Milk production of Holstein cows in small, medium and large size/Producao de leite de vacas da raca Holandesa de pequeno, medio e grande porte

The objective of this study was to evaluate the effect of the body size in milk production in the first, second and third lactations of Holstein cows. A total 133 cows were used, selected from a herd of 280 cows, classified as small, medium and large based on the body size composite (stature x 10 +...

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Bibliographic Details
Published in:Ciência rural 2011-03, Vol.41 (3), p.501
Main Authors: da Silva, Decio Adair Rebellatto, Olivo, Clair Jorge, de Campos, Ben-Hur Costa, Tejkowski, Thiago Moreira, Meinerz, Gilmar Roberto, Saccol, Ana Gabriela de Freitas, da Costa, Silvio Teixeira
Format: Article
Language:Spanish
Subjects:
Cattle industry
Dairy products industry
Milk production
Production data
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Summary:The objective of this study was to evaluate the effect of the body size in milk production in the first, second and third lactations of Holstein cows. A total 133 cows were used, selected from a herd of 280 cows, classified as small, medium and large based on the body size composite (stature x 10 + strength x 5 + depth x 3 + rump width x 2)/20. Data were collected from January 2007 to October 2009 in a commercial herd with intensive system of milk production, located in Salto Jacui, Rio Grande do Sul, Brazil. All cows were subjected to the same conditions of facilities management being used and milked three times a day. Data were obtained from the software Afimilk[R] --SAE AFIKIM. The experimental design was a completely randomized design with three treatments (body size). There was no interaction between milk production and body composite. Low correlation among body size composite and milk production was observed. Cows for medium and large size had similar on milk production superior (P
ISSN:0103-8478