The Indicators of milk composition and quality of dairy crossbred simmentals and holsteins

Abstract

The research was conducted to ascertain the positive benefits of crossbreeding for the quantitative and qualitative indicators of livestock production. The aim of the research was to perform a comparative analysis of the composition and quality rate of the milk produced by dairy Simmental crossbreeds and Holstein cows during lactation. The experiment involved the purebred Holstein cows of dairy breed and F1 generation crossbred Holstein x Simmental cows of dual purpose. Twenty cows of each breed were observed for one year. The research revealed that the yield (Simmental crossbreeds: 8951 l, Holstein 8665.7 l) during the year was similar in both breeds’ but the average annual fat content in the milk (0.32 percent) and protein (0.2 percent) was higher in crossbred Simmentals’ milk. The lactose content in the milk of both cow breeds differed 0.075 percent, and essential differences during the year were not observed, the average amount of urea in Holstein cows’ milk was 2.65 mg/100 ml, i.e. higher in comparison to crossbred Simmentals’. The quantity of somatic cells in Holstein cows’ milk during the year was 97.85 thousand/ml higher than in the milk of crossbred Simmentals (P<0.05).