_1703402869 20231224072749000 Rovedar Daryoushbabazadeh@gmail.com Rovedar Journal of World’s Poultry Science J. World's Poult. Sci. 2980-7999 12 02 2023 2 4 Camile Kondo Nyembo https://orcid.org/0000-0003-0099-2794 Herve Tchoffo https://orcid.org/0000-0001-8678-5563 Margaret Momo Chongsi https://orcid.org/0000-0003-2863-4905 Pascaline Azine Ciza https://orcid.org/0000-0002-3693-8020 Innocent Murhula Amani https://orcid.org/0000-0002-4850-0528 Leslie Tsopingni Tieubou https://orcid.org/0000-0003-3566-6999 Raphaël Jean Kana https://orcid.org/0000-0003-0767-4115 Introduction: The ability of growth-promoting antibiotics to accumulate in livestock products such as meat, eggs, and milk, and the antibiotic resistance conferred on bacteria has prompted researchers to turn to phyto-additives. The present study was designed to evaluate the potential of Typha angustifolia rhizome powder as an alternative to antibiotic growth promoters in broiler chicken. Materials and methods: For this purpose, 512 one-day-old chickens of the Cobb500 strain were randomly distributed in a completely randomized design of 8 treatments of 16 chicks replicated four times. Experimental rations consisted of incorporating into a control ration 1 g of Doxycycline® (0+), and 1, 2, 4, 6, 8, and 10 g of Typha angustifolia /kg of feed, respectively. Results: The main results revealed that feed intake was not significantly affected by the different treatments. Over the study period, supplementing chicken with 6 g of T. angustifolia/kg increased live weight and weight gain by about 6.72% and 6.82%, respectively, compared to the negative control. Similarly, this phyto-additive, at the incorporation rate of 6 g/kg, decreased the chicken feed conversion ratio by 12.83% compared to the control without additives. The 6 g of Typha angustifolia/kg of feed induced a significant increase in the weight, length, and density of the intestine as compared to the negative control ration. This phyto-additive, whatever the rate, significantly increased the number of lactic acid bacteria, and the digestibility of crude protein and dietary fiber compared to the negative control. Apart from the serum concentration of total cholesterol and high-density cholesterol, which increased significantly with 1 g of Typha angustifolia compared to the negative control, all the haemato-biochemical parameters were not significantly affected by this phyto-additive, whatever the incorporation rate. 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