Metabolizable energy utilisation in growing beef cattle: efficiencies of protein and fat synthesis

K. Hales, C. A. Old

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Ordinary least squares (OLS) estimates of efficiencies of metabolizable energy (ME) utilization are often inconsistent with thermodynamic favorabilities of underlying mechanisms. Efficiencies of ME utilization for maintenance (km), gain, protein and fat synthesis (kg, kp and kf, respectively) were evaluated for 152 growing beef steers in OLS (frequentist) and non-linear Bayesian frameworks. Estimators determined in OLS frameworks were not always consistent with thermodynamic favorabilities of underlying mechanisms and were characterized by inflated variances, the latter indicating poor model specification. When evaluated in Bayesian frameworks, maintenance was a variable function of ME intake and all estimators characterizing efficiencies of ME utilization were consistent with theoretical properties regarding maintenance and gain in growing and finishing beef cattle. USDA is an equal opportunity employer and provider

Original languageEnglish
Pages (from-to)481-482
Number of pages2
JournalEAAP Scientific Series
Volume138
DOIs
StatePublished - 2019

Keywords

  • beef cattle
  • efficiency
  • mathematical modeling

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