Abstract
The objective of the present study was to evaluate the effect of the commercial complementary feedstuff inclusion into dairy cow nutrition on milk yield and quality. The studies were carried out in a specialized farm for 24 months. The research involved the cows with daily milk production exceeding 20 kg which, having obtained the intended milk yield, were selected successively on the basis of analogues into two treatment groups: control (C) and experimental (E). The experimental factor was a commercial mixture supplement (MS) incorporated into a TMR fed to the E cow group. During the study, the composition, quality and nutritional value of the administered feedstuffs (every 2 months) as well as the yield, composition and quality of cow milk (once a month) were analyzed. The present research indicated a significantly increased milk production efficiency of the cows fed a diet with MS addition of 50 g/day/animal at lactation. The application of the experimental mixture reduced the somatic cell counts (SCC) in milk by ca. 25%. Feed additive inclusion at the amount of 50 g daily per lactating animal is recommended to promote the cow health state, especially the mammary gland, and thus, to improve quality of the obtained milk.
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