Production systems, technical parameters and quality of bovine milk producers in southern Chile

Production systems, technical parameters and quality of bovine milk producers in southern Chile

Production information of 29 milk producers in the southern region of Chile was studied with the objective of characterizing and classifying different dairy production systems, evaluating various associations between quantitative and qualitative studied variables and analyzing the effect of the prod...

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Autor principal: Pérez,Jorge A
Lenguaje:English
Publicado: Pontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería Forestal 2011
Materias:
Cluster analysis
colony forming units
fat percentage
main components analysis
multivariable analysis
protein percentage
somatic cell
Acceso en línea:http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202011000100002
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spelling oai:scielo:S0718-162020110001000022011-08-18Production systems, technical parameters and quality of bovine milk producers in southern ChilePérez,Jorge A Cluster analysis colony forming units fat percentage main components analysis multivariable analysis protein percentage somatic cell Production information of 29 milk producers in the southern region of Chile was studied with the objective of characterizing and classifying different dairy production systems, evaluating various associations between quantitative and qualitative studied variables and analyzing the effect of the production system and the quality of bovine milk according to the month of the year that it was processed. The classification of production groups was based on the implementation of the exploratory multivariate technique, main components analysis and conglomerates or cluster analysis. The applied statistical model was: y ijk = µ + Mi + SPj + MSPij + e ijk, where y ijk=dependent variables (fat, protein, count of somatic cells and colony forming units); µ=general average; M=effect of i-th month; SPj=effect of j-th productive system; MSPi j=month-productive system interaction; e ijk=random residual effect. The price per liter of milk paid to producer was discarded for the construction of groups, since they presented a low discriminatory power given a coefficient of less than 20 % variation. Different correlations between analyzed variables are discussed. Five production systems are described using the qualifying variables and original systems. In general, more intensive production systems presented lower values of fat (%) and protein (%), but showed greater superiority in the quality of sanitary milk than dairy farms with minor animal load. Regarding seasonality, as winter turns to spring, protein (%) associated with a decrease in the fat (%) increases, which determines an inverse relationship between both variables.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería ForestalCiencia e investigación agraria v.38 n.1 20112011-04-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202011000100002en10.4067/S0718-16202011000100002
institution Scielo Chile
collection Scielo Chile
language English
topic Cluster analysis
colony forming units
fat percentage
main components analysis
multivariable analysis
protein percentage
somatic cell
spellingShingle Cluster analysis
colony forming units
fat percentage
main components analysis
multivariable analysis
protein percentage
somatic cell
Pérez,Jorge A
Production systems, technical parameters and quality of bovine milk producers in southern Chile
description Production information of 29 milk producers in the southern region of Chile was studied with the objective of characterizing and classifying different dairy production systems, evaluating various associations between quantitative and qualitative studied variables and analyzing the effect of the production system and the quality of bovine milk according to the month of the year that it was processed. The classification of production groups was based on the implementation of the exploratory multivariate technique, main components analysis and conglomerates or cluster analysis. The applied statistical model was: y ijk = µ + Mi + SPj + MSPij + e ijk, where y ijk=dependent variables (fat, protein, count of somatic cells and colony forming units); µ=general average; M=effect of i-th month; SPj=effect of j-th productive system; MSPi j=month-productive system interaction; e ijk=random residual effect. The price per liter of milk paid to producer was discarded for the construction of groups, since they presented a low discriminatory power given a coefficient of less than 20 % variation. Different correlations between analyzed variables are discussed. Five production systems are described using the qualifying variables and original systems. In general, more intensive production systems presented lower values of fat (%) and protein (%), but showed greater superiority in the quality of sanitary milk than dairy farms with minor animal load. Regarding seasonality, as winter turns to spring, protein (%) associated with a decrease in the fat (%) increases, which determines an inverse relationship between both variables.
author Pérez,Jorge A
author_facet Pérez,Jorge A
author_sort Pérez,Jorge A
title Production systems, technical parameters and quality of bovine milk producers in southern Chile
title_short Production systems, technical parameters and quality of bovine milk producers in southern Chile
title_full Production systems, technical parameters and quality of bovine milk producers in southern Chile
title_fullStr Production systems, technical parameters and quality of bovine milk producers in southern Chile
title_full_unstemmed Production systems, technical parameters and quality of bovine milk producers in southern Chile
title_sort production systems, technical parameters and quality of bovine milk producers in southern chile
publisher Pontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería Forestal
publishDate 2011
url http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202011000100002
work_keys_str_mv AT perezjorgea productionsystemstechnicalparametersandqualityofbovinemilkproducersinsouthernchile
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