Association between Age at First Calving and Milk Yield in Holstein Cows reared in Pelagonia

Karapetkovska-Hristova, Vesna and Bebic, Zarko and Makarijoski, Borche and Limani, Bardhyl and Ntsefong, Godswill (2021) Association between Age at First Calving and Milk Yield in Holstein Cows reared in Pelagonia. Journal of Engineering and Technology, 2 (1). pp. 16-20. ISSN : 2708-5155

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Abstract: The objective of this study was to analyse the influence of the age at first
calving on the length of lactation and the milk yield of Holstein – Friesian cows. In this
survey, sixty primiparous cows were analysed, divided in three groups (A-early, B-middle
and C-late). All the research parameters were taken from the farm’s book keeping records.
LSD method was used to calculate the statistical significance of the differences in the
seasons and the groups of cows to a significance level of 0.05 and 0.01. There was a
significant difference of the parameter daily milk yield between the groups A and C, p<
0.05. Group B showed significant difference p < 0.05 compared to group C. The results
obtained for the 305 day lactation suggested that group A was significantly different (p <
0.05) compared to group B. There was no significant difference in the length of lactation
among the groups of the cows. With this study we have determined the optimal age for
calving of the Holstein breed in the Pelagonia region farms to achieve better milk
Keywords: age of first calving, Holstein-Friesian breed, milk yield, lactation.

Item Type: Article
Subjects: Scientific Fields (Frascati) > Agricultural Sciences > Animal and diary science
Divisions: Faculty of Biotechnical Sciences
Depositing User: PhD Goran Mihajlovski
Date Deposited: 25 Dec 2023 11:37
Last Modified: 25 Dec 2023 11:37

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