Effects of Lactation and Prenatal Androgenization on the Performance, Carcass Composition, and Longissimus Muscle Sensory Characteristics of Heifers in the Single-Calf Heifer System

G. N. Hermesmeyer, L. L. Berger, Dan B Faulkner, D. J. Kesler, T. G. Nash, D. M. Schaefer

Research output: Contribution to journalArticle

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Abstract

Two experiments were conducted to evaluate feedlot performance, lactational characteristics, and carcass composition and quality of heifers and the performance of their calves in a single-calf heifer (SCH) system. In Exp. 1, 13 [10 lactating (L) and 3 nonlactating (NL)] prenatally androgenized (PA) heifers, born to cows implanted with testosterone propionate (TP) and 19 (13 L and 6 NL) control (C) heifers, born to nonimplanted cows, were used. Heifers were calved and the pairs were placed in feedlot pens to evaluate the effects of PA on feedlot performance and lactation. Heifers were fed an 85% concentrate diet and fed to a compositional endpoint of 1.1 cm of subcutaneous fat cover, at which point calves were weaned and heifers slaughtered approximately 12 h later. The NL heifers consumed 17.0% less (P

Original languageEnglish (US)
Pages (from-to)14-23
Number of pages10
JournalProfessional Animal Scientist
Volume15
Issue number1
DOIs
StatePublished - Mar 1 1999
Externally publishedYes

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Keywords

  • Androgens
  • Heifers
  • Lactation
  • Prenatal Period

ASJC Scopus subject areas

  • Animal Science and Zoology
  • Food Science

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