TEMPERATURE-MOISTURE MODE OF THE MODERN BROWNER AT LOW AIR TEMPERATURES
DOI:
https://doi.org/10.31548/ujvs2019.04.008Abstract
Abstract. The results of studies of the temperature-humidity regime of the air in the barn of the frame type intended for large-group unleaded boxing retention of lactating cows under the action of low ambient air temperatures are presented. It was found that the temperature does not meet hygienic standards due to the low ambient temperature, floor temperature and manure ducts, litter box for resting cows, interior equipment, feed and water in the frame barn. A significant decrease in air temperature to - 0.39 - (-2.62 0C) was registered in cowsheds during the night hours, which was accompanied by an increase in relative humidity to 75.6 - 76.2 % and ammonia content to 25.0 - 33.7 mg / m3. Negative indicators of the temperature of the floor, the interior equipment, as well as the feed mixture in the night and morning hours in the studied barns were established, the value of which averaged - 0.43- (-) 6.6 0C. In the majority of cases, the speed of air movement in frame-type cowsheds is hygienic, but as revealed by night-time research is much lower than in the afternoon, which is due to technological operations - movement of transport and movement of animals. The temperature of the surface of the lair in the boxes for resting animals at low ambient air temperature during the day varied from - 1.6 to 7.0 0C and during the night and especially in the morning hours acquired negative values, different from similar indicators in the afternoon.
Obtained data on the temperature and humidity regime in frame cowsheds designed for large-group unattached boxing retention of lactating cows should be used to optimize the microclimate in buildings under the action of low air temperatures.
Keywords: barn, air, temperature, relative humidity, speed of movement, ammonia, floor, feed, water
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