Production aspect of photoperiodism in dairy cattle
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Date
2015-04
Journal Title
Journal ISSN
Volume Title
Publisher
Excellent Publishers
Abstract
Photoperiod is defined as the virtual duration of light and dark that a cattle
experiences during a day. It is classified into Long day photoperiod (LDPP)
and short day photoperiod (SDPP). 16 18 hours of light and 6-8 hours of
dark exposure is considered as LDPP and vice versa for SDPP. Photoperiod is
primarily influenced by melatonin. The increased level of melatonin
concentration in the blood results in shift in the secretion of various
hormones. Calves raised under LDPP during the growth phase yields larger
and leaner body at maturity, with greater mammary parenchymal growth.
LDPP exposed lactating cattle produced higher milk yield due to its lower
melatonin concentration and higher prolactin concentration, whereas SDPP
during the dry period of multiparous cows enhances milk production in the
following lactation. These signify the importance of Photoperiodism in dairy
cattle for an optimized production.
Description
TNV_ijcrar_2015_3(4)118-125
Keywords
Veterinary Science