Responses of young calves, on two levels of feeding, to transportation

被引:4
|
作者
Schrama, JW
Heetkamp, MJW
Verstegen, MWA
Schouten, WGP
vanderVeen, F
Helmond, FA
机构
[1] AGR UNIV WAGENINGEN,DEPT ANIM NUTR,WAGENINGEN INST ANIM SCI,NL-6700 AH WAGENINGEN,NETHERLANDS
[2] AGR UNIV WAGENINGEN,HUMAN & ANIM PHYSIOL DEPT,WAGENINGEN INST ANIM SCI,NL-6700 AH WAGENINGEN,NETHERLANDS
来源
ANIMAL SCIENCE | 1996年 / 63卷
关键词
calves; energy metabolism; hydrocortisone; stress; transport;
D O I
10.1017/S1357729800028319
中图分类号
S8 [畜牧、 动物医学、狩猎、蚕、蜂];
学科分类号
0905 ;
摘要
The effect of transportation on energy metabolism in young calves was assessed at two feeding levels by indirect calorimetry during 5.5-day experimental period. Twenty-six Holstein-Friesian male calves were assigned in a 2 X 2 factorial arrangement of treatments. Calves were fed below or near the maintenance requirements (270 or 420 kJ metabolizable energy per kg M(0.75) per day). At 5 days of age, 13 calves were transported. The applied transportation procedure was aimed to mimic common transport of young calves. The other 13 calves were controls. Metabolizability of dietary energy was low (0.808), but similar for control and transported calves. Despite the similar salivary cortisol concentrations after transportation, heat production was higher by 23 kJ/kg M(0.75) per day in transported than in control calves. Calves were not in a steady-state regarding their energy metabolism. Heat production decreased with time. Both transportation and feeding level influenced the decline in heat production with time. Both transportation and feeding level influenced the decline in heat production with time. Only during the first 3 days after transportation was heat production enhanced, suggesting a relatively short-term effect of transportation in young calves. The impact of transportation on heat production and time related alterations in heat production were not related to the calf's activity.
引用
收藏
页码:79 / 89
页数:11
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