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The fasting metabolism by non-pregnant dry dairy cows offered forage diets ad libitum prior to starvation

Published online by Cambridge University Press:  05 November 2021

T. Yan ,
F. J. Gordon ,
C. P. Ferris ,
R. E. Agnew ,
M. G. Porter  and
D. C. Patterson
T. Yan
Affiliation:
The Agricultural Research Institute of Northern Ireland, Hillsborough, Co Down BT26 6DR, UK
F. J. Gordon
Affiliation:
The Agricultural Research Institute of Northern Ireland, Hillsborough, Co Down BT26 6DR, UK
C. P. Ferris
Affiliation:
The Agricultural Research Institute of Northern Ireland, Hillsborough, Co Down BT26 6DR, UK
R. E. Agnew
Affiliation:
The Agricultural Research Institute of Northern Ireland, Hillsborough, Co Down BT26 6DR, UK
M. G. Porter
Affiliation:
The Agricultural Research Institute of Northern Ireland, Hillsborough, Co Down BT26 6DR, UK
D. C. Patterson
Affiliation:
The Agricultural Research Institute of Northern Ireland, Hillsborough, Co Down BT26 6DR, UK
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Extract

In classical studies estimates of maintenance energy requirements for cattle have been derived from measurements of fasting heat production (FHP) and urinary energy output following a period of restricted nutrition. Using 8 such sets of data, ARC (1980) developed equations to calculate the metabolisable energy (ME) requirement for maintenance (MEm) for lactating dairy cattle. This approach was further supported by AFRC (1990). However, recent studies using regression techniques at this Institute would suggest that the MEm for lactating dairy cows with access ad libitum to high forage diets is considerably higher than that calculated from AFRC (1990). The objective of the present study was therefore to measure the FHP of dairy cows offered forage diets ad libitum prior to fasting and to establish if this would support the higher MEm for dairy cows obtained using regression techniques .

Type
Programme
Information
Proceedings of the British Society of Animal Science , Volume 1997 , 1997 , pp. 117
Copyright
Copyright © British Society of Animal Science 1997

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References

AFRC. 1990. Technical Committee on Responses to Nutrients, Report Number 5, Nutritive Requirements of Ruminant Animals: Energy. Nutrition Abstracts and Reviews (Series B) 60: 729–804.Google Scholar
ARC. 1980. The Nutrient Requirements of Ruminant Livestock, Technical Review. Farnham Royal, CAB.Google Scholar
Gordon, F. J., Porter, M. G., Mayne, C. S., Unsworth, E. F. and Kilpatrick, D. J. 1995. The effect of forage digestibility and type of concentrate on nutrient utilisation for lactating dairy cattle. Journal of Dairy Research 62: 15–27 CrossRefGoogle Scholar