Abstract
This study evaluated the effects of oregano essential oil on performance and egg quality parameters of laying hens. In experiment, a total of 144 fourty-week-old H&N Super Nick laying hens were assigned to the basal control diet supplemented with 50, 100, 150, 200 and 250 mg/kg of oregano essential oil (6 treatment diets, 8 replicates, each replicate consists of 3 hens). Hens were fed experimental diets from 40 to 52 weeks of age. Water and feed were supplied ad libitum throughout the experiment. The results of study indicated that there were no differences on egg production, feed intake, feed conversion ratio, egg weight, egg mass as a performance parameter among the treatment groups. The eggshell ratio, eggshell thickness and eggshell breaking strength had no significantly affected by the dietary treatments. The results of this study demonstrated that performance and eggshell quality were not significantly influenced with oregano oil addition in laying hens diet. The results of study that different levels of dietary oregano essential oil had no significant effect on performance and eggshell quality parameters in laying hens.
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