Value of physiological parameters measured by the herd management software for dairy cows reproduction

The aim of this thesis - To analyze changes in GEA herd management software parameters (milk yield, milk electrical conductivity, body weight, activity and composition) for cows diagnosed with clinical endometritis. The tasks of this thesis: to evaluate cow’s milk yield, electrical conductivity, body weight, activity 7, 5, 2, 1 days before endometritis and 10, 20 days after diagnosis; to analyze the milk composition of cows before and after diagnosis. Methods and materials: Research was carried out during the period of June – November, 2019 in the farm „X“ located in Marijampolė region. 60 fresh dairy cows (up to 30 days of lactation) were selected for the study, which were divided into lactation groups 1st and ≥ 2nd. 1st lactation cows (n=40) consisted of 20 subjects diseased and healthy cows for each. ≥ 2nd lactating cows (n=20) with similar productivity (10,000 – 11,000 kg per season) were divided into diseased and control groups of 10 subjects each. The diagnosis of clinical endometritis was confirmed by clinical signs and rectal palpation results. The computerized herd management program recorded physiological parameters (milk yield, milk electrical conductivity, body weight, cow activity) 7, 5, 2, 1 day before and 10, 20 days after diagnosis of the disease. Additionally, the composition of milk (milk proteins, milk fats, milk somatic cell count) was analyzed before and after diagnosis of the disease. Results: Milk yield of 1st lactation cows averagely 6,36% (p<0,01), ≥ 2nd lactation - 12,80% (p<0,05) was lower than control group. Body weight averagely 8,04% (p<0,05) was higher in ≥ 2nd lactation cows compared to the control group. Activity of 1st lactation cows all measured days was 10,09% (p<0,05), ≥ 2nd lactation (20th day after diagnosis) - 18,82% (p<0,05) lower compared to the control group. The electrical conductivity of cows was not statistically significant. Before diagnosis proteins in milk of 1st lactation cows were higher 6,91% (p<0,05), ≥ 2nd lactation - 16,30% (p<0,01) lower than control group. After the disease, milk fats of 1st lactation cows 4,17% (p