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The effects of underfeeding during pregnancy and lactation on structure and chemistry of bovine liver and muscle

Published online by Cambridge University Press:  27 March 2009

I. M. Reid ,
C. J. Roberts  and
G. D. Baird
I. M. Reid
Affiliation:
Agricultural Research Council Institute for Research on Animal DiseasesComptonNr. Newbury, Berkshire, RG16 ONN
C. J. Roberts
Affiliation:
Agricultural Research Council Institute for Research on Animal DiseasesComptonNr. Newbury, Berkshire, RG16 ONN
G. D. Baird
Affiliation:
Agricultural Research Council Institute for Research on Animal DiseasesComptonNr. Newbury, Berkshire, RG16 ONN
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Summary

An experiment was carried out to study the effects of underfeeding during late pregnancy and early lactation on the structure and chemistry of liver and muscle of dairy cows. Two groups of cattle were fed at 60 and 40% of estimated requirements for maintenance and pregnancy or lactation for 13 weeks before and 13 weeks after calving, and one group was fed at maintenance level only for the same period. A control group was fed at 100% of estimated requirements for the same period. All groups were subsequently fed at the control level for a further 24 weeks.

Underfeeding resulted in significant changes in muscle and liver of dairy cows. In particular, there was a decrease in liver cell volume in the underfed groups and a persistence of post-parturient fat in the moderately underfed cows. Muscle fibre diameter was reduced and there was a loss of fast twitch oxidative glycolytic fibres in the underfed cows.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 94 , Issue 1 , February 1980 , pp. 239 - 245
Copyright
Copyright © Cambridge University Press 1980

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