Effect of Short Period of Incubation during Egg Storage (Spides), Storage Period and Flock Age on Productivity of Post-Hatching Broiler Chickens

This study aimed to investigate the effect of applying the short period of incubation during egg storage (SPIDES) for the incubated eggs with relation to the periods of storage and the flock age on productive performance of post-hatching broiler chicks. A total number of 13500 eggs of broiler chicken breeders (Ross-308) obtained from El-Dakahlia Company of Poultry production. Eggs were randomly equally divided into two main groups (each of 6750 eggs), the 1^st group exposed to SPIDES at 100º F degree for 3.5 hours (egg shell temperature), and the 2^nd group didn't exposed to SPIDS and considered as control. Each main group divided into three sub-groups (each of 2250 eggs) according to the age of flock (29, 42 and 58 weeks, respectively). Each of sub-group divided into three sub-sub-groups (each of 750 eggs) according to the period of storage (6, 10 and 14 days). The results obtained revealed that broiler chicks hatched from eggs of older flock showed higher averages of live body weight (LBW), body weight gain (BWG), performance index (PI), improvement in average feed conversion rate (FCR), eviscerated, giblets and total edible parts and it recorded lower average of mortality rate (MR) at the whole time of the experiment compared with those hatched from the prime and the young flocks. In addition, egg storage has significant effect on some productive traits of post-hatched broiler chickens. Moreover, it is clearly found that applying SPIDES showed significant improve in LBW, BWG, FCR and MR of broilers. However, it has no significant effect on averages PI and carcass weights of broiler chickens. Furthermore, the interaction among studied factors has showed significant effect on the most studied traits, it is clearly found that chicks hatched from old flock, storage for 10 days and exposing to SPIDES showed higher improvement in LBW, BWG, FC and MR%. While, chicks hatched from eggs of old flock, storage for 6 days and treated with SPIDES significantly increased averages of FCR and PI%       
From the obtained results of this study, it could be recommended to treating the incubated eggs with SPIDES to improve the productive performance of broilers. Thus, chicks hatched from old flock, storage for 10 days and exposing to SPIDES seemed to be adequate to achieve the favorable results for improve the productively of broiler chicks.