Hostname: page-component-7bb8b95d7b-qxsvm Total loading time: 0 Render date: 2024-09-23T13:20:57.383Z Has data issue: false hasContentIssue false
  • English
  • Français

The use of regression techniques on calorimetric data to estimate the metabolisable energy requirements of lactating dairy cows

Published online by Cambridge University Press:  05 November 2021

T. Yan ,
F. J. Gordon ,
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
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
Get access

Extract

The metabolisable energy (ME) requirement for maintenance (MEm) can be determined by measuring the fasting metabolism of the non-lactating cow, but this approach cannot encompass any differences in maintenance metabolic rate between lactating and non-lactating animals. The MEm and efficiency of ME use for lactation (k1) can also be estimated by regression of energy outputs against ME intake (MEI). During 1992 to 1995, a total of 221 Holstein/Friesian lactating dairy cows, which were offered grass silage-based diets, were subjected to gaseous exchange measurements in indirect open-circuit respiration calorimeters. The objective of the present study was to use these data to predict the MEm and k1 by a range of regression techniques for lactating dairy cows offered grass silage-based diets.

Type
Programme
Information
Proceedings of the British Society of Animal Science , Volume 1997 , 1997 , pp. 4
Copyright
Copyright © British Society of Animal Science 1997

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

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
Gordon, F. J., Porter, M. G., Mayne, C. S., Unsworth, E. F. and Kilpatrick, D. J. 1995. Effect of forage digestibility and type of concentrate on nutrient utilisation for lactating dairy cattle. Journal of Dairy Research 62: 15–27.CrossRefGoogle Scholar