Changes in the Production and Composition of Cow's Milk in Response to an Increase in Somatic Cells
A study was carried out in five herds from central and southern Chile in order to establish the effect of increasing somatic cell counts on the production and composition of milk. Information coming from a monthly control system for each of the animals belonging to the experimental dairy herds was m...
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| Veröffentlicht in: | Agricultura técnica 2003-01, Vol.60 (3) |
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| creator | Pedraza, Carlos G Mansilla, Alberto M Fajardo, Paola R Agüero, Hernán E |
| description | A study was carried out in five herds from central and southern Chile
in order to establish the effect of increasing somatic cell counts on
the production and composition of milk. Information coming from a
monthly control system for each of the animals belonging to the
experimental dairy herds was managed in a computer database designed
for said purpose. Starting from the records registered in two years of
data collection, the relations existing among the somatic cell count
and the production and composition of milk were studied. A general
adjustment model was established allowing an adequate explanation of
this phenomenon (y = a + bx + cx2 +, where a, b, and c are parameters;
y = Total Solids, % (ST); Butterfat, % (MG) and Non Fat Solids, %
(SNG); and x = level of mastitis (assessed in ranges 0 to 9)). The main
results were the following: a one unit increment in somatic cell count
represented a decrease in milk production of 0.760 and 0.790 kg d-1,
for range 1 vs. 0.530 and 0.810 (P |
| format | Article |
| fullrecord | <record><control><sourceid>bioline</sourceid><recordid>TN_cdi_bioline_primary_cria_bioline_at_at00022</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>cria_bioline_at_at00022</sourcerecordid><originalsourceid>FETCH-bioline_primary_cria_bioline_at_at000223</originalsourceid><addsrcrecordid>eNqVjssKwjAQRbNQsD7-YXauKqFadV8UXQii7kuMqY6mmZKJiH9vFP0AYWA4956BaYlEjqd5ms3lrCO6zFcps0mezROhi4tyZ8OADsLFwNbT6a4DkgPlTlBQ3RDjh6mK-BgybNDe3v7OcEOODQSKMqyd9kZFjNWeahVQQ2Gs5b5oV8qyGXx3T4yWi0OxSo9IFp0pG4-18s9Se1TlL1QhjoyPZuO_D15sLk6M</addsrcrecordid><sourcetype>Publisher</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype></control><display><type>article</type><title>Changes in the Production and Composition of Cow's Milk in Response to an Increase in Somatic Cells</title><source>EZB-FREE-00999 freely available EZB journals</source><creator>Pedraza, Carlos G ; Mansilla, Alberto M ; Fajardo, Paola R ; Agüero, Hernán E</creator><creatorcontrib>Pedraza, Carlos G ; Mansilla, Alberto M ; Fajardo, Paola R ; Agüero, Hernán E</creatorcontrib><description>A study was carried out in five herds from central and southern Chile
in order to establish the effect of increasing somatic cell counts on
the production and composition of milk. Information coming from a
monthly control system for each of the animals belonging to the
experimental dairy herds was managed in a computer database designed
for said purpose. Starting from the records registered in two years of
data collection, the relations existing among the somatic cell count
and the production and composition of milk were studied. A general
adjustment model was established allowing an adequate explanation of
this phenomenon (y = a + bx + cx2 +, where a, b, and c are parameters;
y = Total Solids, % (ST); Butterfat, % (MG) and Non Fat Solids, %
(SNG); and x = level of mastitis (assessed in ranges 0 to 9)). The main
results were the following: a one unit increment in somatic cell count
represented a decrease in milk production of 0.760 and 0.790 kg d-1,
for range 1 vs. 0.530 and 0.810 (P<0.05) for range 9, for heifers
and dairy cows respectively. The values found for the composition
parameters, in the same order, were as follows: 0.095 and 0.092 for
range 1 vs. 0.024 and 0.092 for range 9 for ST; 0.021 and 0.031 vs.
0.010 and 0.015 for MG; 0.068 and 0.065 vs. - 0.025 and 0.068 for SNG.
These results confirm that losses due to sub-clinical mastitis have an
important and detrimental effect on milk production and composition.
Se realizó un estudio en cinco lecherías de la Zona Central y
Sur de Chile, destinado a establecer el efecto de concentraciones
crecientes de células somáticas sobre la producción y
composición de leche de vacas. Se utilizó la información
proveniente de controles sistemáticos mensuales, de cada uno de
los animales pertenecientes a los rebaños experimentales, siendo
manejada en una base computacional específicamente diseñada
para dicho fin. A partir de los antecedentes registrados en dos
años de recopilación, se estudiaron las relaciones existentes
entre el recuento de células somáticas y la producción y
composición de la leche, lográndose establecer un modelo
general de ajuste (y = a + bx + cx2, donde a, b, c son parámetros,
y = Sólidos totales (ST), Materia Grasa (MG), Sólidos no
granos (SNG), x = score o rango de mastitis (0 a 9)), herramienta que
permite dar adecuada explicación al fenómeno. Los principales
resultados fueron: el incremento de una unidad en el recuento de
células representó en el volumen diario de producción de
leche, una tasa de disminución expresada en kg d-1 de 0,760 y
0,790 para el nivel o rango 1 vs 0,530 y 0,810 (P < 0,05) en el
rango 9, para vaquillas y vacas, respectivamente. En igual secuencia
los valores encontrados en los parámetros composicionales fueron:
0,095 y 0,092 en el rango 1 vs 0,024 y 0,092 en el rango 9 para ST;
0,021 y 0,031 vs 0,010 y 0,015 para MG; 0,068 y 0,065 vs 0,025 y 0,068
en SNG. Estos resultados permiten concluir que las pérdidas
registradas como consecuencia de la mastitis subclínica,
constituyen un importante factor detrimental de la producción y
composición de leche.</description><identifier>ISSN: 0365-2807</identifier><language>spa</language><publisher>Instituto de Investigaciones Agropecuarias, INIA</publisher><subject>calidad de leche, lechería, producción de leche ; milk quality, dairy herd, milk production</subject><ispartof>Agricultura técnica, 2003-01, Vol.60 (3)</ispartof><rights>Copyright 2000 - Instituto de Investigaciones Agropecuarias, INIA (Chile)</rights><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780</link.rule.ids></links><search><creatorcontrib>Pedraza, Carlos G</creatorcontrib><creatorcontrib>Mansilla, Alberto M</creatorcontrib><creatorcontrib>Fajardo, Paola R</creatorcontrib><creatorcontrib>Agüero, Hernán E</creatorcontrib><title>Changes in the Production and Composition of Cow's Milk in Response to an Increase in Somatic Cells</title><title>Agricultura técnica</title><description>A study was carried out in five herds from central and southern Chile
in order to establish the effect of increasing somatic cell counts on
the production and composition of milk. Information coming from a
monthly control system for each of the animals belonging to the
experimental dairy herds was managed in a computer database designed
for said purpose. Starting from the records registered in two years of
data collection, the relations existing among the somatic cell count
and the production and composition of milk were studied. A general
adjustment model was established allowing an adequate explanation of
this phenomenon (y = a + bx + cx2 +, where a, b, and c are parameters;
y = Total Solids, % (ST); Butterfat, % (MG) and Non Fat Solids, %
(SNG); and x = level of mastitis (assessed in ranges 0 to 9)). The main
results were the following: a one unit increment in somatic cell count
represented a decrease in milk production of 0.760 and 0.790 kg d-1,
for range 1 vs. 0.530 and 0.810 (P<0.05) for range 9, for heifers
and dairy cows respectively. The values found for the composition
parameters, in the same order, were as follows: 0.095 and 0.092 for
range 1 vs. 0.024 and 0.092 for range 9 for ST; 0.021 and 0.031 vs.
0.010 and 0.015 for MG; 0.068 and 0.065 vs. - 0.025 and 0.068 for SNG.
These results confirm that losses due to sub-clinical mastitis have an
important and detrimental effect on milk production and composition.
Se realizó un estudio en cinco lecherías de la Zona Central y
Sur de Chile, destinado a establecer el efecto de concentraciones
crecientes de células somáticas sobre la producción y
composición de leche de vacas. Se utilizó la información
proveniente de controles sistemáticos mensuales, de cada uno de
los animales pertenecientes a los rebaños experimentales, siendo
manejada en una base computacional específicamente diseñada
para dicho fin. A partir de los antecedentes registrados en dos
años de recopilación, se estudiaron las relaciones existentes
entre el recuento de células somáticas y la producción y
composición de la leche, lográndose establecer un modelo
general de ajuste (y = a + bx + cx2, donde a, b, c son parámetros,
y = Sólidos totales (ST), Materia Grasa (MG), Sólidos no
granos (SNG), x = score o rango de mastitis (0 a 9)), herramienta que
permite dar adecuada explicación al fenómeno. Los principales
resultados fueron: el incremento de una unidad en el recuento de
células representó en el volumen diario de producción de
leche, una tasa de disminución expresada en kg d-1 de 0,760 y
0,790 para el nivel o rango 1 vs 0,530 y 0,810 (P < 0,05) en el
rango 9, para vaquillas y vacas, respectivamente. En igual secuencia
los valores encontrados en los parámetros composicionales fueron:
0,095 y 0,092 en el rango 1 vs 0,024 y 0,092 en el rango 9 para ST;
0,021 y 0,031 vs 0,010 y 0,015 para MG; 0,068 y 0,065 vs 0,025 y 0,068
en SNG. Estos resultados permiten concluir que las pérdidas
registradas como consecuencia de la mastitis subclínica,
constituyen un importante factor detrimental de la producción y
composición de leche.</description><subject>calidad de leche, lechería, producción de leche</subject><subject>milk quality, dairy herd, milk production</subject><issn>0365-2807</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2003</creationdate><recordtype>article</recordtype><sourceid>RBI</sourceid><recordid>eNqVjssKwjAQRbNQsD7-YXauKqFadV8UXQii7kuMqY6mmZKJiH9vFP0AYWA4956BaYlEjqd5ms3lrCO6zFcps0mezROhi4tyZ8OADsLFwNbT6a4DkgPlTlBQ3RDjh6mK-BgybNDe3v7OcEOODQSKMqyd9kZFjNWeahVQQ2Gs5b5oV8qyGXx3T4yWi0OxSo9IFp0pG4-18s9Se1TlL1QhjoyPZuO_D15sLk6M</recordid><startdate>20030113</startdate><enddate>20030113</enddate><creator>Pedraza, Carlos G</creator><creator>Mansilla, Alberto M</creator><creator>Fajardo, Paola R</creator><creator>Agüero, Hernán E</creator><general>Instituto de Investigaciones Agropecuarias, INIA</general><scope>RBI</scope></search><sort><creationdate>20030113</creationdate><title>Changes in the Production and Composition of Cow's Milk in Response to an Increase in Somatic Cells</title><author>Pedraza, Carlos G ; Mansilla, Alberto M ; Fajardo, Paola R ; Agüero, Hernán E</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-bioline_primary_cria_bioline_at_at000223</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>spa</language><creationdate>2003</creationdate><topic>calidad de leche, lechería, producción de leche</topic><topic>milk quality, dairy herd, milk production</topic><toplevel>online_resources</toplevel><creatorcontrib>Pedraza, Carlos G</creatorcontrib><creatorcontrib>Mansilla, Alberto M</creatorcontrib><creatorcontrib>Fajardo, Paola R</creatorcontrib><creatorcontrib>Agüero, Hernán E</creatorcontrib><collection>Bioline International</collection><jtitle>Agricultura técnica</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Pedraza, Carlos G</au><au>Mansilla, Alberto M</au><au>Fajardo, Paola R</au><au>Agüero, Hernán E</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Changes in the Production and Composition of Cow's Milk in Response to an Increase in Somatic Cells</atitle><jtitle>Agricultura técnica</jtitle><date>2003-01-13</date><risdate>2003</risdate><volume>60</volume><issue>3</issue><issn>0365-2807</issn><abstract>A study was carried out in five herds from central and southern Chile
in order to establish the effect of increasing somatic cell counts on
the production and composition of milk. Information coming from a
monthly control system for each of the animals belonging to the
experimental dairy herds was managed in a computer database designed
for said purpose. Starting from the records registered in two years of
data collection, the relations existing among the somatic cell count
and the production and composition of milk were studied. A general
adjustment model was established allowing an adequate explanation of
this phenomenon (y = a + bx + cx2 +, where a, b, and c are parameters;
y = Total Solids, % (ST); Butterfat, % (MG) and Non Fat Solids, %
(SNG); and x = level of mastitis (assessed in ranges 0 to 9)). The main
results were the following: a one unit increment in somatic cell count
represented a decrease in milk production of 0.760 and 0.790 kg d-1,
for range 1 vs. 0.530 and 0.810 (P<0.05) for range 9, for heifers
and dairy cows respectively. The values found for the composition
parameters, in the same order, were as follows: 0.095 and 0.092 for
range 1 vs. 0.024 and 0.092 for range 9 for ST; 0.021 and 0.031 vs.
0.010 and 0.015 for MG; 0.068 and 0.065 vs. - 0.025 and 0.068 for SNG.
These results confirm that losses due to sub-clinical mastitis have an
important and detrimental effect on milk production and composition.
Se realizó un estudio en cinco lecherías de la Zona Central y
Sur de Chile, destinado a establecer el efecto de concentraciones
crecientes de células somáticas sobre la producción y
composición de leche de vacas. Se utilizó la información
proveniente de controles sistemáticos mensuales, de cada uno de
los animales pertenecientes a los rebaños experimentales, siendo
manejada en una base computacional específicamente diseñada
para dicho fin. A partir de los antecedentes registrados en dos
años de recopilación, se estudiaron las relaciones existentes
entre el recuento de células somáticas y la producción y
composición de la leche, lográndose establecer un modelo
general de ajuste (y = a + bx + cx2, donde a, b, c son parámetros,
y = Sólidos totales (ST), Materia Grasa (MG), Sólidos no
granos (SNG), x = score o rango de mastitis (0 a 9)), herramienta que
permite dar adecuada explicación al fenómeno. Los principales
resultados fueron: el incremento de una unidad en el recuento de
células representó en el volumen diario de producción de
leche, una tasa de disminución expresada en kg d-1 de 0,760 y
0,790 para el nivel o rango 1 vs 0,530 y 0,810 (P < 0,05) en el
rango 9, para vaquillas y vacas, respectivamente. En igual secuencia
los valores encontrados en los parámetros composicionales fueron:
0,095 y 0,092 en el rango 1 vs 0,024 y 0,092 en el rango 9 para ST;
0,021 y 0,031 vs 0,010 y 0,015 para MG; 0,068 y 0,065 vs 0,025 y 0,068
en SNG. Estos resultados permiten concluir que las pérdidas
registradas como consecuencia de la mastitis subclínica,
constituyen un importante factor detrimental de la producción y
composición de leche.</abstract><pub>Instituto de Investigaciones Agropecuarias, INIA</pub></addata></record> |
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| identifier | ISSN: 0365-2807 |
| ispartof | Agricultura técnica, 2003-01, Vol.60 (3) |
| issn | 0365-2807 |
| language | spa |
| recordid | cdi_bioline_primary_cria_bioline_at_at00022 |
| source | EZB-FREE-00999 freely available EZB journals |
| subjects | calidad de leche, lechería, producción de leche milk quality, dairy herd, milk production |
| title | Changes in the Production and Composition of Cow's Milk in Response to an Increase in Somatic Cells |
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