Ayman Gamal Fawzy EL Nagar
Professor
Harnessing natural feed additives for sustainable production and economics: the role of Thymus vulgaris L. oil as an antimicrobial agent and a growth promoter in improving production and health of broiler chickens
• 2025
Publication Information
Authors
Ahmed M. Saied1, Adel I. Attia1, Fayiz M. Reda1,
Mohamed S. El-Kholy1, Mohammed A. Al-Badwi2,
Mahmoud Azzam2, Alessandro Di Cerbo3,
Mahmoud Alagawany1, Khaled A. El-Tarabily4*
and Ayman G. EL Nagar5
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publication.type
International
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Abstract
Introduction: This study examined the effects of adding thyme oil (TO) to broiler
diets on growth performance, intestinal health, immune organ indices, blood
biochemical parameters, and economic feasibility.
Methods: In a completely randomized block design, five groups of 1-day-old
broiler chicks (n=300) with five replicates, each consisting of 12 chicks, were
used. A basal diet (BD) was supplied to the control group, whereas the other
groups received BD supplemented with 75, 150, 225, and 300 mg/kg of TO.
Results and discussion: The findings indicated that TO improved final body
weight (BW), total body weight gain (BWG) and the feed conversion ratio (FCR),
without affecting feed intake (FI). Groups fed 150, 225, and 300 mg/kg of TO
showed higher levels of digestive enzymes (P
diets on growth performance, intestinal health, immune organ indices, blood
biochemical parameters, and economic feasibility.
Methods: In a completely randomized block design, five groups of 1-day-old
broiler chicks (n=300) with five replicates, each consisting of 12 chicks, were
used. A basal diet (BD) was supplied to the control group, whereas the other
groups received BD supplemented with 75, 150, 225, and 300 mg/kg of TO.
Results and discussion: The findings indicated that TO improved final body
weight (BW), total body weight gain (BWG) and the feed conversion ratio (FCR),
without affecting feed intake (FI). Groups fed 150, 225, and 300 mg/kg of TO
showed higher levels of digestive enzymes (P