Akademik Veri Yönetim Sistemi
JOURNAL OF APPLIED ANIMAL RESEARCH, cilt.36, sa.1, ss.49-52, 2009 (SCI-Expanded)
To determine the effects of sources of supplemental fat 200 Isa Brown layers were equally divided in 5 groups and assigned randomly to be fed ad libitum a standard commercial layer feed (BD), BD+ 4% tallow (T), BD+ mixture of 2% tallow and 2% flaxseed oil (MTFO), BD+ 4% sunflower oil (SO) and BD+ 4% flaxseed oil (FO) for 8 weeks. Dietary fat supplemantion affected the laying performance, but had no (P>0.05) effect on egg quality parameters. The supplemental tallow increased concentration of saturated fatty acids (palmitic: 29.10%, stearic:10.17%). The proportions of linoleic and arachidonic acids in egg yolks for layers fed the diet containing 4% sunflower oil were higher than other diets. The concentration of oleic acid (40.08%) was the highest in layers receiving 2% tallow + 2% flaxseed oil diet. In addition, dietary flaxseed oil increased the concentration of alpha-linolenic (4.15%) and DHA (2.54%) in yolk at the expense of other unsaturated fatty acids. It is concluded that dietary animal and plant fats can be used to modify composition of egg yolk.