Analysis of phytoncidal pine paste use in the diets of deep-calving and fresh-calving cows

The article presents the results of scientific and economic experience in feeding phytoncidal pine paste to cows and heifers during the pregnant and fresh-calving periods. The purpose of the experiment was to study the effect of the additive on health and metabolism, stress resistance, milk productivity and milk quality. As a result of research and analysis, it was revealed that the animals in the experimental group had a 100% normal course of calving, the control group had one obstetric delivery and three cases of retained placenta. The content of cortisol in the blood of animals in the experimental group after calving was higher compared to cows in the control group and, in cows, higher compared to heifers in both groups. According to biochemical blood parameters, the content of total protein and cholesterol in the cows of the experimental group significantly increased by the end of the experiment compared to the control group. The content of alkaline phosphatase decreased to standard values. In terms of milk productivity, the cows in the experimental group produced 3.1 kg more milk and their increase in milk yield relative to the beginning of the experiment was higher than in the control group by 2.5 kg. The quality of milk is higher in animals of the experimental group: fat - by 0.36 - 0.07%, protein - by 0.05-0.08%. Somatic cells were lower in the cows of the experimental group by 795 thousand in May and by 18 thousand in June. The economic efficiency per day in terms of productivity was 41.60 rubles per head, the forecast for lactation was on average 12,688 rubles per head higher than in the control.