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Influence of constructive features of cowshed on the formation of microclimate and qualitative indicators of milk

The state of the microclimate in the light-frame, reconstructed cowshed and milking parlor with a loose-box method of keeping a dairy herd in the spring was studied; the influence of different conditions and parameters of the microclimate on milk quality was investigated. It was found that the temperature in the reconstructed cowshed with forced milking in the hall by the milking machine «Yalynka» averaged 14.27 ± 2.105 ° C, while in the milking parlor the temperature was slightly higher than 16.38 ± 1.335 ° C. In the light frame cowshed the temperature was 12.24 ± 1.380 ° С, and in the milking zone of cows with the robotic installation almost without deviation 12.14 ± 1.715 ° С. Humidity and speed of air movement in the compared rooms was within the hygienic norms. Microbiological indicators of bacterial air pollution in both rooms correspond to hygienic norms, but in the reconstructed cowshed the number of colony-forming units in 1 m3 was higher. The largest number of colony-forming units in 1 m3 was recorded in the air of the milking parlor where the UDE-8 "Yalynka" unit is located due to insufficient ventilation, high humidity and temperature. Dispersion of the tiny drops from the cows udder in the air and other body limbs, equipment and fences when washing the milking parlor with water under pressure. In a light frame cowshed with free milking with a robotic unit at the ALC "Terezyne", the acidity of milk was 16.4 ± 0.64 ° T; the purity degree was according to the standard of the first group, the temperature 30 minutes after milking was 4.2 ± 0.57 ° C; microbial contamination of milk was on average 233.4 ± 8.64 thousand CFU / cm3; the titre of colon bacillus group was about one; the number of somatic cells was 376.9 ± 29 thousand / cm3, which ultimately corresponded to the highest grade according to DSTU 3662: 2018. When milking by the UDE-8 "Yalynka", the acidity of the obtained milk was 18.6 ± 0.42 ° T; the degree of purity according to the standard corresponded to the first group, the temperature 30 minutes after milking was 5.8 ± 0.71 ° C; microbial contamination of milk averaged 292.3 ± 12.3 thousand CFU / cm3; the titre of colon bacillus group was about one; the number of somatic cells was 465.7 ± 19 thousand / cm3, which ultimately corresponded to the first grade according to DSTU 3662: 2018. Therefore, the maintenance of the dairy herd in both light-frame and reconstructed premises allows to form a sufficiently comfortable sanitary and hygienic conditions. The increase in microbial contamination of milk obtained from cows in the milking parlor by UDE- 8 "Yalynka" is the result of insufficient operation of the ventilation system of the milking parlor and improper implementation of certain elements of preparation of animals for milking.

Key words: light-frame cowshed, microclimate, milking parlor, milk quality.

GRYSHKO V. https://orcid.org/0000-0002-0340-513x


BALYTSKYI Yu. https://orcid.org/0000-0002-3117-9467


MALYNA V. https://orcid.org/0000-0002-1319-9026


FEDORCHENKO M.


BONDARENKO L. https://orcid.org/0000-0003-3751-9140


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BTF №1 2022