conception on the above traits in 2548
Simmental cows.
The test Simmental cows achieved the following: lifetime yields of milk, fat and
4%FCM - 14604, 554.8 and 14157 kg, respectively, milk fat content of lifetime milk
yield - 3.81%, milk yield per milking day - 12.79, milk yield per day of productive life -
9.31 and milk yield per day of life - 5.46 kg. The marked variability of the traits, along
with a certain percent of high-producing cows, enables further success in their selection. Ispitivanje fenotipske ispoljenosti i varijabilnosti osobina životne
proizvodnje (životna proizvodnja mleka, mlečne masti i 4%MKM, sadržaj mlečne masti
kao i proizvodnja mleka po muznom produktivnom i životnom danu) izvršeno je na
uzorku od 2548 krava simentalske rase.
Na analiziranom uzorku simentalskih krava ostvarena životna proizvodnja mleka,
mlečne masti i 4%MKM iznosila je 14604, 554.8 i 14157 kg, sadržaj mlečne masti životne
proizvodnje mleka 3.81%, dok je proizvodnja mleka po muznom, produktivnom i životnom
danu iznosila 12.79, 9.31 i 5.46 kg. Izražena varijabilnost ovih osobina, sa izvesnim
procentom visoko proizvodnih grla, omogućava dalji uspešan rad u njihovoj selekciji.