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SHORT COMMUNICATION
Effect of particle size of lucerne hay on chewing
activity, digestion and energy balance of Chinese
Holstein heifers
1
College of Animal Science and Technology, China Agriculture University,
Yuanmingyuan West Road 2, Beijing 100094, P.R. China
Publication date: 2007-09-17
Corresponding author
X. M. Zhang
College of Animal Science and Technology, China Agriculture University, Yuanmingyuan West Road 2, Beijing 100094, P.R. China
College of Animal Science and Technology, China Agriculture University, Yuanmingyuan West Road 2, Beijing 100094, P.R. China
J. Anim. Feed Sci. 2007;16(Suppl. 2):290-295
KEYWORDS
ABSTRACT
Three 8-month-old Chinese Holstein heifers weighing 300±22.4 kg were selected for a 3×3 Latin
square design to study the effects of chopped length of lucerne hay (2, 4 cm, and natural length) on
chewing activity and feed utilization efficiency. Results showed that increasing the chopped length
of lucerne hay increased eating bout, time spent for eating hay, concentrate and ration, ruminating
and total chewing activity. Digestibility was unaffected by the treatments. Decreasing chopped
length of lucerne hay decreased heat production and increased energy retained in body.
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| ISSN: | 1230-1388 |
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