Naslov
The effect of breeding region on differences in persistency of heat stress effect in first parity Simmentals

Autori
Gantner, Vesna ; Gavran, Mirna ; Dokić, Dragan ; Važić, Božo ; Gregić, Maja ; Bobić, Tina

Izvornik
Agroznanje (1512-6412) 20 (2019), 2; 75-83

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
heat stress ; persistency ; first parity Simmentals ; daily milk traits ; breeding region

Sažetak
In order to determine the effect of breeding region on differences in persistency of heat stress effect in first parity Simmentals 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 traits was determined as a drop in the subsequent milk recordings (1stand 2nd). The research results indicate significant difference in animals’ response to heat stress effect due to breeding region and individual’s susceptibility to heat stress. The most pronounced and persistent negative effect of heat stress was determined in cows reared in Eastern region. Also, the negative effect of heat stress was more pronounced and more persistent in Simmentals that were heat stressed at the lower THI threshold values (cows that are more susceptible to heat stress).

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

POVEZANOST RADA