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Autor Rodrigo Álvez |
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Evaluación de inicio de pubertad en vaquillonas de Raza Holando en campo de recrìa en funciòn de sus variables biommètricas y sus sistemas de crìa / Rodrigo Álvez
Título : Evaluación de inicio de pubertad en vaquillonas de Raza Holando en campo de recrìa en funciòn de sus variables biommètricas y sus sistemas de crìa Tipo de documento: texto impreso Autores: Rodrigo Álvez, Autor ; Alejandro Apezteguía, Autor Editorial: Fca - Ude Fecha de publicación: 2021 Número de páginas: 63 p. Nota general: Tutores: Wenzel, Jorge; Mowszowicz, Mauro
Idioma : Español (spa) Idioma original : Español (spa) Palabras clave: Dairy Rearing Farm, heifer, puberty, rearing, breeding. Resumen: Dairy Rearing Farms (DRFs) are a tool to organize dairy production,
where producers send dry categories to off-site areas, so as to dedicate the
facilities area to productive categories. In DRFs animals remain from their
calfhood to their becoming heifers (seventh month of pregnancy) meeting
their nutritional, sanitary and reproductive needs. The aim of the present
work was to evaluate the age at the onset of puberty in Holstein heifers in
DRFs, by virtue of their height, weight and breeding systems. It took place in
Montes’ DRF, Canelones, which is under Milk Producers National
Association (Asociación Nacional de Productores de leche [ANPL])
management. The animals which were object of study were those Holstein
whose weight was inferior to 250 kg by the time they arrived at the DRF.
Data was gathered from nine producers (owners of the studied animals) in
order to differentiate their breeding system and relate them to the results.
Animals were periodically measured in weight and height (hip height) so as to
follow body’s characteristics evolution. Adhesive heat detection devices
(patches) were used to determine the onset of puberty and cyclicity.
Differences were found between some characteristics of the producers
breeding systems which had an influence on the age of puberty. Feeding
calves with a greater amount of milk in the milking period reduced the age at
puberty. Sending younger animals to DRFs resulted in the animal reaching
the puberty age earlier. It has been observed that the higher the animals
were at their arrival, the higher they were at puberty. The biometric variables
on arrival at the DRF bear relation to the breading system. Sending heavier
animals limits the possibilities and advantages the system offers. Within the
DRF, those animals with a greater daily weight gain reach puberty with a
greater weight. Deficiencies in the collection of data in dairy farms impinge
upon the capability for analyzing them, affecting their productive efficiency.
An easier access to DRFs’ information is necessary as well as a greater
number of studies about this modality.Evaluación de inicio de pubertad en vaquillonas de Raza Holando en campo de recrìa en funciòn de sus variables biommètricas y sus sistemas de crìa [texto impreso] / Rodrigo Álvez, Autor ; Alejandro Apezteguía, Autor . - Fca - Ude, 2021 . - 63 p.
Tutores: Wenzel, Jorge; Mowszowicz, Mauro
Idioma : Español (spa) Idioma original : Español (spa)
Palabras clave: Dairy Rearing Farm, heifer, puberty, rearing, breeding. Resumen: Dairy Rearing Farms (DRFs) are a tool to organize dairy production,
where producers send dry categories to off-site areas, so as to dedicate the
facilities area to productive categories. In DRFs animals remain from their
calfhood to their becoming heifers (seventh month of pregnancy) meeting
their nutritional, sanitary and reproductive needs. The aim of the present
work was to evaluate the age at the onset of puberty in Holstein heifers in
DRFs, by virtue of their height, weight and breeding systems. It took place in
Montes’ DRF, Canelones, which is under Milk Producers National
Association (Asociación Nacional de Productores de leche [ANPL])
management. The animals which were object of study were those Holstein
whose weight was inferior to 250 kg by the time they arrived at the DRF.
Data was gathered from nine producers (owners of the studied animals) in
order to differentiate their breeding system and relate them to the results.
Animals were periodically measured in weight and height (hip height) so as to
follow body’s characteristics evolution. Adhesive heat detection devices
(patches) were used to determine the onset of puberty and cyclicity.
Differences were found between some characteristics of the producers
breeding systems which had an influence on the age of puberty. Feeding
calves with a greater amount of milk in the milking period reduced the age at
puberty. Sending younger animals to DRFs resulted in the animal reaching
the puberty age earlier. It has been observed that the higher the animals
were at their arrival, the higher they were at puberty. The biometric variables
on arrival at the DRF bear relation to the breading system. Sending heavier
animals limits the possibilities and advantages the system offers. Within the
DRF, those animals with a greater daily weight gain reach puberty with a
greater weight. Deficiencies in the collection of data in dairy farms impinge
upon the capability for analyzing them, affecting their productive efficiency.
An easier access to DRFs’ information is necessary as well as a greater
number of studies about this modality.Ejemplares
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