[Influence of feed mixtures supplemented with animal fat on milk yield and milk composition]

Animal fat was administered in fat-supplemented mixtures of concentrates in amounts varying from 0%, 5%, to 10%. The trials were carried out on 12 dairy cows. The best results were obtained with mixed concentrates containing 5% of animal fat. Animals on these food rations produced 6.75% more milk (expressed in units of fat-corrected milk (FCM) and 9.87% more milk fat. Additions of animal fat affected the composition of milk fat in such a way that the milk contained smaller portions of short-chain fatty acids and higher proportions of stearic and oleic acid.