EN
The purpose of the study was to determine the degree of interrelationship between the udder surface temperature, heat flux and microclimatic conditions in the cow-shed, and different periods of lactation. A considerable diffe- rentation of udder temperature was found depending on the place of measurement. The highest temperature was found in the milk antrum and the lowest at teats. Udder skin temperature and the magnitude of heat flux from its surface were dependent mainly on air temperature, air velocity and cooling. External udder temperature was the lowest at air temperature ranging from 16.4 to 17.4°C. At the same time heat flux from the udder surface was the highest. Above the temperature range there occurred an increase of skin temperature and the value of heat flux decreased. The highest temperature of the udder was observed at 6-7 months after delivery, although that increase could have been the outcome of seasonal air temperature growth during that period. No marked influence of lactation period on the biothermic indices of the udder was found.