Application of an experimental probiotic preparation in feeding of calves of the dairy period of rearing

Application of experimental probiotic preparation in feeding of calves of dairy period of rearing is shown. The study was carried out on the basis of the branch of FSBRIF FASCA “BF Komsomolskoye” on young black-and-white breed calves from birth to 9 months of age. Two groups of calves of 10 heads each were formed according to the principle of analogue groups. Calves of the control group received the basic diet, calves of the experimental group - additionally liquid experimental probiotic preparation based on Lactobacillus plantarum and Propionibacterium freudenreichii spp. from Siberian collection of microorganisms of Siberian Research Institute of Cheese Making department of FSBSI Federal Altai Scientific Center for Agrobiotechnologies, in doses: 40 ml/head from day 11–20, 50 ml/head from day 21–30, 70 ml/head from day 31–40. When feeding animals of the experimental group experimental probiotic preparation, for the first three months, there was no significant difference in live weight. At 6 months of age there was an increase in live weight by 1.2 % in comparison with the animals of the control group, at 9 months of age - by 3.0 %, the difference is reliable (p < 0.05). The maximum value of relative live weight gain was observed at six months of age of calves, the difference with the control was 5.8 %. For 9 months of growing calves of the control group absolute live weight gain of the experimental group exceeded the control group by 6.8 kg, average daily gain increased by 8 % in favour of the experimental group. Probiotic preparation had no negative effect on some indicators of protein and carbohydrate-fat metabolism. Albumin in blood serum of calves had high values, with predominance in animals receiving probiotic preparation by 2,3 % (p < 0,01). The α-globulins and β-globulins remained within the reference values, the difference with the control is reliable and is 3.2 % (p < 0.01) and 4.2 % (p < 0.05), respectively. The amount of γ-globulins in the experimental groups exceeds the reference values by 6.7–22.2 %. The level of cholesterol in the blood of calves of experimental groups was within the reference values with some decrease in the experimental group by 5.3 % (p < 0.001). The level of total protein in calves has underestimated values in control and experimental groups by 1.1 and 4.9 % compared to reference values.

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