At the start of lactation, the energy requirements of high-performance cows are usually not adequately covered by feed intake. The resulting energy deficit can have an impact on the health and fertility of the cows. In practice, the content of milk ingredients, such as fat/protein ratio, protein and fat content, are often used to assess energy supply. Blood parameters, such as beta-hydroxybutyric acid (BHB) and free fatty acids (FFS), also reflect the metabolic situation of the cows, but collecting and examining blood samples is more complex.
In a current study, extensive data from the HBLFA Raumberg-Gumpenstein was evaluated on the significance of milk and blood parameters (Gregoritsch and co. 2018). In particular, the significance of selective blood samples was examined in comparison to weekly average values of milk ingredients. In addition, the connection between the energy balance of cows and fertility results was also examined.
Trade press release
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