title: [Effect of the diet containing rendering fats on the milk yield and vitamin E content in the milk of dairy cows].
abstract: In three groups of first-calvers with 15 animals each, with an identical basal diet, we followed for six months the effect of the DOB mixture additive without fat, the DOB mixture with 5% of rendering-plant fat obtained mechanically and DOB with 5% of rendering-plant fat after perchlorethylene extraction (0.90% perchlorethylene residuum). This additive of rendering-plant fats in concentrate mixtures as a substitute for grain in our experiment increased milk efficiency and the production of milk fat parallelled by a saving of concentrated feeds. An addition of rendering-plant fats which were often of low quality resulted in a decrease in vitamin E content in the blood serum and milk.
mesh_terms: D000821:Animal Feed; D000818:Animals; D002417:Cattle; D004041:Dietary Fats / Q000008:administration & dosage*; D005503:Food Additives; D008892:Milk / Q000032:analysis*; D014810:Vitamin E / Q000032:analysis*
chemical_list: D004041:Dietary Fats; D005503:Food Additives; D014810:Vitamin E
vernacular_title: Vliv diet s prídavky kafilerních tuků na mlécnou uzitkovost a na obsah vitamínu E v mléce dojnic.