The efficiency of probiotics use in feeding dairy cows

The purpose of the research was to study the effect of “Rumit” and “Coelobacterin+”supplement feeds on physiological state and productive indicators of newly-calved cows. The research tasks were the analysis of morphological and biochemical parameters of newly-calved cows’ blood, the effect of supplement feeds on the level and quality of dairy products, and the calculation of economic efficiency of the studied preparations. Scientific and farm experiment was conducted in the conditions of agricultural cooperative collective farm“Peredovoy” of Vologda Region on first-calf cows of black-and-motley breed. Three groups having 12 animals in each were formed (control group and two experimental groups) on the first hundred days of lactation. The animals of control group received farm diet, and the cows of experimental groups were fed 50 g of probiotics of “Rumit” and “Coelobacterin+” per head a day. The experiment lasted for 90 days. It was found out that using supplement feeds of “Rumit” and “Coelobacterin+” positively affected physiological state and metabolic processes in animals’ organisms. Thus, the cows of experimental group, compared with control ones, demonstrated a higher number of erythrocytes in the blood by 0.6×1012/l and 0.1×1012/l, hemoglobin by 11.6 and 3.2 g/l, and the decrease in the number of leukocytes in the blood of 4.3×109/l and 5.2×109/l respectively. When analyzing blood biochemical parameters of experimental animals’ blood, compared with control group, one should mention the increase in the total protein content by 0.7 and 1.0 g/l, albumins 0.8 and 1.2 g/l. Along with that, by the research the increase in the level of milk productivity of first-calf cows which received the supplements was found out, compared with control group, it was by 9.3 and 6.6 % respectively. Additional profit from milk sale in experimental groups was 78.0 and 29.5 rubles per head a day. The obtained research results allow us to consider the probiotics of “Rumit” and “Coelobacterin+” in the dosage of 50 g/head a day effective for feeding lactating dairy cows.