Effect of temperature-humidity index on physiological and haematological indicators in dairy cows [Vliv teplotně-vlhkostního indexu na fyziologické a hematologické ukazatele dojnic]
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43210%2F23%3A43924633" target="_blank" >RIV/62156489:43210/23:43924633 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.5513/JCEA01/24.4.3960" target="_blank" >https://doi.org/10.5513/JCEA01/24.4.3960</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.5513/JCEA01/24.4.3960" target="_blank" >10.5513/JCEA01/24.4.3960</a>
Alternative languages
Result language
angličtina
Original language name
Effect of temperature-humidity index on physiological and haematological indicators in dairy cows [Vliv teplotně-vlhkostního indexu na fyziologické a hematologické ukazatele dojnic]
Original language description
Heat stress in cows is commonly assessed using the temperature and humidity index (THI), a combination of ambient temperature and relative humidity. In this study, the influence of the THI on haematological and other physiological indicators in cows was evaluated. A significant difference was found in respiratory rate; when THI increased above 70 breaths/min, respiratory rate increased from 19.8 to 34.4 breaths/min. When THI increased above 80 breaths/min, there was a sharp increase in respiratory rate to 128.8 breaths/min. This was observed between 3 and 4 clocks in the afternoon when the highest thermal stress was assumed in dairy cows. The correlation coefficient between THI and body temperature was 0.38, but when weighted averages of minimum temperatures for three days were used, the correlation coefficient increased to 0.48. Based on these results, it is more reasonable to use the minimum THI over several days. At critical temperatures, haemoglobin decreased to 115.45 +- 23.12 g/l, compared with values measured in dairy cows under optimal conditions. However, these values did not fall below 125 g/l. A similar trend was observed for hematocrit under optimal conditions it was 34.42 +- 1.03%, and under stress, it was 37.5-39.12%. The number of erythrocytes was the lowest (6.51 +- 0.137 x 1012/l) in the most heat-stressed dairy cow group.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
40201 - Animal and dairy science; (Animal biotechnology to be 4.4)
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Central European Agriculture
ISSN
1332-9049
e-ISSN
1332-9049
Volume of the periodical
24
Issue of the periodical within the volume
4
Country of publishing house
HR - CROATIA
Number of pages
7
Pages from-to
802-808
UT code for WoS article
001128571600001
EID of the result in the Scopus database
2-s2.0-85180182627