EFFECT OF PROBIOTIC BIOGUMITEL-G SUPPLEMENT ON MILK YIELDS OF BLACK-SPOTTED COWS
The scientific-economic experiment was conducted in the «Geroi» APC (agricultural production cooperative), Chekmagushevsky district, Republic of Bashkortostan, in the period from 2011 to 2012. To carry out the experiment there were formed 4 groups of cows, aged 4-5 years, with 10 cows in each of them. The animals of group I (control) were fed on the basic ration, while those of group II (experimental) were fed the basic ration supplemented with 1.5 g of the Biogumitel - G probiotic per 10 kg live weight, group III (experimental ) - 3.0 g and group IV (experimental) - 6.0 g, respectively. Milk quality analysis and milk yields records were carried out in the first 100 days and 305 days of lactation. Moreover, there were also performed two-day control milkings every month during one lactation period. Every year, once a month, the content of fat and protein in milk was determined. In the course of analyses it was found that the highest indices were recorded for the milk of group III (experimental), the animals of which were fed on rations with the Biogumitel-G probiotic supplementation in the dose of 3.0 per 10 kg live weight.