Changes in biochemical parameters of cows blood and the effect of feed additive on health during the transition period

After analyzing the analyzed literature, we decided to determine the influence of the transition and mineral additive on blood biochemical indicators and milk composition, therefore we set these goals and objectives of work. Aims of the work: 1) to determine the influence of cows' transition period on blood biochemical indicators and milk composition; Tasks of the work: 1) To determine and evaluate the change of blood biochemical indicators of cows in the transition period. 2) Identify and evaluate cow microelement changes in the serum during the transition period. 3) To evaluate the influence of mineral additive on blood biochemical parameters of cows. 4) To evaluate the influence of mineral additive on cow's milk composition (within the first month after calving). The study was carried out in July-June 2018 at farm X in Pakruojis district. The cows are kept mixed - grazing in the pasture in summer, and bonded storage is used when the weather is cool. During the research period about 850 dairy cows (LJ, AN, LŽ varieties) were farmed. For the analysis of biochemical blood parameters and milk composition, 30 clinically healthy cows were selected that were broken during the study. Two groups of clinically healthy cows were formed - the test and control group. The cow group consisted of 15 cows, the control also included 15 cows. The cattle were randomly selected regardless of age. Mineral boluses were injected into the rumen during the cracking of the study group. Blood biochemical parameters were analyzed in LSMU VA Large Animal Clinic. Milk fat, protein, lactose, and urea are tested using the “LactoScopeFTIR”, a mid-range infrared meter. The number of somatic cells in the milk was determined using the “Somascope” meter. The study showed that the following indicators varied during the transition period: AST, GGT, Fe, P, Mg, Alb, Kreat and others. (p 0.05). In the first month of lactation, the mineral supplement had no statistically significant effect on cow's milk composition (p> 0.05)