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A note on energy requirements for maintenance of lean and fat Angus, Hereford and Simmental cows

Published online by Cambridge University Press:  02 September 2010

C. L. Ferrell  and
T. G. Jenkins
C. L. Ferrell
Affiliation:
US Department of Agriculture†‡, Clay Center, Nebraska 68933, USA
T. G. Jenkins
Affiliation:
US Department of Agriculture†‡, Clay Center, Nebraska 68933, USA
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Abstract

Mature Angus (A), Hereford (H) and Simmental (S) cows (16 each) that had been randomly assigned and fed a maize silage-based diet at different levels of intake during lactation were selected.

Lean and fat A, H and S cows were fed the maize silage-based diet individually to provide metabolizable energy (ME) intakes of 542, 506; 476, 437; and 624, 597 kj/kg0.75 per day respectively for 84 days. Daily weight gains of lean cows were greater than those of fat cows (0·40 v. 0·11 kg/day) even though daily ME intakes were less (55·2 v. 62·4 MJ/day). Theoretical estimates of ME requirements for maintenance were less for lean than for fat cows, and maintenance of A and H cows tended to be less than those of S cows.

These results suggest that cow maintenance requirements increased in association with fatness that resulted from the previously imposed nutritional regimes and tended to differ among cow breeds.

Type
Research Article
Information
Animal Production , Volume 39 , Issue 2 , October 1984 , pp. 305 - 309
Copyright
Copyright © British Society of Animal Science 1984

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