The Effect of Breeding Region on Differences in Persistency of Heat Stress Effect in First Parity Simmentals

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


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 (1st and 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).

Пуни текст:



  • Тренутно не постоје рефбекови.

ISSN 1512-6412 (PRINT)

ISSN 2233-0070 (ONLINE)

Impressum časopisa Agroznanje

Papers should be submitted in electronic format via e-mail at or via regular postal mail as CD or USB to the address of Faculty of Agriculture in Banja Luka with notification: for editor’s office of Agro-knowledge Journal. The papers should be submitted as an open document made in Microsoft Word, in the format given in the Guide for Authors in due time. The papers that do not meet the deadline will not be submitted for review.



University of Banja Luka

Faculty of Agriculture (for editor’s office of Agro-knowledge Journal)

Bulevar vojvode Petra Bojovića 1A

78000 Banja Luka

Republic of Srpska

Bosnia and Herzegovina




Creative Commons License

ISSN 1512-6412 (PRINT)