Effects of Lactation and Prenatal Androgenization on the Performance, Carcass Composition, and Longissimus Muscle Sensory Characteristics of Heifers in the Single-Calf Heifer System11This material is based upon work supported by the Cooperative State Research, Education and Extension Service, USDA, under Project No. 35-0316
| Autor: | T. G. Nash, D.J. Kesler, Larry L. Berger, G. Hartnell, Dan B Faulkner, G.N. Hermesmeyer, B. Harris, Daniel M. Schaefer, F.A. Martz |
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| Rok vydání: | 1999 |
| Předmět: |
Testosterone propionate
animal structures animal diseases Marbled meat Biology Feed conversion ratio Tenderness chemistry.chemical_compound Animal science medicine.anatomical_structure chemistry Lactation Feedlot medicine Animal Science and Zoology Dry matter medicine.symptom Carcass composition Food Science |
| Zdroj: | The Professional Animal Scientist. 15:14-23 |
| ISSN: | 1080-7446 |
| DOI: | 10.15232/s1080-7446(15)31717-4 |
| Popis: | 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 |
| Databáze: | OpenAIRE |
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