| Effects of diet type and metabolizable energy intake level on tympanic temperature of steers fed during summer and winter seasons. | |
| | |
MedLine Citation:
|
PMID: 21257781 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
|
A summer study and a winter study were conducted utilizing an incomplete factorial structure in a complete randomized design. Within season, factors studied were: 1) type of diet, which included 2 levels of metabolizable energy (ME) that were classified as either concentrate (3.04 Mcal ME•kg(-1)) or roughage (2.63 Mcal ME•kg(-1)) diets, and 2) daily ME intakes (MEI) of 11, 18, and 25 Mcal ME•d(-1) for the roughage diets and 18, 25, and 32 Mcal ME•d(-1) for the concentrate diets. In Exp. 1 (summer study), 30 steers (5 steers per treatment combination) were utilized to collect tympanic temperatures (TT). In Exp. 2 (winter study), 24 steers (4 steers per treatment combination) were utilized to collect TT. Mean TT was 0.3 °C greater for summer when compared with winter (38.9 vs. 38.6 ºC, respectively; P < 0.05). Steers fed diets based on concentrate tended to display greater TT than steers fed diets based on roughage. Season×diet×hour interactions were found for TT (P = 0.01). In the winter, greater TT (P < 0.05) were found from 0900 to 1400 when an equal amount of MEI was derived from a concentrate-based vs roughage-based diet. In cattle fed roughage-based diets during the summer TT = 38.63 + 0.0114·MEI, whereas for cattle fed concentrate-based diets, TT = 38.69 + 0.0114·MEI. During the winter, for cattle fed a roughage-based diet TT = 37.65 + 0.0856·MEI - 0.0018·MEI(2), whereas for cattle fed a concentrate-based diet, TT = 35.37 + 0.2635·MEI - 0.0051·MEI(2). In summary, results demonstrate that increases in the energy level of the diet result in increases in TT. However, the response is dependent on season of year with a linear response in TT for summer and a quadratic response during winter. |
| | |
Authors:
|
R A Arias; T L Mader; A M Parkhurst |
Publication Detail:
|
Type: JOURNAL ARTICLE Date: 2011-1-21 |
Journal Detail:
|
Title: Journal of animal science Volume: - ISSN: 1525-3163 ISO Abbreviation: - Publication Date: 2011 Jan |
Date Detail:
|
Created Date: 2011-1-24 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 8003002 Medline TA: J Anim Sci Country: - |
Other Details:
|
Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
|
Escuela de Agronomía, Facultad de Recursos Naturales, Universidad Católica de Temuco, Temuco 4781172, Chile. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Coup d'Etat: an orphan takes control.
Next Document: Usefulness of molecular-based methods for estimating effective population size in livestock assessed...