Environmental effect on the body condition and lactation of the dairy cattle

Master thesis: Environmental effect on the body condition and lactation of the dairy cattle. Author: Lina Kavaliauskienė, Lithuanian University of Health Sciences, Veterinary Academy, Kaunas, in 2015. Supervisor: prof. Dr. Rasa Želvytė. This thesis is written in the Lithuanian language and it consists of: introduction, literature review, research materials and methods, results, conclusions and recommendations and referentes, including 35 pages, it contains 2 tables, 9 images, used 44 references. The main aim of the thesis: to evaluate the influence of environmental factors on the body condition of cows and lactation. The results of the study and main conclusions The maximum fat content determined in May 5.34% ± 0.18% (P <0.0001), the average air temperature +15 ° C, humidity 65%. Minimum fat content in September 4.35% ± 0.12% (P <0.0001), when the average air temperature 8 ° C, humidity 62%. Protein found mainly in March of 3.8% ± 0.08% (P <0.0001), when the average air temperature 8 ° C, humidity 75%. August least 3.08% ± 0.07% (P <0.0001), when the average air temperature + 24 ° C, humidity 56%. The largest milk SCC established in February 930.5 ± 236.9 thousand. /ml, when the average ambient temperature of + 2 ° C, humidity 80%. The largest quantity of milk milking in January (68,160 ± 156 kg), the average ambient temperature + 5 ° C, humidity 85%, and the lowest in September (51,882 ± 1,714 kg) (P <0.05), when the average ambient temperature of +17 ° C, humidity 62%. The study found that the majority of clinical mastitis suffer from 47.7% in December, when the average air temperature of + 7 ° C, humidity 86%. July-August 39.4-41.6% of patients, the average was high ambient temperature (26-24 ° C) and low average air humidity 43-56%. The highest incidence of sublinical mastitis set in August. (22.2%), when the average air temperature of +24 ° C, humidity 56%, the lowest - in April (5.5%) (P