Effects of zinc supplementation on laying performance of hens

Abstract

The effect of different supplemental sources of Zinc (Zinc Oxide (ZnO), Zinc Sulphate
(ZnSO4), Zinc Carbonate (ZnCO3) and Zinc Proteinate (ZnP)) was investigated in laying hensl. Diets -1 were formulated to include in which Zn in each diet was supplied at 140mgKg diet. Significant (P<0.05) differences were recorded among the treatment means in final body weight, feed intake, egg production and feed conversion ratio. Birds on the control diet significantly (P<0.05) consume more than the birds on ZnP and other inorganic Zn sources. Birds on ZnP supplemented diet recorded significantly (P<0.05) higher egg production, this was however similar to the group fed ZnSO4 supplemented diet. For better laying performance, 140 ppm of Zn in bioplex form (Zn protenieate) was recommended for laying chickens.