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 feeding history on milk production and plasma IGF-1 level in indigenous Ethiopian and crossbred cows

A. Jenet 1, 2,  
M. Kreuzer 2  ,  
W. Langhans 3,  
D. Werling 3,  
 
1
International Livestock Research Institute (ILRI), P.O. Box 5689, Addis Ababa, Ethiopia, Institute of Animal Science, Federal Institute of Technology (ETH) ETH-Centre/LFW
2
Animal Nutrition, CH-8092 Zurich, Switzerland
3
Physiology and Animal Husbandry CH-8092 Zurich, Switzerland
J. Anim. Feed Sci. 2004;13(Suppl. 1):495–498
Publish date: 2004-08-30
KEYWORDS:
ABSTRACT:
Seasonal fluctuations in feed supply often result in serious under-nutrition of dairy cattle. We investigated the effects of impairments and improvements of feeding levels on milk production, weight changes, and the plasma level of IGF-1 in the third lactation of 27 Boran (Bos indicus) and Holstein-Boran crossbred cows. Results showed that Boran cows responded to changes in feed supply with weight changes and crossbreds predominantly with changes in milk yield. Milk yield was generally higher in crossbred cows; however, cows previously well fed showed higher milk production levels. IGF-1 was highest in Boran cows. Also crossbreds, well fed after previous undernutrition, showed high plasma levels of IGF-1, suggesting that these cows replenish first their body reserves at the expenses of milk production.
CORRESPONDING AUTHOR:
M. Kreuzer   
Animal Nutrition, CH-8092 Zurich, Switzerland
ISSN:1230-1388