Abstract
This study was conducted with the aim of showing the effect of injecting D-Aspartic acid on characteristics of semen, for Period 15/7/2021 until 15/10/2021 in the animal farm/ Ruminant Hall of Animal Production Department /College of Agriculture / University of Diyala. This study include 12 male of Shami goat aged (1-1.3) years, with an average weight (35-38) kg, were divided randomly to four equal groups (3/ male / group): the first was a control group (without injection) (T1), while the second (T2), third (T3) and fourth (T4) groups were injected intramuscular with D- Aspartic Acid in concentration 125, 250 and 375 mg /48 hour. Semen was collected by artificial vagina ،three times during the study. The results showed that the injection of D-Aspartic acid led to highly significant increase (p<0.01) in individual motility, Mass motility, live spermatozoa percentage, Dead spermatozoa ratio, sperm concentration, abnormal spermatozoa percentage. There were significant effects (p<0.05) for injection on the Mass motility of the sperm, where T4 and T3 were superior on T1 and T2. A highly significant effect was also found (p<0.05) for injection in the individual motility where T4 was superior on T1 and T2 and T3 and T2 were superior on T1.
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