Effects of garlic and black seed powder on performance of laying quails exposed to glucocorticoids

Document Type : Original Article

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Abstract

The purpose of the present study was to investigate the effects of garlic or black seed powder on performance of stressed laying Japanese quails. A total of 120 Japanese quails at 11 weeks of age were randomly assigned into 12 cages and then allocated to three groups of Control group, fed with 30 gr/kg garlic powder and fed with 20 gr/kg black seed powder. At week 15 of age, a half of the birds from each group were subcutaneously injected with glucocorticoids (Dexamethasone, 2 mg per kg of body weight daily for 7 days), and a half injected with the same volume of saline. Seven days after injection, two birds from each pen were selected and blood samples were taken from the wing vein for harvesting plasma. The results showed that dexamethasone led to a reduction in body weight and egg production. Plasma uric acid content of dexamethasone treated birds was higher as compared to saline injected birds. Uric acid is an index of increased protein catabolism due to glucocorticoids stress. However, the inclusion of garlic or black seed powder in the diet did not improve quails performance.

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