Fatores fisiológicos e de meio sobre o intervalo de partos de vacas mestiças leiteiras do sistema de produção do CNPGL/Embrapa

Geraldo Noronha Junqueira Filho; Rui da Silva Verneque; Álvaro de Matos Lemos; Hamilton Carmélio Machado da Silva; Ronaldo Braga Reis

doi:10.1590/S1678-3921.pab1992.v27.3631

Physiological and environmental effects on calving intervals in milking crossbred cows of the production system at the CNPGL/Embrapa

Authors

Geraldo Noronha Junqueira Filho
Rui da Silva Verneque
Álvaro de Matos Lemos
Hamilton Carmélio Machado da Silva
Ronaldo Braga Reis

DOI:

https://doi.org/10.1590/S1678-3921.pab1992.v27.3631

Keywords:

friesian-indicus crosses, genetic groups

Abstract

This study was conducted with the data from 131 crossbred Holstein-Ze-bu-Gir (H-Z) cows in the Production System which was introduced in 1977 at the National Center of Research of Dairy Cattle (CNPGL/EMBRAPA), Coronel Pacheco, MG, Brazil. All informations were collected from individual zootechnical files, from 1977 to 1987. The effects of physiological and environmental factors on the calving intervals were studied. Cal-ving intervals averaged 406 ± 8 days (13.3 ± 0.3 months). For this variable the following factors showed significant effects: year of parturition, genetic groups (1/2 blood breed sho-wed longer intervals), calving order (decreasing intervals from first to third parity).

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Published

1992-01-01

Issue

v.27, n.1, jan. 1992

Section

ANIMAL SCIENCE

How to Cite

Filho, G. N. J., Verneque, R. da S., Lemos, Á. de M., da Silva, H. C. M., & Reis, R. B. (1992). Physiological and environmental effects on calving intervals in milking crossbred cows of the production system at the CNPGL/Embrapa. Pesquisa Agropecuaria Brasileira, 27(1), 163-170. https://doi.org/10.1590/S1678-3921.pab1992.v27.3631

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