Effects climatization in holding pen on physiological parameters, milk production and composition in lactating cows

Authors

  • Irineu Arcaro Junior Secretaria de Agricultura e Abastecimento do Estado de São Paulo, Agência Paulista de Tecnologia dos Agronegócios, Instituto de Zootecnia, Centro Avançado de Pesquisa Tecnológica do Agronegócio de Bovinos de Leite, Nova Odessa, SP
  • Juliana Rodrigues Pozzi Arcaro Secretaria de Agricultura e Abastecimento do Estado de São Paulo, Agência Paulista de Tecnologia dos Agronegócios, Instituto de Zootecnia, Centro Avançado de Pesquisa Tecnológica do Agronegócio de Bovinos de Leite, Nova Odessa, SP
  • Cláudia Rodrigues Pozzi Secretaria de Agricultura e Abastecimento do Estado de São Paulo, Agência Paulista de Tecnologia dos Agronegócios, Instituto de Zootecnia, Centro Avançado de Pesquisa Tecnológica do Agronegócio de Bovinos de Leite, Nova Odessa, SP
  • Soraia Vanessa Matarazzo Universidade de São Paulo, Escola Superior de Agricultura Luiz de Queiroz, Piracicaba, SP
  • Helena Fagundes

Keywords:

heat stress, evaporative cooling, dairy cows

Abstract

The aim of this study was to evaluate the effects of climatization (ventilation and ventilation + sprinkler) inside a holding pen in a milking parlor on milk production and composition (fat, protein, lactose) and physiological parameters (rectal temperature and breathing rate). Fifteen lactating dairy cows, managed in open field, were allocated randomly into three treatments: holding pen without climatization (control); holding pen with ventilation (V) and holding pen with ventilation + sprinkler (VS). Milk production data were collected twice a day during the experimental period of 4 a days (7AM and 3PM). Milk samples were collected once a week to determine fat content; milk density and total milk solids. Breathing rate and rectal temperature of three animals from each treatment were measured everyday {before and after posing the treatments}. VS treatment reduced breathing rate of dairy cows. Treatments did not affeat by milk production and composition, suggesting that the 20 minutes in the holding pen with climatization may be insufficient to decrease heat stress.

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Published

2013-11-29

Issue

Section

FORAGE CROPS AND PASTURES

How to Cite

Effects climatization in holding pen on physiological parameters, milk production and composition in lactating cows. (2013). Bulletin of Animal Husbandry, 60(2), 173-177. http://bia.iz.sp.gov.br/index.php/bia/article/view/1347

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