Energy requirements for maintenance of crossbred beef cattle with different genetic potential for milk.

M. Montaño-Bermudez, M. K. Nielsen, G. H. Deutscher

Research output: Contribution to journalArticle

75 Citations (Scopus)

Abstract

Maintenance energy requirements were estimated in two gestation and one lactation feeding trials for three groups of cows. All cows in the second gestation trial completed the first gestation and lactation trials. The three groups were chosen to represent cattle similar in growth rate and mature size but different in amount of milk provided to their calves. The low (L) group included Hereford x Angus, the medium (M) group included Red Poll x Angus and the high (H) group included Milking Shorthorn x Angus cows. Cows were individually fed to maintain net body weight (minus gravid uterus for gestation) constant. Allowances were made in energy intake for gestation and lactation. Cow weights were adjusted to an average condition score in each trial. Daily maintenance requirements during gestation were 18% lower than those during lactation. The H and M cows required 12% more energy per unit metabolic weight than L cows to maintain body weight during both gestation and lactation. Differences in milk production explained 23% of the variation in maintenance requirements, suggesting that important differences exist beyond those associated with milk production potential. Repeatabilities of maintenance requirement measurements ranged from .44 to .64. Maintenance requirements for calves under feedlot conditions in the postweaning phase were estimated from data collected from 494 calves, half-sibs and offspring of the cows described previously. Energy requirements were 11% higher for the H and M groups than for the L group.

Original languageEnglish (US)
Pages (from-to)2279-2288
Number of pages10
JournalJournal of animal science
Volume68
Issue number8
DOIs
StatePublished - Aug 1990

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energy requirements
beef cattle
crossbreds
Milk
Maintenance
Lactation
cows
milk
Pregnancy
pregnancy
lactation
Angus
calves
Milking Shorthorn
milk production
Body Weight
Red Poll
Weights and Measures
body weight
Energy Intake

ASJC Scopus subject areas

  • Food Science
  • Animal Science and Zoology
  • Genetics

Cite this

Energy requirements for maintenance of crossbred beef cattle with different genetic potential for milk. / Montaño-Bermudez, M.; Nielsen, M. K.; Deutscher, G. H.

In: Journal of animal science, Vol. 68, No. 8, 08.1990, p. 2279-2288.

Research output: Contribution to journalArticle

Montaño-Bermudez, M. ; Nielsen, M. K. ; Deutscher, G. H. / Energy requirements for maintenance of crossbred beef cattle with different genetic potential for milk. In: Journal of animal science. 1990 ; Vol. 68, No. 8. pp. 2279-2288.
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