INFLUENCE OF ENVIRONMENTAL PARAMETERS IN VARIOUS SEASONS OF THE YEAR ON THE MICROCLIMATE OF ANIMAL HUSBANDRY FARMS

The paper presents the material of experimental studies on the influence of external environmental conditions on the microclimate of livestock buildings and, in turn, on the incidence of respiratory diseases and productivity of animals contained in them. During the researches it was established that in summer, when temperature and humidity of outside air are elevated, these parameters inside livestock buildings also increase. In summer, the bacterial contamination of the air inside livestock buildings increases, which in turn increases the bacterial load on the animals. The incidence of calves with respiratory diseases compared with the spring period increased by 57,8%. Analysis of the productivity of cattle in spring and summer periods did not show a significant difference. The highest increase in live weight in calves was recorded in July – 0,823 kg/day. Milk productivity tends to rise in summer, the peak of milk production was registered in June – 22,3 kg.