0.857
IF5
0.900
IF
Q3
JCR
0.92
CiteScore
0.405
SJR
Q2
SJR
20
MNiSW
165.24
ICV
SHORT COMMUNICATION
 
CC-BY 4.0
 
 

Effect of particle size of lucerne hay on chewing activity, digestion and energy balance of Chinese Holstein heifers

Q. B. Kong 1,  
X. M. Zhang 1  ,  
F. Mo 1,  
S. L. Li 1,  
M. Ma 1
 
1
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
Publish date: 2007-09-17
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.
CORRESPONDING AUTHOR
X. M. Zhang   
College of Animal Science and Technology, China Agriculture University, Yuanmingyuan West Road 2, Beijing 100094, P.R. China
ISSN:1230-1388