A.N. Maslyuk, kandidat biologicheskih nauk, dotsent Uralskogo gosudarstvennogo agrarnogo universiteta
(Ekaterinburg, ul. Karla Libknehta, 42).
This is primarily due to the increased intensity of exchange, as well as the release of a large number of ash elements in milk. Also, to increase the usefulness of feeding are increasingly used in the preparations of complex action – synbiotics, which includes probiotics (live cultures), prebiotics (mannooligosaccharide) and enzymes. The combined use of vitamin-mineral premix and synbiotic "Rumistart" in rations of cows beginning a lactation con-tributed to the enrichment of the diet with biologically active substances. As a result, improved sanitary quality of milk (decreased bacterial contamination and the number of somatic cells), in-creased animal productivity by 26.9% for 100 days of lactation, increased milk fat content by an average of 11.3% compared to the control indicator. Inclusion in the diet of premix-7414 (300 g/head) and synbiotic "Rumistart" (40 g/head) led to an increase in production costs by 860,04 rubles, but due to the increase in milk yield and quality increased sales revenue by 12999 rubles, which led to an increase in the profitability of milk production in cows of the experimental group to 57%.
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