Trans-Octadecenoic Acids and Milk Fat Depression in Lactating Dairy Cows

摘要: We examined the role of trans-octadecenoic acids in milk fat depression when low fiber diets were fed. The study consisted four experimental periods with a 2 × factorial arrangement treatments to test effects dietary (saturated vs. unsaturated) and rumen fermentation (high diets) on depression. Dietary concentration type had significant fat. Effects most pronounced unsaturated was added diet. When diet plus fed, percentage yield decreased by 30 35%, respectively, compared high saturated Alterations caused differences concentrations little effect amount fat, total did not correlate changes percentage. Further examination isomeric profile acid revealed substantial among treatments. Although addition resulted marked increases content trans11-octadecenoic acid, regardless concentration, increased trans-10-octadecenoic acid. This combination also associated decrease yield. circulating insulin elevated, supplement. However, occurred only supplemented