Author:
Bal Mehmet A,Penner Greg B,Oba Masahito,Kennedy Alma D
Abstract
The objective of this study was to evaluate the effects of night-time light intensity on lactation performance and hormonal profiles in lactating dairy cattle. Twenty-four multiparous lactating dairy cows were exposed to light intensities of 0 to 5 lx (CONTROL) and 40 to 60 lx (DIM-LIGHT) from 1800 to 0400 in a cross-over design with 28-d periods. Contrary to the pre-trial hypothesis, melatonin release was not suppressed by DIM-LIGHT at night, and treatment effects on milk and milk component yields were not detected. Key words: Dim light, melatonin, milk production
Publisher
Canadian Science Publishing
Subject
Animal Science and Zoology,Food Animals
Cited by
5 articles.
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