Document Type : Research Paper


1 M.Sc. Student, Department of Animal Science, Faculty of Agricultural Science and Engineering, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran

2 Assistant Professor, Department of Animal Science, Faculty of Agricultural Science and Engineering, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran


The aim of the present research was to study the effect of different concentrations of rosemary (Rosmarinus officinalis L.) extract, (0, 10, 12.5, 16.6, 25 and 50) mg/L added to semen extender, on sperm qualitative and quantitative parameters after freezing-thawing process of rooster sperm. 10 Ross strain rooster were used. Semen samples were collected, 2 times a week. After adding the samples of semen based on the lecithin extender, they were placed and preserved at 5 ° C. The treatments of 10 and 12.5 mg/L of Rosemary significantly improved the mobility, in addition, treatments of 10, 12.5 and 16.6 mg/L improved progressive motility and viability before freezing (p≤ 0.05). The lowest and highest motility rates were respectively found in treatments of 0 and 10 mg/L of essential oil of rosemary (p≤ 0.05). Functional integrity of the sperm plasma membrane increased with treatment of 10 mg/L of essential oil of rosemary in comparison to other groups, except 12.5 mg/L. Also treatments of 10, 12.5 and 16.6 mg/L significantly decreased the apoptosis. According to these results, it seems that adding the levels of 10 and 12.5 mg/L rosemary extract’ in semen, based on lecithin extender can improve rooster’s sperm quality after thawing.


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