- Volume 16 Issue 7
DOI QR Code
Functional Characterization of Mammary Gland of Holstein Cows under Humid Tropical Summer Climates
- Lu, C.H. ;
- Chang, C.J. ;
- Lee, P.N. ;
- Wu, C.P. ;
- Chen, M.T. ;
- Zhao, X.
- Received : 2002.09.26
- Accepted : 2003.04.04
- Published : 2003.07.01
Physiological parameters were measured on six primiparous, non-pregnant Holstein cows prior to peak lactation over a 3-month summer season in southwestern Taiwan. The objectives were to characterize heat stress-induced change in functionality of mammary gland under natural climates of tropical summer and to establish physiological indices applicable to this environment in referring to this change. Environmental and physiological readings, milk and blood samples were taken at 15:00 h biweekly for totally five time points during the study. Climate readings showed that the afternoon humidex value reached the highest (53.5) around mid summer. Rectal temperature of cows taken simultaneously varied between
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