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The experiment was conducted in the poultry field of the Department of Animal Production - College of Agricultural Engineering Sciences - University of Baghdad / Abu Ghraib for the period from 20/9/2021 to 31/10/2021 (42 days). The study aimed to understand the effect of adding a combination of herbal powders (Turmeric, Cumin, Anise, Cinnamon, and Coriander) in broiler diets as a growth promoter in productive performance. Besides a selected Physiological and microbial characteristic, in addition to certain oxidation indicators of meat. In the field experiment, 240 broiler chicks, Ross 308, obtained from Al Shukr Broiler Production Company, located in Baghdad / Abu Ghraib governorate, with an average initial weight of 40.28 g, were used. Chicks were randomly distributed at the age of one day into six treatments by 40 chicks for each treatment. Each treatment included four replicates, 10 chicks/replicate. The experimental treatments included control treatment T1 (free of adding herbs), and comparison treatment T2 , which contains an antibiotic (oxy-tetracycline 0.05%). The other treatments T3, T4, T5, and T6 represents a mixture of herbs in proportions (0.25, 0.50, 0.75, 1) %, as this mixture includes five types of aromatic plants (coriander powder, turmeric powder, cumin, anise, cinnamon powder). The results showed that there were no significant differences in body weight between treatments in the starter stage, where treatment T5 (0.75% addition) was superior in the grower stage. Then, no significant differences were observed in all the addition treatments in the finisher stage, but treatment T5 was superior in the weight gain in the finisher stage, while there are no significant differences between the treatments in the feed consumption. Besides, treatments T5 and T6 were superior in the second stage in the feed conversion ratio, and treatment T5 was superior in the feed conversion ratio for the total period. Also, all treatments were superior in the numbers of Lactobacilli bacteria, where a significant decrease in harmful bacteria was recorded for all addition treatment. Treatment T2 (addition of the antibiotic oxy-tetracycline 0.05%) exceeded in the villi length and mucosal thickness, in addition that there were significantly superior in the treatment T6 (1%) in the depth of the crypts.