الفهرس 
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Abstract
The present study was planned to investigate the effect of addition of some
feed additives (lactose, yeast and organic acids combination
on performances, immunity, and reproductive status of both
growing and laying Japanese quail. A total of 180 unsexed Japanese quail
healthy chicks one-week- old were used in 35 day growth performance
trial. When the birds reached 42 days of age (sexual maturity), all birds
were sexed and transferred to layer cages for 12 weeks reproductive and
laying trial. Results of 0.3% yeast, 0.1 % lactose and OAC or OAC with
lactose improved the growth performance, immune response and reduced
cost of production especially due to 0.1 % lactose and OAC with lactose.
One tenth % lactose, OAC and OAC with lactose have the highest positive
effect on egg production, fertility and chick quality.