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THE USE OF LICORICE EXTRACT Glycyrrhiza glabra TO ENHANCE THE REPRODUCTIVE EFFICIENCY OF LOHMANN ROOSTERS REARED DURING DIFFERENT MONTHS OF YEAR | ||
| IRAQ JOURNAL OF AGRICULTURE | ||
| Article 1, Volume 14, Issue 5, 2009, Pages 0-0 | ||
| Authors | ||
| H. J. Al-Draji; H. A. Al-Mashadani; W. K. Al-Hayani; D. H. Al-Hassani | ||
| Abstract | ||
| This experiment was conducted at the Poultry Farm, College of Agriculture- University of Baghdad to evaluate the effect of the supplementation of the roosters ration with different levels of licorice extract on reproductive performance of roosters reared during different months of the year. A total of 28 Lohmann cocks, 24 weeks old were allocated at random into 4 treatment groups of 7 cocks each. Licorice extract was added to the cocks diet from the first day of experiment until the end of experiment which lasted 8 months (July to March) at the levels of 0 (control group; C), 250 mg/kg of diet (T1), 500 mg/kg of diet (T2), and 750 mg/kg of diet (T3). Semen was collected from all cocks twice a month for evaluate semen traits which included semen volume, spermatozoa concentration, mass motility, individual motility, percentage of dead spermatozoa , percentage of abnormal spermatozoa, spermatocrit and acrosomal abnormalities. Seminal plasma traits were also evaluated as regards concentrations of glucose, protein, cholesterol and activities of alkaline phosphatase, GOT and GPT. Results revealed that the addition of licorice extract to the cocks diet especially treatments T2 and T3 resulted in significant increase (p0.05) in semen volume, spermatozoa concentration , mass and individual motility, spermatocrit and alkaline phosphatase activity and significant decrease (p0.05) in percentages of dead and abnormal spermatozoa and acrosomal abnormalities and concentrations of glucose , protein , cholesterol and activities of GOT and GPT enzymes in seminal plasma as compared with C and T1 groups. However, there were no significant differences between C and T1 groups concerning all traits included in this experiment in spite of that there was clear trend for the improvement in these traits in T1 group as compared with C group. In conclusion, feeding diet containing different levels of licorice extract especially at levels of 500 and 750 mg/kg of diet resulted in significant improvement in reproductive performance of roosters reared during different months of year. Thus, licorice extract can be used as efficient tool for reinforce the reproductive efficiency of roosters reared during different periods of the year. | ||
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