Atragotu un ragainu govju produktivitātes un stresa vērtējums = Productivity and stress evaluation of dehorned and horned cows
2023
Aplociņa, Elita | Degola, Lilija | Kociņa, Iveta | Arbidāns, Dainis
The research was started at the end of 2022. The results have been compiled for less than a year. The productivity and keeping of cows from the dairy cow herds of the three farms involved in the study (names of farms A, B, and C) were analysed. The amount of milk yield, fat, protein and urea content, and the number of somatic cells in milk were analysed according to the indicators of the control days in the month. We took saliva samples from individual cows (n = 18 to 20) and determined the cortisol content. The results showed no differences in milk yield, milk components and somatic cell count between horned and dehorned cows. Cortisol levels in cow saliva ranged from 1.38 to 2.71 nmol LE−1. This indicator varied between farms’ cow herds by 24 to 49%. Cortisol content indicators in saliva are temporarily increased in cows by stress factors that occur during various manipulations with animals in barns.
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出版者 Latvijas Biozinātņu un tehnoloģiju universitāte
