Sim J S, Bragg D B
Poult Sci. 1978 Mar;57(2):466-72. doi: 10.3382/ps.0570466.
Effect of dietary lipid factors (saturated and unsaturated oil, zoo and phytosterols) on the lipid concentration and fatty acid composition of egg yolk, liver and serum of the laying hen were studied. Single Comb White Leghorn laying hens, at 30 weeks of age, were fed two basal diets containing 8.0% hydrogenated coconut oil (HCO) or safflower oil (SFO), with or without supplemental cholesterol (1.0%), soysterols (2.0%) or combination of both. When HCO basal diet was fed, both liver weight and lipid content were significantly (P less than .01) increased as compared to hens fed the SFO diet. Cholesterol feeding increased total lipid content in liver and serum, whereas soysterol feeding reduce or diminish lipid accumulation caused by the cholesterol treatment. Both dietary cholesterol and soysterols alter the fatty acid composition of liver, serum and egg yolk lipids by increasing oleic acid and decreasing palmitic and/or stearic acids. These changes were significantly greater upon feeding cholesterol than soysterols. However, the simultaneous feeding of cholesterol with soysterols exerted the least effect on the fatty acid composition.
研究了日粮脂质因素（饱和油和不饱和油、动物甾醇和植物甾醇）对蛋鸡蛋黄、肝脏和血清脂质浓度及脂肪酸组成的影响。选用30周龄的单冠白来航蛋鸡，饲喂两种基础日粮，分别含8.0%氢化椰子油（HCO）或红花油（SFO），添加或不添加胆固醇（1.0%）、植物甾醇（2.0%）或两者的组合。饲喂HCO基础日粮时，与饲喂SFO日粮的母鸡相比，肝脏重量和脂质含量均显著（P<0.01）增加。添加胆固醇会增加肝脏和血清中的总脂质含量，而添加植物甾醇会减少或减轻胆固醇处理导致的脂质积累。日粮中的胆固醇和植物甾醇都会通过增加油酸含量、降低棕榈酸和/或硬脂酸含量来改变肝脏、血清和蛋黄脂质的脂肪酸组成。饲喂胆固醇时这些变化比饲喂植物甾醇时显著更大。然而，同时饲喂胆固醇和植物甾醇对脂肪酸组成的影响最小。
