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THE ADDITION OF LICORICE EXTRACT TO ROOSTERS' DILUENT FOR IMPROVE QUALITY AND FERTILIZING ABILITY OF SPERMATOZOA OF WHITE LEGHORN ROOSTERS | ||
| iraqi poultry sciences journal | ||
| Article 1, Volume 2, Issue 2, 2007, Pages 46-57 | ||
| Authors | ||
| Mahmood H.M .Ameen; H.J. Al-Daraji | ||
| Abstract | ||
| This experiment was conducted at the Poultry Farm of Animal Resources Department, College of Agriculture, University of Baghdad during the period from 1/11/2005 to 1/5/2006, to investigate the effect of dietary supplementation with different levels of licorice extract on reproductive performance of White Leghorn roosters. A total of 180 birds (90 males and 90 females), 34 weeks of age were used. The birds were allocated to 3 treatments of 3 replicates per group; each replicate constitutes 20 birds (10 males and 10 females), 60 birds per group or treatment. Licorice extract was added to the diet from 38th week through the 58 weeks of age at levels of 0 (T1), 500 (T2), and 750 mg /kg of feed (T3). The traits included in the second experiment were: Mass activity, individual motility, percentages of abnormal and dead spermatozoa, percentages of fertility, hatchability, and embryonic mortality. Results of this experiment revealed that the addition of licorice extract to the roosters' diluent resulted in highly significant increase (P 0.01) in mass activity and individual motility at first week and significant increase (P 0.05) at other weeks of experiment, highly significant (p < 0.01) decrease in dead sperms percentage at first week and significant decrease (P 0.05) at other weeks of experiment and significant (P 0.05) decrease in percentage of abnormal spermatozoa at first and second weeks. However, there was highly significant (P 0.01) decrease at third weeks of the study concerning this trait. Results also indicated that diluent supplementation with licorice extract resulted in significant (P 0.05) improvement in the percentage of hatchability from total and fertile eggs, highly significant (P 0.01) improvement in fertility rates and highly significant (P 0.01) decrease in percentage of embryonic mortality as compared with control group. Furthermore, the best results for these traits were achieved by supplementing licorice extract at level of 2mg/ 100 ml of diluent (T2) in comparison with other treatments (T1 and T3). In conclusion, the addition of licorice extract to the semen diluents led to significant improvement in semen quality and fertilizing ability of spermatozoa. Meanwhile, licorice extract can be used as an addition in the semen diluent. | ||
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