PHYSIOLOGICAL RESPONSES AND ADAPTABILITY OF ¾ HOLSTEIN X ZEBU COWS TO SEMIARID CLIMATE

Authors

  • S. J. M. Moreira Universidade Estadual do Sudoeste da Bahia, Itapetinga, BA
  • C. C. S. Carvalho Universidade Estadual de Montes Claros, Janaúba, MG
  • L. V. Santos Universidade Estadual do Sudoeste da Bahia, Itapetinga, BA
  • J. R. M. Ruas Universidade Estadual do Sudoeste da Bahia, Itapetinga, BA
  • I. O. Andrade Júnior Universidade Estadual de Montes Claros, Janaúba, MG
  • A. L. O. Aiura Universidade Estadual de Montes Claros, Janaúba, MG
  • G. A. M. Gonçalves Universidade Estadual de Montes Claros, Janaúba, MG

DOI:

https://doi.org/10.17523/bia.v74n3p162

Keywords:

ambience, dairy cattle, family agriculture, genetic crossing.

Abstract

The northern region of Minas Gerais has limited milk production, mainly due to drought, however, this is the economic base of family agriculture that sustains the region. Thus, a study was carried out to evaluate the effect of the thermal environment on the physiological responses of Holstein-Zebu cows in the semi-arid region of Minas Gerais in order to verify the adaptability of these animals. The experiment was conducted in the summer and winter at the Bela Vista farm located in the Verdelândia city (MG), where 10 cows ¾ Holstein x Zebu (HxZ) were evaluated in each season. The thermal environment was characterized by means of daily measurements of air temperature, relative humidity, air temperature index and humidity and radiant thermal load. The physiological parameters: respiratory and heart rate, body surface temperature and rectal temperature, thickness, hair color and density, and hair length were measured before morning milking, as a function of the seasons of the year for 15 days. Climatic variables and indexes were higher in the summer and in the afternoon. The respiratory rate and the pelt thickness did not differ statistically, however the other variables were higher in the summer.

Downloads

Download data is not yet available.

Published

2017-11-01

Issue

Section

FORAGE CROPS AND PASTURES

How to Cite

PHYSIOLOGICAL RESPONSES AND ADAPTABILITY OF ¾ HOLSTEIN X ZEBU COWS TO SEMIARID CLIMATE. (2017). Bulletin of Animal Husbandry, 74(3), 162-168. https://doi.org/10.17523/bia.v74n3p162

Most read articles by the same author(s)

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 > >>