JDS
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

This Article
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Mackle, T. R.
Right arrow Articles by Bauman, D. E.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Mackle, T. R.
Right arrow Articles by Bauman, D. E.
J. Dairy Sci. 86:644-652
© American Dairy Science Association, 2003.

Effects of Abomasal Infusion of Conjugated Linoleic Acid on Milk Fat Concentration and Yield from Pasture-Fed Dairy Cows

T. R. Mackle*,1, J. K. Kay*, M. J. Auldist2, A. K. H. McGibbon{dagger}, B. A. Philpott{dagger}, L. H. Baumgard§ and D. E. Bauman{ddagger}

* Dexcel Ltd. Private Bag 3221, Hamilton, New Zealand
{dagger} New Zealand Dairy Research Institute, Private Bag 11 029, Palmerston North, New Zealand
{ddagger} Department of Animal Science, Cornell University, Ithaca, NY 14853-4801
§ Department of Animal Science, University of Arizona, Tucson, AZ

Corresponding author:
T. R. Mackle; e-mail:
tim.mackle{at}fonterra.com.

The aim of this study was to investigate the effects of conjugated linoleic acid supplementation on the synthesis of milk fat in pasture-fed Friesian cows. In four cows, a commercial mixture containing 62.3% (wt/vol) conjugated linoleic acid was infused intraabomasally to avoid rumen fermentation and biohydrogenation. The design was a 4 x 4 Latin square in which each cow received infusions of 0, 20, 40, and 80 g/d of conjugated linoleic acid mixture for 4 d. Cows were fed freshly cut ryegrass/white clover pasture ad libitum. Milk fat concentration was decreased by 36, 43, and 62% and milk fat yield was decreased by 32, 36, and 60% by the 20, 40, and 80 g of conjugated linoleic acid/d treatments. Dry matter intake, milk protein concentration, and protein yield were unaffected by treatments; however, milk yield was increased by 11% during the 40-g conjugated linoleic acid/d treatment. The effects of conjugated linoleic acid infusion were most pronounced in reducing de novo fatty acid synthesis and desaturation. Results show that the inhibitory effect of this conjugated linoleic acid mixture on milk fat synthesis occurs in pasture-fed cows, and demonstrate the potential to dramatically alter gross milk composition. This technology could offer a management tool to manipulate milk composition and energy demands of pasture-fed cows.

Key Words: conjugated linoleic acid • fat • milk • pasture

Abbreviation key: BOH = beta-hydroxybutyrate, CLA = conjugated linoleic acid, FAME = fatty acid methyl esters, NCN = noncasein nitrogen, TN = total nitrogen, TP = true protein, UN = urea nitrogen




This article has been cited by other articles:


Home page
 J DAIRY SCIHome page
F. Glasser, A. Ferlay, M. Doreau, P. Schmidely, D. Sauvant, and Y. Chilliard
Long-Chain Fatty Acid Metabolism in Dairy Cows: A Meta-Analysis of Milk Fatty Acid Yield in Relation to Duodenal Flows and De Novo Synthesis
J Dairy Sci, July 1, 2008; 91(7): 2771 - 2785.
[Abstract] [Full Text] [PDF]

Home page
 J. Nutr.Home page
D. E. Bauman, J. W. Perfield II, K. J. Harvatine, and L. H. Baumgard
Regulation of Fat Synthesis by Conjugated Linoleic Acid: Lactation and the Ruminant Model
J. Nutr., February 1, 2008; 138(2): 403 - 409.
[Abstract] [Full Text] [PDF]

Home page
 J DAIRY SCIHome page
E. Castaneda-Gutierrez, B. C. Benefield, M. J. de Veth, N. R. Santos, R. O. Gilbert, W. R. Butler, and D. E. Bauman
Evaluation of the Mechanism of Action of Conjugated Linoleic Acid Isomers on Reproduction in Dairy Cows
J Dairy Sci, September 1, 2007; 90(9): 4253 - 4264.
[Abstract] [Full Text] [PDF]

Home page
 J DAIRY SCIHome page
J. K. Kay, T. R. Mackle, D. E. Bauman, N. A. Thomson, and L. H. Baumgard
Effects of a Supplement Containing Trans-10, Cis-12 Conjugated Linoleic Acid on Bioenergetic and Milk Production Parameters in Grazing Dairy Cows Offered Ad Libitum or Restricted Pasture
J Dairy Sci, February 1, 2007; 90(2): 721 - 730.
[Abstract] [Full Text] [PDF]

Home page
 J DAIRY SCIHome page
L. J. Odens, R. Burgos, M. Innocenti, M. J. VanBaale, and L. H. Baumgard
Effects of Varying Doses of Supplemental Conjugated Linoleic Acid on Production and Energetic Variables During the Transition Period
J Dairy Sci, January 1, 2007; 90(1): 293 - 305.
[Abstract] [Full Text] [PDF]

Home page
 J DAIRY SCIHome page
M. J. de Veth, E. Castaneda-Gutierrez, D. A. Dwyer, A. M. Pfeiffer, D. E. Putnam, and D. E. Bauman
Response to Conjugated Linoleic Acid in Dairy Cows Differing in Energy and Protein Status
J Dairy Sci, December 1, 2006; 89(12): 4620 - 4631.
[Abstract] [Full Text] [PDF]

Home page
 J DAIRY SCIHome page
J. W. Perfield II, P. Delmonte, A. L. Lock, M. P. Yurawecz, and D. E. Bauman
Trans-10, trans-12 conjugated linoleic acid does not affect milk fat yield but reduces delta9-desaturase index in dairy cows.
J Dairy Sci, July 1, 2006; 89(7): 2559 - 2566.
[Abstract] [Full Text] [PDF]

Home page
 J DAIRY SCIHome page
A. L. Lock, B. M. Teles, J. W. Perfield II, D. E. Bauman, and L. A. Sinclair
A Conjugated Linoleic Acid Supplement Containing trans-10, cis-12 Reduces Milk Fat Synthesis in Lactating Sheep
J Dairy Sci, May 1, 2006; 89(5): 1525 - 1532.
[Abstract] [Full Text] [PDF]

Home page
 J DAIRY SCIHome page
C. E. Moore, J. K. Kay, R. J. Collier, M. J. VanBaale, and L. H. Baumgard
Effect of Supplemental Conjugated Linoleic Acids on Heat-Stressed Brown Swiss and Holstein Cows
J Dairy Sci, May 1, 2005; 88(5): 1732 - 1740.
[Abstract] [Full Text] [PDF]

Home page
 J. Nutr.Home page
R. Ringseis, D. Saal, A. Muller, H. Steinhart, and K. Eder
Dietary Conjugated Linoleic Acids Lower the Triacylglycerol Concentration in the Milk of Lactating Rats and Impair the Growth and Increase the Mortality of their Suckling Pups
J. Nutr., December 1, 2004; 134(12): 3327 - 3334.
[Abstract] [Full Text] [PDF]

Home page
 J DAIRY SCIHome page
J. W. Perfield II, A. L. Lock, A. M. Pfeiffer, and D. E. Bauman
Effects of Amide-Protected and Lipid-Encapsulated Conjugated Linoleic Acid (CLA) Supplements on Milk Fat Synthesis
J Dairy Sci, September 1, 2004; 87(9): 3010 - 3016.
[Abstract] [Full Text] [PDF]

Home page
 J DAIRY SCIHome page
C. E. Moore, H. C. Hafliger III, O. B. Mendivil, S. R. Sanders, D. E. Bauman, and L. H. Baumgard
Increasing Amounts of Conjugated Linoleic Acid (CLA) Progressively Reduces Milk Fat Synthesis Immediately Postpartum
J Dairy Sci, June 1, 2004; 87(6): 1886 - 1895.
[Abstract] [Full Text] [PDF]

Home page
 J DAIRY SCIHome page
J. W. Perfield II, A. Saebo, and D. E. Bauman
Use of Conjugated Linoleic Acid (CLA) Enrichments to Examine the Effects of trans-8, cis-10 CLA, and cis-11, trans-13 CLA on Milk-Fat Synthesis
J Dairy Sci, May 1, 2004; 87(5): 1196 - 1202.
[Abstract] [Full Text] [PDF]

Home page
 J DAIRY SCIHome page
J. K. Kay, T. R. Mackle, M. J. Auldist, N. A. Thomson, and D. E. Bauman
Endogenous Synthesis of cis-9, trans-11 Conjugated Linoleic Acid in Dairy Cows Fed Fresh Pasture
J Dairy Sci, February 1, 2004; 87(2): 369 - 378.
[Abstract] [Full Text] [PDF]

Home page
 J DAIRY SCIHome page
G. F. Schroeder, J. E. Delahoy, I. Vidaurreta, F. Bargo, G. A. Gagliostro, and L. D. Muller
Milk Fatty Acid Composition of Cows Fed a Total Mixed Ration or Pasture Plus Concentrates Replacing Corn with Fat
J Dairy Sci, October 1, 2003; 86(10): 3237 - 3248.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 2003 by the American Dairy Science Association ®.