THE LEVEL OF SELECTED MILK PERFORMANCE TRAITS OF IMPORTED AND HOME-BRED MONTBÉLIARDE COWS BORN IN DIFFERENT SEASONS AND CALVING AT DIFFERENT AGES
Journal Title: Acta Scientiarum Polonorum Zootechnica - Year 2016, Vol 15, Issue 4
Abstract
The aim was to analyse milk performance traits of Montbéliarde cows imported from France as pregnant heifers and those born in Poland, taking into account season of birth and age at first calving. Daily yield, content of fat, protein and lactose, fat-to-protein ratio, and somatic cell count in milk were analysed. Born in Poland cows had higher daily milk yields and a better fat-to-protein ratio than cows imported from France. The latter produced milk with better chemical composition. In terms of daily yield, calving ages at 855–915 days were most beneficial in both imported and homebred cows. Age at first calving had a greater effect on yield of born in Poland cows than on that of imported ones. In each range of age at first calving, higher fat and protein contents in the milk of imported cows as compared to cows born in Poland were noted. The somatic cell count in the milk may indicate somewhat better udder health in the born in Poland cows. In the case of both imported and home-bred cows, the spring/summer season of birth was associated with higher somatic cell count. In conclusion, the acclimatization process may have had a negative effect on the performance of cows imported as pregnant heifers from France.
Authors and Affiliations
Ewa Januś
Keywords
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- EP ID EP375063
- DOI 10.21005/asp.2016.15.4.02
- Views 116
- Downloads 0
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