TY  - SER
AU  - Damasceno, Júlio Cesar
AU  - Baccari Júnior, Flávio
AU  - Targa, Luiz Antônio
TI  - Respostas fisiológicas e produtivas de vacas holandesas com acesso à sombra constante ou limitada
KW  - Dairy cows
KW  - Animal performance
KW  - Milk
KW  - Production data
KW  - Livestock management
KW  - Shade
KW  - Environmental factors
KW  - Dry matter content
KW  - Environmental temperature
KW  - Body temperature
KW  - Brazil
KW  - Vacas lecheras
KW  - Desempeño animal
KW  - Leche
KW  - Datos de producción
KW  - Manejo del ganado
KW  - Sombra
KW  - Factores ambientales
KW  - Contenido de materia seca
KW  - Temperatura ambiental
KW  - Temperatura del cuerpo
KW  - Brasil
KW  - Journal articles
KW  - Artículos en revistas
KW  - Ganadería
KW  - Animal husbandry
KW  - Journal article
N2  - The work was carried out to evaluate the physiologic and productive responses of 16 Holstein breed cows, in different lactating stages and production levels, maintained in two free stall corral types, With or without plastic sheet covering, in the southeast-northwest of the covered area edges. The animals were confined in free stall system, during the months of the summer, with access to the constant or limited shade. A complete randomized experimental design was used. The physiological variables measured were respiratory frequency (morning an afternoon) and rectal temperature (morning and afternoon). The productive variables were milk production (morning, afternoon and daily), dry matter (DM) intake (percent live weight) and efficiency of milk production (kg of milk/kg DM intake). The animals with access to the constant shade presented respiratory frequency (74.1 vs 8 1.0 breath/min.) and rectal temperature (39.5 vs 39.70C) lower and milk production (22.6 vs 20.9 kg/day) and efficiency of milk production (1.3 vs 1.2 kg of milk/kg DM ingested) higher than the animals with access to the limited shade. There was no effect on the dry matter intake. (RA)
UR  - http://www.revista.sbz.org.br/artigo/visualizar.php?artigo=1979
ER  -