Effect of lipid source on fatty acid profile in the rumen of cattle fed a tropical hay

Costa, D. F. A., Isherwood, P., Quigley, S. P., McLennan, S. R., De Souza, J., Gibbs, J., Sun, X. Q. and Poppi, D. P. (2013). Effect of lipid source on fatty acid profile in the rumen of cattle fed a tropical hay. In: 2013 Annual Meeting Abstracts: American Dairy Science Association®, American Society of Animal Science. JAM 2013: Joint ADSA-ASAS Annual Meeting, Indianapolis, IN, U.S.A., (667-667). 8-12 July, 2013.

Author Costa, D. F. A.
Isherwood, P.
Quigley, S. P.
McLennan, S. R.
De Souza, J.
Gibbs, J.
Sun, X. Q.
Poppi, D. P.
Title of paper Effect of lipid source on fatty acid profile in the rumen of cattle fed a tropical hay
Conference name JAM 2013: Joint ADSA-ASAS Annual Meeting
Conference location Indianapolis, IN, U.S.A.
Conference dates 8-12 July, 2013
Convener American Dairy Science Association (ADSA); American Society of Animal Science (ASAS)
Proceedings title 2013 Annual Meeting Abstracts: American Dairy Science Association┬«, American Society of Animal Science   Check publisher's open access policy
Journal name Journal of Animal Science   Check publisher's open access policy
Place of Publication Savoy, IL, United States
Publisher American Society of Animal Science
Publication Year 2013
Sub-type Published abstract
Open Access Status
ISSN 0021-8812
1525-3163
Volume 91
Issue E-Supp. 2
Start page 667
End page 667
Total pages 1
Language eng
Formatted Abstract/Summary
The objective of this study was to examine the fatty acid (FA) profile in the rumen fluid (RF) of steers fed a low crude protein tropical grass (Chloris gayana hay, 38g CP, 17g crude lipid and 752g NDF kg DM−1) supplemented with various lipids. Five rumen cannulated steers (799 ± 15kg LW) were allocated to a 5 × 5 Latin square design. Hay ad libitum intake was determined over 7d and fixed at this level. The treatments were Control, hay only, or the addition of 3g kg hay DM−1 of lipid sources: Coconut (high lauric acid), cottonseed and soybean (high linoleic acid) or fish oil (high long chain FA (LCFA)). The experiment consisted of 5 runs of 18d feeding followed by 3d collection. Retention time (RT) was estimated on d 19 using CrEDTA. FA profile of RF collected at 0, 4, 8, 12 and 16h was determined by gas chromatography. Statistical analyses were done on proc GLM and LSD test for multiple comparisons. RT decreased with addition of soybean oil (14h) but no differences between other treatments (mean 17h). Coconut oil increased lauric and myristic acids in RF. No changes in total saturated FA (TSFA) in RF, with exception of a lower concentration for fish oil treatment. Addition of fish oil also decreased the concentration in RF of stearic and linolenic acid, but no differences to coconut and cottonseed treatments for linolenic acid. Fish oil also resulted in higher LCFA, linoleic and total unsaturated FA (TUFA), but no differences to soybean oil for the latter 2 acids. CLA was only different in RF between cottonseed and fish oil treatments. Differences in FA profile of oils were only partially translated into the FA profile in RF of steers fed a tropical hay.
Keyword C4 grass
Fatty acid
Rumen fluid
Q-Index Code EX
Q-Index Status Provisional Code
Institutional Status UQ
Additional Notes This volume also published as Journal of Dairy Science 96(E-Supp. 1) (0022-0302; 1525-3198).

Document type: Conference Paper
Collection: School of Agriculture and Food Sciences
 
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Created: Tue, 18 Feb 2014, 17:23:21 EST by Dr Simon Quigley on behalf of School of Agriculture and Food Sciences