Effect of Ovo Injection with Some Amino Acids on Hatchability and Productive Performance and Carcass Characteristics of Hatched Chicks

This study was carried out to evaluate the effect of injected ovo with different sources of amino acids on hatchability, performance, and carcass characteristics of hatched chicks. A total 360 hatching eggs were randomly divided into six treatments with 60 eggs at each group. The sequence of treatment groups was as follows: Negative Control, Dry Punch Control, Positive Control, eggs were injected with 0.5 mL normal saline, Folic Acid (FA): eggs injected with 25 mg of folic acid, Threonine (THR): eggs was injected with 10 mg of threonine, and the combination of (FA + THR), eggs was injected with 12.5 mg of folic acid and 5 mg of threonine (FA + THR). Each treatment was divided equally into three replicates (20 chickens each). All chickens received a commercial broiler diet. At the end of the experiment (5 weeks) 3 birds from each group was randomly selected, weighted, and slaughtered for studying carcass characteristics. The obtained results showed ovo injection with folic acid, threonine or the combination of these two amino acids in the fertile eggs, had no significant effects on the fertility or hatchability of fetal eggs. Also, all parameters of growth performance and carcasses characteristics did not significantly affected. While, greatest numerically values of fertile eggs% and hatchability % were reported for folic acid and water injection groups. Body gain recorded the higher numerical value for birds received the combination of the two amino acids. Folic Acid group recorded highest feed intake.