Pregled bibliografske jedinice broj: 970781
Differences in persistency of heat stress effect in dairy primiparous cows due to cattle breed.
Differences in persistency of heat stress effect in dairy primiparous cows due to cattle breed. // International Symposium on Animal Science 2018 / Popovic, Z. (ur.).
Beograd: Arhitektonski fakultet Univerziteta u Beogradu, 2018. str. 34-39 (predavanje, međunarodna recenzija, cjeloviti rad (in extenso), znanstveni)
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Naslov
Differences in persistency of heat stress effect
in dairy primiparous cows due to cattle breed.
Autori
Gantner, Vesna ; Dokić Dražen ; Gregić, Maja ; Vučković Goran ; Kuterovac, Krešo
Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni
Izvornik
International Symposium on Animal Science 2018
/ Popovic, Z. - Beograd : Arhitektonski fakultet Univerziteta u Beogradu, 2018, 34-39
ISBN
978-86-7834-316-2
Skup
International Symposium on Animal Science
Mjesto i datum
Zemun, Srbija; Beograd, Srbija, 22.11.2018. - 23.11.2018
Vrsta sudjelovanja
Predavanje
Vrsta recenzije
Međunarodna recenzija
Ključne riječi
heat stress ; persistency ; primiparous cows ; daily milk yield ; cattle breed
Sažetak
Aiming determination of the persistency of heat stress effect in dairy primiparous cows regarding the breed (Holstein, Simmental) and susceptibility to heat stress test-day records provided by the Croatian Agricultural Agency were analysed. Only cows with detected statistically significant decrease in daily milk yield at set temperature-humidity index (THI) threshold value (65, 70 and 75) were included in the further analyses. The persistency of heat stress effect regarding the daily milk yield and milk contents (fat and protein) was determined as a drop in the subsequent milk recordings (1st and 2nd). Holstein cows had higher drop in daily milk yield compared to Simmentals in both subsequent milk recordings. The analysis of drop in daily milk contents, fat and protein, showed a higher drop in daily fat than protein content with similar values in both breeds. Also, the amount of drop increased in the 2nd compared to the 1st subsequent milk recording in both breeds. The research results indicate that the negative effect of heat stress was more pronounced and more persistent in Holsteins compared to Simmental cows. Also, the negative effect of heat stress was more pronounced and more persistent in cows that were more susceptible to heat stress (heat stressed at the lower THI threshold values). Finally, as cows are less resistant to the heat stress (more susceptible, Holstein breed), the heat stress effect is more severe (the drop is higher and more persistent).
Izvorni jezik
Engleski
Znanstvena područja
Biotehnologija
POVEZANOST RADA
Ustanove:
Fakultet agrobiotehničkih znanosti Osijek
