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

Procedure for collecting milk sample and the number of milkings in relation to chemical composition and somatic cells of the fresh milk

Jakeline Fernandes Cabral
  • Jakeline Fernandes Cabral
  • Instituto Federal Goiano - Câmpus Rio Verde, Rodovia Sul Goiana, Km 01, P. O. Box 66, Zip Code 75901-970, Rio Verde, Goiás, Brazil.
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Marco Antônio Pereira da Silva
  • Marco Antônio Pereira da Silva
  • Instituto Federal Goiano - Câmpus Rio Verde, Rodovia Sul Goiana, Km 01, P. O. Box 66, Zip Code 75901-970, Rio Verde, Goiás, Brazil.
  • Google Scholar
Thiago Soares Carvalho
  • Thiago Soares Carvalho
  • Instituto Federal Goiano - Câmpus Rio Verde, Rodovia Sul Goiana, Km 01, P. O. Box 66, Zip Code 75901-970, Rio Verde, Goiás, Brazil.
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Rafaella Belchior Brasil
  • Rafaella Belchior Brasil
  • Instituto Federal Goiano - Câmpus Rio Verde, Rodovia Sul Goiana, Km 01, P. O. Box 66, Zip Code 75901-970, Rio Verde, Goiás, Brazil.
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Julliano Costa Garcia
  • Julliano Costa Garcia
  • Instituto Federal Goiano - Câmpus Rio Verde, Rodovia Sul Goiana, Km 01, P. O. Box 66, Zip Code 75901-970, Rio Verde, Goiás, Brazil.
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Rodrigo Balduíno Soares Neves
  • Rodrigo Balduíno Soares Neves
  • Centro de Pesquisa em Alimentos of Escola de Veterinária e Zootecnia of Universidade Federal de Goiás, Campus II da UFG, Rodovia GO-080 (Saída para Nova Veneza), Zip Code 749001-970, Goiânia, Goiás, Brazil.
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Edmar Soares Nicolau
  • Edmar Soares Nicolau
  • Centro de Pesquisa em Alimentos of Escola de Veterinária e Zootecnia of Universidade Federal de Goiás, Campus II da UFG, Rodovia GO-080 (Saída para Nova Veneza), Zip Code 749001-970, Goiânia, Goiás, Brazil.
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Moacir Evandro Lage
  • Moacir Evandro Lage
  • Centro de Pesquisa em Alimentos of Escola de Veterinária e Zootecnia of Universidade Federal de Goiás, Campus II da UFG, Rodovia GO-080 (Saída para Nova Veneza), Zip Code 749001-970, Goiânia, Goiás, Brazil.
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  •  Received: 20 September 2014
  •  Accepted: 10 September 2015
  •  Published: 10 December 2015

Abstract

This study was carried out to determine which system of milkings and sampling methodology presenting chemical composition results safer and lower variation of the results. In Properties I and II, the fresh milk samples were collected in 40 ml flasks containing bronopol in order to compare the chemical composition of the milk, as adopting two sample collection methods, that is two and three milkings. In order to compare the chemical composition of milk and SCC, between two sampling methodologies, in two daily milkings (Property I) and three daily milkings (Property II), fresh milk samples were collected randomly totaling 300 samples on the property I and 312 samples on the property II. The milk chemical components were determined through analytical principle that is based on differential absorption of infrared waves by components of the milk. By analyzing the treatments, experimental design was used entirely randomized and averages were compared by Tukey test using the statistical program SISVAR (statistical analysis system). When evaluating the data obtained through variation coefficient (VC), the occurrence of experimental was observed, since most results showed low variation. However the distinct procedures for sampling of the fresh milk may present varied levels of the chemical composition and SCC, therefore overestimating or underestimating the values of the milk composition, when samples are collected at different times of the day and different number of milkings.

 

Key words: Cows of high production, isolates samples, period, pool, sampling methodology.