Thermal conditioned of freestall facilities resting area and its consequences on productive and physiological responses in dairy cows

Authors

  • Soraia Vanessa Matarazzo 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
  • Iran José Oliveira da Silva Universidade de São Paulo, Escola Superior de Agricultura Luiz de Queiroz, Departamento de Engenharia Rural, Piracicaba, SP
  • Maurício Perissinotto Universidade de São Paulo, Escola Superior de Agricultura Luiz de Queiroz, Departamento de Engenharia Rural, Piracicaba, SP
  • Daniella Jorge de Moura Universidade Estadual de Campinas, Faculdade de Engenharia Agrícola, Departamento de Construções Rurais, Campinas, SP
  • Sérgio Augusto de Albuquerque Fernandes Universidade Estadual do Sudoeste da Bahia, Departamento de Tecnologia Rural e Animal, Itapetinga, BA
  • Irineu Arcaro Júnior 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

Keywords:

evaporative cooling, heat stress, milk production, physiological parameters

Abstract

This work aimed to evaluate the efficiency of thermal conditioned in free-stall facilities and its consequences on productive and physiological responses in dairy cows. Experimental period was 28 consecutive days of November/2003. Fifteen dairy multiple cows with average milk production of 20kg/day were used. Treatments were: non-fan (NF); fan (F) and fan + misting (FM) directioned to animal bedding. Dry bulb temperature (DBT) and air relative humidity (RH) were measured every 15 minutes through a period of 24 hours inside and outside of facilities. Milking was realized at 1:00am; 9:00am and 5:00pm and date were collected. Animals were fed twice a day (10:00am and 3:00pm) and amounts of offered and rejected feed were daily registered. Physiological data such, as respiratory frequency (RF); rectal temperature (RT) and skin temperature (ST), were taken at 9:00am, 11:00am, 1:00pm, 3:00pm and 5:00pm. The RH was higher in V0 (61.8%) and VN (61.8%) treatments than in V (60.3%). The THI was higher in V (75.0) than in V0 (74.5) and VN (74.3) treatments. Related to physiological parameters, lactating cows of V0 treatment had lower rectal temperature at 11:00am (37.9ºC); 01:00pm (38.2ºC) and 05:00pm (38.2ºC). Respiratory frequencies (58; 55 e 58 mov/min, respectively, to V0; V e VN), white surface temperature (35.4ºC; 33.4ºC and 35.2ºC respectively, to V0; V and VN) and black surface temperature (31.9ºC; 31.5ºC and 31.8ºC, respectively, to V0, V and VN) were within normal variation in all treatments. Higher feed intakes were observed in animals of V0 (20.5kg DM/day) and V (21.3kg DM/day) treatments, but it did not increase milk production.

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Published

2007-03-22

Issue

Section

FORAGE CROPS AND PASTURES

How to Cite

Thermal conditioned of freestall facilities resting area and its consequences on productive and physiological responses in dairy cows. (2007). Bulletin of Animal Husbandry, 64(3), 221-232. http://bia.iz.sp.gov.br/index.php/bia/article/view/1235

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