Chemical elements in egg shell of a commercial strain of domestic fowl managed in a tropical environment
A study was conducted to determine the chemical elements of the egg shell of exotic commercial pullets (Lohmann) in their first laying year. A total of 160 eggs from eighty pullets were randomly selected at three-monthly intervals during the production year for the ddermination of chemical elements or the eggshell. The average concentrations of calcium, magnesium, phosphorus, nitrogen, potassium, sodium, zinc, and iron were 90.36%, 0.87%, 0.90%, 3.85%, 0.51 %, 0.10%, 0.002%, · and 0.005% respectively. Most of the paired variates of the miaeral elements showed significant (P < 0.01) inter-relationship as depicted by measures of correlation coefficients. There were no significant relationships between Ca and most mineral elements and on the other hand mg was signficantly correlated with phosphorus, N, K, and Zn. Correlation coefficients between P and Fe, N and Na, Zn or Fe and between Na and Zn were not significant.
Key Words: Egg shell, chemical elements, Tropical environment.