African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6666

Full Length Research Paper

Influence of lactation stage, delivery order of calving and genetic group on milk quality

Ruthele Moraes do Carmo
  • Ruthele Moraes do Carmo
  • Instituto Federal de Educação, Ciência e Tecnologia Goiano, Câmpus Rio Verde, Caixa Postal 66, 75.901-970 - Rio Verde - GO, Brazil.
  • Google Scholar
Marco Antônio Pereira da Silva
  • Marco Antônio Pereira da Silva
  • Instituto Federal de Educação, Ciência e Tecnologia Goiano, Câmpus Rio Verde, Caixa Postal 66, 75.901-970 - Rio Verde - GO, Brazil.
  • Google Scholar
Gustavo Machado Pereira
  • Gustavo Machado Pereira
  • Instituto Federal de Educação, Ciência e Tecnologia Goiano, Câmpus Rio Verde, Caixa Postal 66, 75.901-970 - Rio Verde - GO, Brazil.
  • Google Scholar
Guilherme Henrique de Paula
  • Guilherme Henrique de Paula
  • Instituto Federal de Educação, Ciência e Tecnologia Goiano, Câmpus Rio Verde, Caixa Postal 66, 75.901-970 - Rio Verde - GO, Brazil.
  • Google Scholar
Thiago Vilela Abdelnoor Marques
  • Thiago Vilela Abdelnoor Marques
  • Instituto Federal de Educação, Ciência e Tecnologia Goiano, Câmpus Rio Verde, Caixa Postal 66, 75.901-970 - Rio Verde - GO, Brazil.
  • Google Scholar
Letícia Aparecida de Morais
  • Letícia Aparecida de Morais
  • Instituto Federal de Educação, Ciência e Tecnologia Goiano, Câmpus Rio Verde, Caixa Postal 66, 75.901-970 - Rio Verde - GO, Brazil.
  • Google Scholar
Vanessa Souza Silva
  • Vanessa Souza Silva
  • Instituto Federal de Educação, Ciência e Tecnologia Goiano, Câmpus Rio Verde, Caixa Postal 66, 75.901-970 - Rio Verde - GO, Brazil.
  • Google Scholar
Edmar Soares Nicolau
  • Edmar Soares Nicolau
  • Instituto Federal de Educação, Ciência e Tecnologia Goiano, Câmpus Rio Verde, Caixa Postal 66, 75.901-970 - Rio Verde - GO, Brazil.
  • Google Scholar
Rodrigo Balduíno Soares Neves
  • Rodrigo Balduíno Soares Neves
  • Instituto Federal de Educação, Ciência e Tecnologia Goiano, Câmpus Rio Verde, Caixa Postal 66, 75.901-970 - Rio Verde - GO, Brazil.
  • Google Scholar
Moacir Evandro Lage
  • Moacir Evandro Lage
  • Instituto Federal de Educação, Ciência e Tecnologia Goiano, Câmpus Rio Verde, Caixa Postal 66, 75.901-970 - Rio Verde - GO, Brazil.
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  •  Received: 09 April 2015
  •  Accepted: 19 May 2015
  •  Published: 10 December 2015

Abstract

Milk production and quality are influenced by environmental factors such as nutrition, genetic factors such as breed and physiological. The aim of the present study was to evaluate the influence of lactation stage, delivery order and genetic group on the quality of milk from crossbred cows 3/4 Gyr, 7/8 Gyr and 15/16 Gyr. Fresh milk samples were collected from crossbred cows. Fat, protein, lactose, non fat dry extract (NDE) and somatic cell count (SCC) of milk according to lactation stage, delivery order of calving and genetic groups were evaluated. The experimental design was completely randomized. Tukey test at 5% probability was used. Animals at the final third of lactation (201 to 305 days) showed higher fat, protein, NDE and SCC levels when compared to animals of other lactation stages. First delivery animals produced milk with higher content of solids compared to animals with 2 deliveries and above three deliveries. First calving the animals produced milk with higher solids content compared to animals with two calving and above three calving. Fat, protein and NDE results of fresh milk were consistent with limits established by the Brazilian legislation for milk quality, regardless of lactation stage, delivery order of calving and genetic group. Milk SCC was higher in cows in advanced lactation stage, The results were however below limits required by law. 3/4 crossbred Gyr cows showed higher SCC, with average values ​​above limit established by current legislation.

Key words: Somatic cell count (SCC), fat, non fat dry extract (NDE), fresh milk.