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Science 24 February 1978:
Vol. 199. no. 4331, pp. 911 - 912
DOI: 10.1126/science.622576
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Articles

Science, Vol 199, Issue 4331, 911-912
Copyright © 1978 by American Association for the Advancement of Science

articles

Supplemental lighting stimulates growth and lactation in cattle

RR Peters, LT Chapin, KB Leining, and HA Tucker

Sixteen hours of light daily (114 to 207 lux) increased weight gains and milk yield 10 to 15% in Holstein cattle in comparison with cattle exposed to natural-length photoperiods (39 to 93 lux) of 9 to 12 hours. The weight gain was accomplished without increased consumption of feed. Manipulation of supplemental light may thus cause dramatic increases in food supplies from animals.


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Effect of photoperiod on hepatic growth hormone receptor 1A expression in steer calves.
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Controlled photoperiodic environments for food animals.
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