Effect of Nano Methionine- zinc in Productive Performance of Broiler Exposed to Heat Stress

Abstract

Nano amino acids manufactured by green synthesis are a promising method in the poultry industry to achieve more significant benefits from minerals and amino acids. From 25-7-2023 to 29-8-2023, 300-day-old (Ross 308) broiler chicks were allocated into five random treatments, each being replicated three replicate with 15 chicks in each replication. Methionine-zinc nanoparticles were supplemented to the diet at 0.0, 1, 2, 3, and 4 mg/kg for treatments T1 (control treatment), T2, T3, T4, and T5, respectively, all treatments exposed to heat stress of (35±1 ⁰C) during the experiment period. Our findings showed that the treatments T2 and T5 had significant (P<0.05) increases in live body weight, well the T3, T4, and T5 treatments had a significant advantage in total weight gain, in feed intake, the T5 treatment was a more significant significantly in a fifth week overall, as well significant (P<0.05) improvement for T2, T3, T4, and T5 treatments in total feed conversation ratio, packed cell volume (PCV), and H/L ratio compared to T1 treatment, at the same time, the control treatment had the highest percentage of mortality and heterophil cell, significant (P<0.05) increase for T3 treatment in lymphocyte cell. It is concluded that nano methionine-zinc improved broilers' productive and physiological performance under heat-stress conditions.