Performance, carcass and ruminal fermentation characteristics of heifers fed concentrates differing in energy level and cereal type (corn vs. wheat)

Carrasco Barco, Coral and Carro Travieso, Maria Dolores and Fuentetaja, A. and Medel de la Torre, Pedro (2017). Performance, carcass and ruminal fermentation characteristics of heifers fed concentrates differing in energy level and cereal type (corn vs. wheat). "Spanish Journal of Agricultural Research", v. 14 (n. 5); pp. 1-14. ISSN 1695-971X. https://doi.org/10.5424/sjar/2017154-11230.

Description

Title: Performance, carcass and ruminal fermentation characteristics of heifers fed concentrates differing in energy level and cereal type (corn vs. wheat)
Author/s:
  • Carrasco Barco, Coral
  • Carro Travieso, Maria Dolores
  • Fuentetaja, A.
  • Medel de la Torre, Pedro
Item Type: Article
Título de Revista/Publicación: Spanish Journal of Agricultural Research
Date: July 2017
ISSN: 1695-971X
Volume: 14
Subjects:
Freetext Keywords: beef cattle; ruminal pH; volatile fatty acids; in vitro fermentation
Faculty: E.T.S. de Ingeniería Agronómica, Alimentaria y de Biosistemas (UPM)
Department: Otro
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

A total of 144 beef heifers (218 ± 26.4 kg body weight) were housed in 24 pens (6 animals each) and used in a 168-day feedlot study to evaluate the influence of cereal type and energy level on performance, carcass quality and ruminal fermentation. Four concentrates were formulated according to a 2×2 factorial arrangement of treatments, with two energy levels (1,452 vs. 1,700 kcal net energy/kg) and two main cereals (wheat vs. corn). Concentrate and straw were offered ad libitum. Concentrate intake and body weight were recorded on days 42, 84, 126 and 168. Ruminal fluid was obtained by ruminocentesis from 3 heifers per pen on days 1, 84 and 168; and carcass weight, classification and yield, were determined in the same animals. Heifers fed high-energy diets had lower intake (6.97 vs. 7.29 kg fresh matter/d; p=0.011), and lower concentrate to gain ratio (5.15 vs. 5.66 kg/kg; p=0.002) than those fed low energy concentrates, and tended (p=0.069) to be heavier along the time. Neither carcass yield and classification, nor ruminal pH, volatile fatty acids nor NH3 -N concentrations were affected (p>0.050) by energy level. Total volatile fatty acids concentration tended (p=0.070) to be greater in heifers fed corn-based than wheat-based concentrates. No energy level x cereal type interactions were observed. These results indicate that high energy concentrates decreased feed intake and feed conversion but had minor effects on carcass performance. Cereal type had no effects on performance and ruminal fermentation and no interactions between cereal type and energy were detected.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainFIT060000200511UnspecifiedUnspecifiedUnspecified
Government of SpainIDI-20050617UnspecifiedUnspecifiedUnspecified

More information

Item ID: 50250
DC Identifier: http://oa.upm.es/50250/
OAI Identifier: oai:oa.upm.es:50250
DOI: 10.5424/sjar/2017154-11230
Official URL: http://revistas.inia.es/index.php/sjar/article/view/11230
Deposited by: Memoria Investigacion
Deposited on: 04 May 2018 08:42
Last Modified: 14 May 2019 12:42
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