Submitted to: Annual Meeting and Expo of the American Oil Chemists' Society
Publication Type: Abstract Only
Publication Acceptance Date: 3/12/1996
Publication Date: N/A
Technical Abstract: Conjugated linoleic acid (CLA) is an intermediate compound of biohydrogenation of linoleic acid in the rumen, the first compartment of the ruminant stomach. Two experiments were conducted to determine the content of CLA in milk of cows grazing pasture (Exp. 1) or fed conserved forages (Exp. 2). In Exp. 1, three groups of cows consumed either 1/3, 2/3, or all of their daily feed from pasture of mixed grass and legume species. The balance of feed for the first two groups was supplied by a supplement containing 75% and 50% grain, respectively. The CLA contents were .84, 1.37, and 2.27 g/100 g of milk fat (P = .001) in the 1/3, 2/3, and all pasture groups, respectively. In Exp. 2, cows were fed one of two diets (normal corn vs. high oil corn) containing 50% forage and 50% grain. The CLA content in milk was similar for both groups and averaged .39 g/ 100 g of milk fat. Milk from cows grazing pasture had higher CLA content than milk from cows fed conserved diets containing 50:50 forage and grain.