African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6576

Full Length Research Paper

Thermal comfort estimation for dairy cows in the south of Goiás State, Brazil

Larissa Mendes Cruvinel
  • Larissa Mendes Cruvinel
  • Department of Animal Science, Instituto Federal Goiano, Morrinhos, Brazil.
  • Google Scholar
Larissa Christina de Paula
  • Larissa Christina de Paula
  • Department of Animal Science, Instituto Federal Goiano, Morrinhos, Brazil.
  • Google Scholar
Eliandra Maria Bianchini Oliveira
  • Eliandra Maria Bianchini Oliveira
  • Department of Animal Science, Instituto Federal Goiano, Morrinhos, Brazil.
  • Google Scholar
Tiago Neves Pereira Valente
  • Tiago Neves Pereira Valente
  • Department of Animal Science, Instituto Federal Goiano, Morrinhos, Brazil.
  • Google Scholar
Mateus Sobral de Araujo
  • Mateus Sobral de Araujo
  • Department of Animal Science, Instituto Federal Goiano, Morrinhos, Brazil.
  • Google Scholar
Jeferson Correa Ribeiro
  • Jeferson Correa Ribeiro
  • Department of Animal Science, Instituto Federal Goiano, Morrinhos, Brazil.
  • Google Scholar
Wallacy Barbacena Rosa dos Santos
  • Wallacy Barbacena Rosa dos Santos
  • Department of Animal Science, Instituto Federal Goiano, Morrinhos, Brazil.
  • Google Scholar


  •  Received: 16 April 2019
  •  Published: 04 June 2019

Abstract

The objective of this research was to analyze the correlation between climatic and milk composition variables. Thus, meteorological data and data on milk quality and composition (fat, protein, lactose, total solids content and defatted dry extract (DDE)) were used, as well as somatic cell count (SCC). The analysis was performed using the Pearson correlation test. After the study, it was verified that the temperature variations had a significant correlation with the fat, protein and total solids contents, as well as the temperature-humidity index (THI) also had correlation with lactose. In the analysis between the components, the correlations were between fat and protein, fat and total solids content, protein and total solids content, and lactose and fat. Moreover, SCC correlation with DDE and lactose were considered. The thermal comfort of dairy females has a direct influence on the quantity and quality of the final dairy product.

Key words: Dairy cattle, milk production, welfare.