Diurnal temperature patterns of early lactating cows with milking parlor cooling

Ten cows in early stages of lactation (less than 100 days postpartum) were used to test the effect of sprinkler/fan cooling on vaginal temperature patterns. Cows were assigned to two groups matched according to milk production. The trial was divided into three periods: period 1, when one group was t...

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Bibliographic Details
Published in:Journal of dairy science 1985-06, Vol.68 (6), p.1496-1501
Main Authors: Araki, C.T, Nakamura, R.M, Kam, L.W.G, Clarke, N.L
Format: Article
Language:English
Subjects:
Air Conditioning - methods
Animals
BODY TEMPERATURE
BOVIN LAITIER
Cattle - physiology
Circadian Rhythm
COOLING
COWS
DAIRY CATTLE
DATE (DE L'EVENEMENT)
ENFRIAMIENTO
EPOCA
Female
GANADO DE LECHE
Housing, Animal
Lactation
MILKING
MILKING PARLOURS
ORDENO
Pregnancy
REFROIDISSEMENT
SALAS DE ORDENO
SALLE DE TRAITE
TEMPERATURA DEL CUERPO
Temperature
TEMPERATURE CORPORELLE
TIMING
TRAITE
VACA
VACHE
Vagina
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Summary:Ten cows in early stages of lactation (less than 100 days postpartum) were used to test the effect of sprinkler/fan cooling on vaginal temperature patterns. Cows were assigned to two groups matched according to milk production. The trial was divided into three periods: period 1, when one group was treated and the other group was not, period 2, when neither group was treated, and period 3, when treatment was switched from period 1 between groups. Treatment consisted of forced air misting in a premilking holding pen, fan cooling during milking, and forced air-sprinkling in a postmilking holding area. Weather conditions were measured by dry bulb, wet bulb, and black globe temperatures. Black globe temperatures in pre- and postmilking holding areas were used to estimate treatment magnitude. All measures were obtained through radiotelemetry at 15-min intervals for 31 days. Animals were milked twice a day. Animals spent an average of 140 min in treatment at each milking. In both morning and afternoon milking, treatment caused a transient increase of body temperature. However, this was followed in the afternoon by low vaginal temperatures for 1 to 2 h beyond treatment with lower temperatures throughout the day.
ISSN:0022-0302
1525-3198
DOI:10.3168/jds.S0022-0302(85)80988-7