الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
A total number of 1260 fertile eggs were randomly divided into seven treatments (180 eggs/treatments with three replicates for each) to investigate the effect of in-ovo-injection of ascorbic, folic and their combination at 14th day of incubation on hatchability and subsequent broiler growth performance from 1 to 28 days post-hatch. The fertile eggs were allotted to a completely randomized experimental design with seven treatments as follow: 1- The control group, eggs were without injection.2- The second group, eggs were injected with 0.1ml distiller water/ egg. 3- The third group, eggs were injected with 0.1ml solution 6 µg AA /egg. 4- The fourth group, eggs were injected with 0.1ml solution containing 75 µg FA /egg. 5- The fifth group, eggs were injected with 0.1ml solution containing 150 µg FA /egg. 6- The six group, eggs were injected with 0.1ml solution containing 6 µg AA + 75µg FA/egg. 7- The seven group, eggs were injected with 0.1ml solution containing 6 µg AA+150µg FA /egg. The results indicated that hatchability of fertile eggs % was improved due to injection of 6 µg AA/egg and with combination between 6 µg AA and 150 µg FA/egg by about 9.97 and 3.71%, respectively as compared to the control group. In respect of subsequent effect after hatch, the results revealed that in-ovo injection treatments with AA6 µg, FA75 µg, FA150 µg and AA6 µg +FA75 µg recorded the best value of live BW compared to the control group by about from 51.46 to 69.48 g/ bird at 28 days of age. Feed intake was insignificant increased as a result of all in-ovo injection treatments with exception feed intake of chicks from eggs injected with AA6 µg. No significant influence due to in–ovo injected with AA, FA and their combination on FCR could be detected as compared to the control group. In-ovo injection of AA, FA and their combination significantly decreased triglycerides (TG) levels in serum blood. Also, the level of HDL significantly improved due to in-ovo injected with AA6 µg and FA75. Therefore, it could be mentioned that in-ovo injection of 6µg AA/egg and 6µg AA6 µg +150µg FA/egg in broiler eggs at 14th day of incubation can be applied to improve the hatchability of fertile eggs and subsequent growth performance during the period from 1 to 28 days of age.