The Effect Of Different Sources Of Dietary Zinc On Egg Production, Egg Quality, Sperm Quality, And Immunological Response In Laying Chickens Exposed To High Temperature

Abstract

A total of 300 hens and 60 males of (the Bandarah strain at 30 weeks old) were chosen at random allocated to 3 groups, with 5 replicates of 20 hens and 4 cocks/each housed in individual cages in a semi-closed house. Birds received one of three dietary treatments content zinc sulfate or organic zinc as zinc methionine in two levels of 40 or 60 mg/kg, the experiment lasted for 20 weeks from 30-50 weeks of age. Results showed that a dietary Zn-Met 40 or 60 mg/kg diet boosted egg production and improved feed conversion ratio, egg weight, and egg mass. Zinc methionine showed distinctions between external and internal egg quality, Zn content of the egg, and carbonic anhydrase activity compared with zinc sulfate. A high level of Zn-Met had increased estrogen, progesterone, and T3. Also, Humoral and cellular immunity were increased, and improved semen quality. It could be concluded that dietary Zn-Met at 60 mg/kg improved egg generation, egg value, semen quality, and immune status of laying Bandarah strain.