PHYSICAL AND CHEMICAL INDICES OF COW COLOSTRUM AFTER ADMINISTRATION OF A BIOGENIC DRUG
The experiment was carried out under production conditions on the farm of the AO “Uchkhoz Prigorodnoye”; the study involved dry Black-Pied cows of the Priobskiy type. To conduct the experiment, four groups of 10 comparable dry cows were formed. The biogenic drug was administered to dry cows four times at an interval of 14 days. Natural saline solution was injected to the animals of the control group at a dose of 22.5 mL per head; the biogenic drug was injected to the cows of the 1st, 2nd and 3rd trial groups at doses of 15, 22.5 and 30 mL per head, respectively. The injection different doses of the new tested drug to pregnant dry cows contributed to increased colostrum yields; the best result was found in cows of the 2nd trial group, the biogenic drug to the cows was administered at a dose of 22.5 mL per head; the yield of colostrum on the first day of lactation was by 23.1% higher (P ≥ 0.95) than that of the control animals. The highest physical and chemical indices of colostrum were revealed in cows to the biogenic drug was administered at a dose of 30 mL per head. As compared to the control, the protein content increased by 3.9% (P ≥ 0.95); casein in % of protein and whey proteins in % of protein - from 0.3 to 3.0%; the level of immunoglobulins - by 65.7% (P ≥ 0.95); solids content and nonfat milk solids - by 1.6 and 3.8% (P ≥ 0.95); density - by 1.8% (P ≥ 0.95).