Abstract
An experiment was conducted to determine the effects of dietary supplementation of yeast Rhodotourula glutinis(Glutincus) on the performance and egg quality of layers. A total of 360 ISA Brown layers of 72 weeks old were assigned to one of the following 6 diets :control, 25 ppm ${\beta}$-carotene. 0.5%, 1%, 2% and 4% Glutinicus supplemented diet. Each treatment was replicated three times with 20 birds housed in 2 birds cage units. Glutinicus supplemented at the level of 0.5% significantly(p<0.05) improved egg production and FCR. Soft and broken egge production rate decreased as the level of Glutinicus supplementation increased. Eggshell was highest in Glutinicus 4% supplementation. Egg yolk color increased linearly as the level of Glutinicus supplementation increased up to 2% of the diet. It was concluded that Glutinicus supplementation at the level of 0.5% can be recommended for the improvement of egg production while 2.0% can be recommended for egg yolk pigmentation.