COMPARATIVE RESEARCHES CONCERNING THE MILK PRODUCTION TRAITS ON BLACK AND WHITE CATTLE HERD OF FIRST CALVING, BREEDED IN PRIVATE FARMS FROM TRANSYLVANIA

In this study we will present some comparative elements regarding cowʹs milk production in first lactation breeding and exploited in some private farms from the counties of Alba and Mureg. The researches for main milk production trait were orientated to analyse the content and quantity of fat and protein, corresponding to normal and total lactation. According to purpose,a plan for conducting research work, especially depending on the present evidence in different farms, on the herd investigated, we wanted to put highlights the production performance of dairy cows breeded in different farms sizes. The effective included in the research is about 596 head of cows breeded in two counties from Transylvania: Alba and Mures respectively farms SC Stazoo with 145 heads, SC Unichim with 68 heads, SC Ambisco with 233 heads, and SC Agrocrig with 150 heads