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Impact of parity number, milk production and somatic cell count on the reproduction of Holstein cows

Published online by Cambridge University Press:  27 February 2024

Bianca Letícia Barbosa ,
Victor Breno Pedrosa ,
Luciana da Silva Leal Karolewski ,
Caio César de Godoi  and
Adriana de Souza Martins
Bianca Letícia Barbosa
Affiliation:
Postgraduate Program in Animal Science/PPZ/UEPG, Ponta Grossa State University, Ponta Grossa, Paraná, Brazil
Victor Breno Pedrosa
Affiliation:
Postgraduate Program in Animal Science/PPZ/UEPG, Ponta Grossa State University, Ponta Grossa, Paraná, Brazil
Luciana da Silva Leal Karolewski
Affiliation:
Postgraduate Program in Animal Science/PPZ/UEPG, Ponta Grossa State University, Ponta Grossa, Paraná, Brazil
Caio César de Godoi
Affiliation:
Frísia Cooperativa Agroindustrial, Carambeí, Paraná, Brazil
Adriana de Souza Martins*
Affiliation:
Postgraduate Program in Animal Science/PPZ/UEPG, Ponta Grossa State University, Ponta Grossa, Paraná, Brazil
*
Corresponding author: Adriana de Souza Martins; Email: [email protected]
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Abstract

This research communication describes the reproductive and productive parameters and somatic cell count (SCC) of primiparous and multiparous cows from specialized dairy Holstein herds in South region of Brazil, and correlates these parameters using test-day records. A total of 24 011 records of animals from 75 producers obtained between 2017 and 2018 were used. The variables analyzed included milk production, SCC, milk fat, protein and urea nitrogen contents and reproductive characteristics (number of services per conception, service period and percentage of pregnant cows). Data were analyzed using multivariate logistic regression and the statistical differentiation between the classes of SCC and milk production. Milk production, SCC, number of services per conception and service period were all higher in multiparous cows. The percentage of pregnant cows was higher when the SCC was less than 200 000 cells/ml and was higher in primiparous cows. There was no adverse effect of milk production on reproductive parameters in high producing cows (>40 kg milk/d), however, the percentage of pregnant cows with this production level was significantly higher in multiparous cows. In conclusion, the milk production level need not affect the reproduction of specialized dairy cows if the animals are kept under adequate environmental conditions.

Keywords

Lactationmilk productionmultiparouspregnancyprimiparous cows
Type
Research Article
Information
Journal of Dairy Research , Volume 90 , Issue 4 , November 2023 , pp. 343 - 346
Copyright
Copyright © The Author(s), 2024. Published by Cambridge University Press on behalf of Hannah Dairy Research Foundation

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Footnotes

This article has been updated since its original publication. A notice detailing this change can be found here: https://doi.org/10.1017/S0022029924000177

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