An energy-protein feed additive containing different sources of fat improves feed intake and milk performance of dairy cows in mid-lactation

Piotr Micek , Zygmunt Kowalski , Marek Sady , Jolanta Oprządek , Jacek Domagała , Patrycja Wanat


This research paper addresses the hypothesis that calcium salts combined with whole linseed and heat-treated rapeseed cake in one feed additive may efficiently stimulate the productivity of dairy cows and have a positive effect on the functional (health-promoting) properties of milk fat. The article proposes the composition of such an additive (EFA) and evaluates its nutritional effect in the diet of mid-lactation dairy cows. Forty multiparous Polish Holstein-Friesian (PHF) dairy cows were allocated to one of four treatments (10 cows/treatment) and fed a TMR diet without EFA or with EFA in the amount of 1, 2 or 3 kg/d per head for a 63-d-period. Individual intake of dry matter (DMI) and nutrients was determined, as was milk yield and composition, including fatty acid profile, fat soluble vitamins, cholesterol and phospholipids (PLs). Irrespective of the treatment group, cows fed diets with EFA had higher (P < 0.05) DMI, milk yield and milk vitamin D3 and K2 concentration but lower (P < 0.01) milk protein, fat and cholesterol contents. The additive did not affect the milk concentrations of β-carotene or vitamin A or E. The PLs content was correlated with fat concentration in the milk and decreased as the level of EFA in the diet increased. An increase in phosphatidylcholine in total PLs was accompanied by a reduction in the proportion of sphingomyelin (P < 0.05). The use of EFA increased the proportion of polyunsaturated fatty acids (PUFA) in the total fatty acids in the milk. The addition of EFA in the amount of 3 kg increased the proportion of PUFA by 77% (P < 0.05). In conclusion, the use of an energy-protein feed additive (EFA) increases feed intake and milk yield in cows and alters milk fat composition, improving its functional properties. Higher milk production compensates for the decrease in solids concentration in the milk, which has no effect on their daily yield.
Author Piotr Micek (FoAS / DoANaD)
Piotr Micek,,
- Department of Animal Nutrition and Dietetics
, Zygmunt Kowalski (FoAS / DoANaD)
Zygmunt Kowalski,,
- Department of Animal Nutrition and Dietetics
, Marek Sady (FoFT / DoAPT)
Marek Sady,,
- Department of Animal Product Technology
, Jolanta Oprządek
Jolanta Oprządek,,
, Jacek Domagała (FoFT / DoAPT)
Jacek Domagała,,
- Department of Animal Product Technology
, Patrycja Wanat (FoFT / DoAPT)
Patrycja Wanat,,
- Department of Animal Product Technology
Journal seriesJournal of Dairy Research, ISSN 0022-0299, e-ISSN 1469-7629, (N/A 100 pkt)
Issue year2019
Publication size in sheets0.5
Keywords in EnglishCalcium salts, dairy cows, feed additive, linseed,milk yield and composition
ASJC Classification2700 General Medicine; 1103 Animal Science and Zoology; 1106 Food Science
Languageen angielski
Score (nominal)100
Score sourcejournalList
Publication indicators WoS Citations = 0; Scopus SNIP (Source Normalised Impact per Paper): 2018 = 0.69; WoS Impact Factor: 2018 = 1.421 (2) - 2018=1.661 (5)
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