Choline supplementation for Hisex Brown and Hisex White laying hens. 2. Liver lipid deposition and plasma lipids levels.

Abstract

64 sixty four week-old Hisex Brown and 64 sixty three week-old Hisex White were fed 4 experimental diets containing 500, 1000, 1500 and 2000 mg of choline/kg. the methionine level was 0.253% for all the experimental diets, equivalent to 80% of the National Research Council requirements. Although the liver weight (g) values were significantly higher for the Hisex Brown strain, liver weight (% BW), liver lipid, plasma estradiol, total plama lipids, plasma triglycerides and plasma total cholesterol did not differ significantly between strains. Plasma GOT and plasma HDL-cholesterol were significantly hogher for the Hisex Brown birds. The choline supplementation at the levels of 1500 and 2000 mg/kg determined a significant reduction of the liver lipid deposition. It was found a significant negative correlation between dietetic levels of choline and total plasma lipids (r = -0,287).