| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
1 Dairy Science Department, Virginia Tech, Blacksburg, VA 24061-0315
Thirty Holstein cows grazing mixed clover-grass pastures for 12 wk from May through July were fed a grain supplement containing solvent-extracted soybean meal (SES), or mechanically extracted soybean meal (MES) to determine whether differences in supplemental 18:2n6 fatty acid intake altered secretion of unsaturated fatty acids. Groups of 10 cows each were fed in two equal feedings a supplement (7.3 kg/d) containing ground corn plus either 1.8 kg of SES, 2.2 kg of MES, or 2.2 kg of MESplus 30 g of methionine hydroxy analog (Alimet; MESM). Fatty acid content (% of DM) of grass and clover in pastures averaged 1.9 and 1.5%, respectively. Concentration of 18:3n3 was higher in grass compared with clover (532 vs. 454 mg/g of total fatty acids). Yield of milk (32 kg/d average) and milk components did not differ by supplements. Total blood plasma fatty acids (mg/ml) during wk 4 were higher due to MESM (1.0) compared with MES (0.6) or SES (0.6). Cows fed MESM or MES had greater concentrations of 18:2n6, trans11-18:1, and cis9,trans11-18:2 in plasma compared with cows fed SES. The additional trans11-18:1 was found exclusively in plasma triglycerides, whereas the additional cis9, trans11-18:2 was found in plasma phospholipids and free fatty acids. Daily yields of 18:2n6, trans11-18:1 and cis9, trans11-18:2 in milk fat were greater for cows fed MES or MESM compared with SES. Results indicate yields of trans11-18:1, cis9, trans11-18:2, 18:2n6, and 18:3n3 in milk fat of pasturefed cows were enhanced by feeding a grain supplement containing mechanically extracted, rather than solvent-extracted, soybean meal.
Key Words: trans-vaccenic acid • cis9, trans11-18:2 • trans11,cis15-18:2 • soybean meal
Submitted on August 23, 2001
Accepted on November 30, 2001
This article has been cited by other articles:
|
|
 |
|
  C. Tyburczy, A. L. Lock, D. A. Dwyer, F. Destaillats, Z. Mouloungui, L. Candy, and D. E. Bauman Uptake and Utilization of Trans Octadecenoic Acids in Lactating Dairy Cows J Dairy Sci, October 1, 2008; 91(10): 3850 - 3861. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 K. R. Wilson, C. S. Abney, J. T. Vasconcelos, M. Vazquez-Anon, J. P. McMeniman, and M. L. Galyean Effects of 2-hydroxy-4-(methylthio)-butanoic acid on performance and carcass characteristics of finishing beef cattle and on fermentation in continuous culture J Anim Sci, August 1, 2008; 86(8): 1951 - 1962. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. K. G. Kadegowda, L. S. Piperova, and R. A. Erdman Principal Component and Multivariate Analysis of Milk Long-Chain Fatty Acid Composition During Diet-Induced Milk Fat Depression J Dairy Sci, February 1, 2008; 91(2): 749 - 759. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. A. AbuGhazaleh and L. D. Holmes Diet Supplementation with Fish Oil and Sunflower Oil to Increase Conjugated Linoleic Acid Levels in Milk Fat of Partially Grazing Dairy Cows J Dairy Sci, June 1, 2007; 90(6): 2897 - 2904. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 K. J. Shingfield, S. Ahvenjarvi, V. Toivonen, A. Vanhatalo, and P. Huhtanen Transfer of Absorbed cis-9, trans-11 Conjugated Linoleic Acid into Milk Is Biologically More Efficient than Endogenous Synthesis from Absorbed Vaccenic Acid in Lactating Cows J. Nutr., May 1, 2007; 137(5): 1154 - 1160. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
S. L. Lake, T. R. Weston, E. J. Scholljegerdes, C. M. Murrieta, B. M. Alexander, D. C. Rule, G. E. Moss, and B. W. Hess Effects of postpartum dietary fat and body condition score at parturition on plasma, adipose tissue, and milk fatty acid composition of lactating beef cows J Anim Sci, March 1, 2007; 85(3): 717 - 730. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. Ferlay, B. Martin, Ph. Pradel, J. B. Coulon, and Y. Chilliard Influence of grass-based diets on milk Fatty Acid composition and milk lipolytic system in tarentaise and montbeliarde cow breeds. J Dairy Sci, October 1, 2006; 89(10): 4026 - 4041. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
H. W. Soita, M. Fehr, D. A Christensen, and T. Mutsvangwa Effects of Corn Silage Particle Length and Forage:Concentrate Ratio on Milk Fatty Acid Composition in Dairy Cows Fed Supplemental Flaxseed J Dairy Sci, August 1, 2005; 88(8): 2813 - 2819. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
E. L. Jones, K. J. Shingfield, C. Kohen, A. K. Jones, B. Lupoli, A. S. Grandison, D. E. Beever, C. M. Williams, P. C. Calder, and P. Yaqoob Chemical, Physical, and Sensory Properties of Dairy Products Enriched with Conjugated Linoleic Acid J Dairy Sci, August 1, 2005; 88(8): 2923 - 2937. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
R. C. Khanal, T. R. Dhiman, A. L. Ure, C. P. Brennand, R. L. Boman, and D. J. McMahon Consumer Acceptability of Conjugated Linoleic Acid-Enriched Milk and Cheddar Cheese from Cows Grazing on Pasture J Dairy Sci, May 1, 2005; 88(5): 1837 - 1847. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. J. Loor, A. Ferlay, A. Ollier, M. Doreau, and Y. Chilliard Relationship Among Trans and Conjugated Fatty Acids and Bovine Milk Fat Yield Due to Dietary Concentrate and Linseed Oil J Dairy Sci, February 1, 2005; 88(2): 726 - 740. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. J. Loor, K. Ueda, A. Ferlay, Y. Chilliard, and M. Doreau Biohydrogenation, Duodenal Flow, and Intestinal Digestibility of Trans Fatty Acids and Conjugated Linoleic Acids in Response to Dietary Forage:Concentrate Ratio and Linseed Oil in Dairy Cows J Dairy Sci, August 1, 2004; 87(8): 2472 - 2485. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. A. AbuGhazaleh, D. J. Schingoethe, A. R. Hippen, and K. F. Kalscheur Conjugated Linoleic Acid Increases in Milk When Cows Fed Fish Meal and Extruded Soybeans for an Extended Period of Time J Dairy Sci, June 1, 2004; 87(6): 1758 - 1766. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
T. Mutsvangwa, J. K. G. Kramer, C. B. Blackadar, T. F. Duffield, R. Bagg, P. Dick, G. Vessie, and B. W. McBride Short Communication: Effects of a Monensin Premix on Milk Fatty Acid Content During Subacute Ruminal Acidosis in Dairy Cows J Dairy Sci, December 1, 2003; 86(12): 4043 - 4046. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. A. AbuGhazaleh, D. J. Schingoethe, A. R. Hippen, and K. F. Kalscheur Conjugated Linoleic Acid and Vaccenic Acid in Rumen, Plasma, and Milk of Cows Fed Fish Oil and Fats Differing in Saturation of 18 Carbon Fatty Acids J Dairy Sci, November 1, 2003; 86(11): 3648 - 3660. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. J. Loor, W. H. Hoover, T. K. Miller-Webster, J. H. Herbein, and C. E. Polan Biohydrogenation of unsaturated fatty acids in continuous culture fermenters during digestion of orchardgrass or red clover with three levels of ground corn supplementation J Anim Sci, June 1, 2003; 81(6): 1611 - 1627. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
R. E. Dietz, J. B. Hall, W. D. Whittier, F. Elvinger, and D. E. Eversole Effects of feeding supplemental fat to beef cows on cold tolerance in newborn calves J Anim Sci, April 1, 2003; 81(4): 885 - 894. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
