Respostas fisiológicas e produtivas de vacas holandesas com acesso à sombra constante ou limitada
Material type: ArticleLanguage: Portuguese Description: 27(3):595-602Subject(s):- Dairy cows
- Animal performance
- Milk
- Production data
- Livestock management
- Shade
- Environmental factors
- Dry matter content
- Environmental temperature
- Body temperature
- Brazil
- Vacas lecheras
- Desempeño animal
- Leche
- Datos de producción
- Manejo del ganado
- Sombra
- Factores ambientales
- Contenido de materia seca
- Temperatura ambiental
- Temperatura del cuerpo
- Brasil
- Journal articles
- Artículos en revistas
- Ganadería
- Animal husbandry
- Journal article
Item type | Current library | Collection | Call number | Copy number | Status | Date due | Barcode | Item holds | |
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Journal Article | CIAT Library Journal Collection | Journal Collection | c.1 | Not For Loan (Restricted Access) |
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)