The physiological responses of dairy cattle during exposure to environmental temperature

Idris, Azahar (1981) The physiological responses of dairy cattle during exposure to environmental temperature. [Project Paper] (Submitted)

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Abstract

Eight three year old dairy cows consisting of four Friesians and four Friesian X Local Indian Dairy cattle were placed under shade and exposed to direct solar radiation, one week tor each treatment. The effects lot heat stress on the cardiorespiratory activities, rectal and skin temperatures, hematological parameters and milk production were observed. As ambient temperature increased both breeds showed significant elevations in respiratory rate, rectal temperature pulse rate and skin temperatures. The increments were more pronounced when the animals were exposed to direct solar radiation. Total daily milk production decreased significantly when both breeds were exposed to direct solar radiation. During exposure to direct solar radiation, the crossbreds showed significant reductions in the erythrocyte count, hemoglobin level and the packed cell volume. Blood pH of both breeds increased significantly with the increase in ambient temperature, and generally the values were significantly higher for the purebreds.

Item Type:	Project Paper
Subjects:	S Agriculture > SF Animal culture
Faculty:	Faculty of Veterinary Medicine
Depositing User:	Ms Nurhaznita Mahmood
Date Deposited:	17 Oct 2025 02:24
Last Modified:	17 Oct 2025 03:01
URI:	http://psaspb.upm.edu.my/id/eprint/2453

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