THE EFFECTS OF GLUTAMINE AND GLUTAMIC ACID VS MICROORGANISM PRODUCING GLUTAMIC ACID SUPPLEMENTATION ON PERFORMANCE AND INTESTINAL MORPHOLOGY OF BROILER CHICKENS
Sayed, K., Youns, T., El Moghazy, G., Hamady, G. (2025). THE EFFECTS OF GLUTAMINE AND GLUTAMIC ACID VS MICROORGANISM PRODUCING GLUTAMIC ACID SUPPLEMENTATION ON PERFORMANCE AND INTESTINAL MORPHOLOGY OF BROILER CHICKENS. EKB Journal Management System, 28(2), 177-190. doi: 10.21608/ejnf.2025.445840
K. S. Sayed; T. M. Youns; Gihan, M. El Moghazy; G. A.A. Hamady. "THE EFFECTS OF GLUTAMINE AND GLUTAMIC ACID VS MICROORGANISM PRODUCING GLUTAMIC ACID SUPPLEMENTATION ON PERFORMANCE AND INTESTINAL MORPHOLOGY OF BROILER CHICKENS". EKB Journal Management System, 28, 2, 2025, 177-190. doi: 10.21608/ejnf.2025.445840
Sayed, K., Youns, T., El Moghazy, G., Hamady, G. (2025). 'THE EFFECTS OF GLUTAMINE AND GLUTAMIC ACID VS MICROORGANISM PRODUCING GLUTAMIC ACID SUPPLEMENTATION ON PERFORMANCE AND INTESTINAL MORPHOLOGY OF BROILER CHICKENS', EKB Journal Management System, 28(2), pp. 177-190. doi: 10.21608/ejnf.2025.445840
Sayed, K., Youns, T., El Moghazy, G., Hamady, G. THE EFFECTS OF GLUTAMINE AND GLUTAMIC ACID VS MICROORGANISM PRODUCING GLUTAMIC ACID SUPPLEMENTATION ON PERFORMANCE AND INTESTINAL MORPHOLOGY OF BROILER CHICKENS. EKB Journal Management System, 2025; 28(2): 177-190. doi: 10.21608/ejnf.2025.445840

THE EFFECTS OF GLUTAMINE AND GLUTAMIC ACID VS MICROORGANISM PRODUCING GLUTAMIC ACID SUPPLEMENTATION ON PERFORMANCE AND INTESTINAL MORPHOLOGY OF BROILER CHICKENS

Egyptian Journal of Nutrition and Feeds
Volume 28, Issue 2, August 2025, Page 177-190  XML PDF (521.82 K)
Document Type: Original Article
DOI: 10.21608/ejnf.2025.445840
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Authors
K. S. Sayed1; T. M. Youns1; Gihan, M. El Moghazy2; G. A.A. Hamady3
1Department of Animal production, Faculty of Agriculture, Al-Azhar University- Nasr City, Cairo11754, Egypt.
2Regional centers for food and Feed, Agricultural Research Center, Giza, Egypt
3Department of Animal production, Faculty of Agriculture, Al-Azhar University- Nasr City, Cairo11754, Egypt
Abstract
This study evaluated the effects of dietary supplementation with glutamine (Gln), glutamic acid (Glu), and glutamic acid-producing bacteria on broiler chickens, focusing on growth performance, intestinal morphology, carcass characteristics, some blood measurements and economic efficiency. A total of 324 unsexed Ross 308 broiler chicks (average initial weight: 41.11 g) were assigned on day 5 to 42 floor pens (12 birds per pen), with three replicate pens per treatment. Birds were managed under a three-phase feeding program: starter (days 5–10), grower (days 11–24), and finisher (days 25–42), with diets formulated to meet broiler nutritional requirements. The treatments were as follows G1 (Control): Chicks were fed the basal diet, G2 : G1 plus 0.05% Glu, G3 : G1 plus 0.1% Glu, G4 : G1 plus 0.05% Gln, G5 : G1 plus Gln 0.1%, G6 : G1 plus 1cm3\ Kg diet biological sources (2-Bacillus subtilis), G7 : G1 plus 1cm3\ Kg diet biological sources (2-Bacillus zero),  G8 : G1 plus 1cm3\ Kg diet biological sources (Enterococcus faecium) and G9 : G1 plus 1cm3\ Kg diet biological sources (Enterococcus zero).  Results indicated that 0.05% Gln (G4) supplementation numerically enhanced body weight gain (BWG) and feed conversion ratio (FCR), while also improving intestinal health, as evidenced by increased villus height (VH) and a higher VH-to-crypt depth (VH/CD) ratio. Carcass characteristics were not significantly affected in all groups. Also, results indicated that the liver functions (ALT, AST), serum antioxidant (SOD, GPX) and the European production efficiency factors (EPEF) improved by 0.05% Gln supplementation
Keywords
Glutamine; glutamic acid; probiotic; broilers; performance; intestinal health; blood measurements
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