EN
The purpose of study was to determine the effect of supplements added to the diet of cows during the "dried" period, on the subsequent milk production and offspring performances. The IInd experimental group of cows was fed with MONOMIX supplement, the IIIth group with Na₂HCO₃+MgO, the IVth group with B-composition, while the Ist group was settled as a control. It was concluded, that both, MONOMIX and Na₂HCO₃+MgO supplements had an advantageous influence on milk yield in cows, because the level of lactation in these cows was higher when compared to the previous production. Calves delivered from MONOMIX cows were characterized by the highest growth parameters, moreover, the highest total protein and gamma-globulin level were assigned in blood serum.Reversely, the lowest daily gain, total protein, gamma-globulin, glucose, carotin levels and the lower AP activity were found in those calves born from cows assigned to the Ist /control/ group.