Effect of adding natural zeolite and vitamin E to diets of laying hens ( Lohman Brown) on some physiological traits and productive performance during hot weather.

This study was conducted in a poultry farm of the Department of Animal Production / College of the Agriculture/University of Anbar, from 20/7/2021 to 12/10/2021, aiming to study the effect of adding zeolite to the diets on productive performance and some physiological qualities characteristics of laying hens. Seventy-two laying hens of Lohman Brown were used in this experiment at the age of 43 weeks and distributed randomly to six treatments with four replications (3 hens/ replicate). The birds were fed with the diet with the additives, and the treatments were as follows: T1 (Vit E 0.06), T2, T3, T4 and T5 with an addition of 0.25, 0.50, 0.75 and 1.0% relay, normal zeolite and T6 control treatment.
 
Results showed moral differences (P≤0.05) in the egg mass, the ratio of egg production and the number of cumulative eggs for T3, T4 and T5 treatments during the productive duration of the experiment.
 
Keywords: natural zeolites, productive performance, heat stress, laying hens.