THE EFFECT OF AGE OF BIRD ON SHELL QUALITY AND COMPONENT YIELD OF EGGS

Résumé

The effect of age of birds on shell quality and yield components of egg was studies. The birds’ egg were 25, 30, 58 or 78 weeks. The egg’ weight increased by 9.92%, 26.43% and 31.46% for birds at 30, 58 and 78 weeks, respectively. While the shell weight was found to increase by 15.10%, 34.55 and 30.44% for birds at 30.58 and 78weeks, respectively. The yolk and albumen weights were found to increase by 4.05%, 11.39%, 44.72%, 18.06% and 44.72%, 24.41% for hens at 30, 58 and 78 weeks old respectively. The yolk albumen ratio was highest (0.478± 0.12) with egg laid by 58 increase in the age of birds