Analysis of age at first calving on productive and reproductive performance in first-lactation Holstein cows in an intensive system in Argentina

This study examined the relationship between age at first calving and milk production in Holstein heifers within an intensive system in the dairy basin of Córdoba, Argentina. Retrospective data from 452 cows calving between 2016 and 2017, aged between 23 and 32 months, were collected. The results re...

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Detalles Bibliográficos
Autores principales: Schultz, Milton E., Capellari, Adriana, Sánchez , Sebastián
Formato: Artículo revista
Lenguaje:Español
Publicado: Universidad Nacional del Nordeste 2023
Materias:
dairy cattle
data analysis
milk yield
days open
bovino lechero
análisis de datos
rendimiento de leche
días abiertos
Acceso en línea:https://revistas.unne.edu.ar/index.php/vet/article/view/7043
Aporte de:
Revistas UNNE - Universidad Nacional del Noroeste (UNNE) de Universidad Nacional del Nordeste
id I48-R154-article-7043
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institution Universidad Nacional del Nordeste
institution_str I-48
repository_str R-154
container_title_str Revistas UNNE - Universidad Nacional del Noroeste (UNNE)
language Español
format Artículo revista
topic dairy cattle
data analysis
milk yield
days open
bovino lechero
análisis de datos
rendimiento de leche
días abiertos
spellingShingle dairy cattle
data analysis
milk yield
days open
bovino lechero
análisis de datos
rendimiento de leche
días abiertos
Schultz, Milton E.
Capellari, Adriana
Sánchez , Sebastián
Analysis of age at first calving on productive and reproductive performance in first-lactation Holstein cows in an intensive system in Argentina
topic_facet dairy cattle
data analysis
milk yield
days open
bovino lechero
análisis de datos
rendimiento de leche
días abiertos
author Schultz, Milton E.
Capellari, Adriana
Sánchez , Sebastián
author_facet Schultz, Milton E.
Capellari, Adriana
Sánchez , Sebastián
author_sort Schultz, Milton E.
title Analysis of age at first calving on productive and reproductive performance in first-lactation Holstein cows in an intensive system in Argentina
title_short Analysis of age at first calving on productive and reproductive performance in first-lactation Holstein cows in an intensive system in Argentina
title_full Analysis of age at first calving on productive and reproductive performance in first-lactation Holstein cows in an intensive system in Argentina
title_fullStr Analysis of age at first calving on productive and reproductive performance in first-lactation Holstein cows in an intensive system in Argentina
title_full_unstemmed Analysis of age at first calving on productive and reproductive performance in first-lactation Holstein cows in an intensive system in Argentina
title_sort analysis of age at first calving on productive and reproductive performance in first-lactation holstein cows in an intensive system in argentina
description This study examined the relationship between age at first calving and milk production in Holstein heifers within an intensive system in the dairy basin of Córdoba, Argentina. Retrospective data from 452 cows calving between 2016 and 2017, aged between 23 and 32 months, were collected. The results revealed a significant decrease in adjusted 305-day milk yield as age at first calving increased. Cows calving at 24 months yielded higher total milk production by the end of lactation compared to those calving at 31 and 32 months. A significant difference in daily milk yield during lactation was observed based on age at first calving, while no significant effect of calving year was found. Total daily milk yield was also influenced by age at first calving, with cows calving at 24 months exhibiting higher production compared to those calving at 32 months. The dry period, representing the days from drying off to the start of the subsequent lactation, was also influenced by age at first calving, with significant differences observed between cows calving at 23 and 31 months, as well as at 24 and 31 months. In terms of reproductive variables, a significant difference in the calving interval was found based on age at first calving. No significant interaction between age at first calving and calving year was identified for any of the analyzed variables. In conclusion, this study demonstrated that age at first calving has a significant impact on milk production in Holstein cows within an intensive system. The findings suggest that placing greater emphasis on achieving first calving between 23 and 25 months of age may enhance productive and reproductive efficiency in dairy farms.
publisher Universidad Nacional del Nordeste
publishDate 2023
url https://revistas.unne.edu.ar/index.php/vet/article/view/7043
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spelling I48-R154-article-70432023-11-28T12:58:58Z Analysis of age at first calving on productive and reproductive performance in first-lactation Holstein cows in an intensive system in Argentina Análisis de la edad al primer parto en el desempeño productivo y reproductivo en la primera lactancia de vacas Holstein en un sistema intensivo de Argentina Schultz, Milton E. Capellari, Adriana Sánchez , Sebastián dairy cattle data analysis milk yield days open bovino lechero análisis de datos rendimiento de leche días abiertos This study examined the relationship between age at first calving and milk production in Holstein heifers within an intensive system in the dairy basin of Córdoba, Argentina. Retrospective data from 452 cows calving between 2016 and 2017, aged between 23 and 32 months, were collected. The results revealed a significant decrease in adjusted 305-day milk yield as age at first calving increased. Cows calving at 24 months yielded higher total milk production by the end of lactation compared to those calving at 31 and 32 months. A significant difference in daily milk yield during lactation was observed based on age at first calving, while no significant effect of calving year was found. Total daily milk yield was also influenced by age at first calving, with cows calving at 24 months exhibiting higher production compared to those calving at 32 months. The dry period, representing the days from drying off to the start of the subsequent lactation, was also influenced by age at first calving, with significant differences observed between cows calving at 23 and 31 months, as well as at 24 and 31 months. In terms of reproductive variables, a significant difference in the calving interval was found based on age at first calving. No significant interaction between age at first calving and calving year was identified for any of the analyzed variables. In conclusion, this study demonstrated that age at first calving has a significant impact on milk production in Holstein cows within an intensive system. The findings suggest that placing greater emphasis on achieving first calving between 23 and 25 months of age may enhance productive and reproductive efficiency in dairy farms. Este estudio analizó la relación entre la edad al primer parto y la producción de leche en vacas Holstein en un sistema intensivo en la cuenca lechera de Córdoba, Argentina. Se recopilaron datos retrospectivos de 452 vacas que parieron entre 2016 y 2017, con edades comprendidas entre 23 y 32 meses. Los resultados mostraron que a medida que la edad al primer parto aumenta, la producción de leche ajustada a los 305 días disminuye significativamente. Las vacas que parieron a los 24 meses produjeron más leche total al final de la lactancia en comparación con aquellas que parieron a los 31 y 32 meses. Se observó una diferencia significativa en la producción diaria de leche en lactancia según la edad al primer parto, pero no se encontró un efecto significativo del año de parto. La producción diaria total de leche también fue afectada por la edad al primer parto, con las vacas que parieron a los 24 meses mostrando una mayor producción en comparación con las que parieron a los 32 meses. El período seco, que representa los días desde el secado hasta el inicio de la próxima lactancia, también fue influenciado por la edad al primer parto, con diferencias significativas entre las vacas que parieron a los 23 y 31 meses, y a los 24 y 31 meses. En cuanto a las variables reproductivas, se encontró una diferencia significativa en el intervalo entre partos según la edad al primer parto. No se encontró una interacción significativa entre la edad al primer parto y el año de parto para ninguna de las variables analizadas. En conclusión, este estudio demostró que la edad al primer parto tiene un impacto significativo en la producción de leche de vacas Holstein en un sistema intensivo. Los resultados sugieren que un mayor énfasis en alcanzar un primer parto a una edad entre los 23 y 25 meses podría mejorar la eficiencia productiva y reproductiva en las explotaciones lecheras. Universidad Nacional del Nordeste 2023-11-28 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://revistas.unne.edu.ar/index.php/vet/article/view/7043 10.30972/vet.3427043 Revista Veterinaria; Vol. 34 Núm. 2 (2023); 48-54 1669-6840 1668-4834 spa https://revistas.unne.edu.ar/index.php/vet/article/view/7043/6499 https://creativecommons.org/licenses/by/2.5/ar/

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