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