الفهرس | Only 14 pages are availabe for public view |
Abstract SUMMARY-126 SUMMARY The present study was carried out at the Poultry Farm of The Egyptian Arab Company for Poultry - In- Kilo 72 Cairo-Alexandria Desert Road 6th of October City - Egypt. The Experiment lasted from November 2008 until February 2010. In order to, estimate some studies on the characteristics of egg production {such as Egg production (H.H&H.D), Fertility(F), Hatchability (H), Number of chicken, egg weight (EW), age at sexual maturity, body weight (BW)} In addition to some other Traits and try to improve it economically, In Cobb 500 Broiler Breeder chickens. The experiment was planned to investigate the relationship of age at sexual maturity and some economic traits in Cobb 500 Broiler Breeder chickens. The onset of sexual maturity is regulated by day length response to light becomes important only as these birds approach sexual maturity. A total of (5612 bird {4880 female + 732 male}) 1-d-old Cobb 500 broiler breeder pullets were use in this study. Results were discussed and summarized as follows : 1. Means: 1.1. There were significant differences (P≤0.05 ) between males and females for body weight , feed consumption and mortality. 1.2. Means of BW between groups of birds were 1542.42, 1609.98 and 1612.2 g in (C), (G1) and (G2) during growing period. |