Essential oils as growth-promoting additives on performance, nutrient digestibility, cecal microbes, and serum metabolites of broiler chickens: a meta-analysis

• DOI: 10.5713/ab.20.0668
• Publication Date: 2021-01-15T07:19:56Z
• Authors: Agung Irawan; Cecep Hidayat; Anuraga Jayanegara; Adi Ratriyanto
• Keywords: Feed additive; Gizzard; Cecum

Objective: The purpose of this meta-analysis was to evaluate the effect dietary essential oils (EOs) on productive performance, nutrient digestibility, and serum metabolite profiles broiler chickens compare their effectiveness as growth-promoting additives against antibiotics.Methods: Peer-reviewed articles were retrieved from Web Science, Science Direct, PubMed, Google scholar selected based pre-determined criteria. A total 41 containing 55 experiments with 163 treatment units eligible for analyses. Data subjected a mixed model methodology considering doses EOs fixed effects different studies random effects.Results: Results showed linear increase (p<0.001) body weight gain (BWG) where Antibiotics (FCR) average daily feed intake decreased linearly an increasing dose EOs. Positive observed increased (p<0.01) digestibility dry matter, crude protein, ether extract, cecal Lactobacillus while Escherichia coli (E. coli) population in cecum linearly. There quadratic gizzard (p<0.01), spleen (p<0.05), bursa fabricius (p<0.001), liver (p< 0.10) carcass, abdominal fat, pancreas high density lipoprotein, glucose, globulin concentrations (p<0.01). In comparison control antibiotics, all type significantly reduced FCR tended (p<0.1) BWG final weight. Cinnamaldehyde-compound only showing tendency carcass weight, albumin, protein metabolites together EOs-Blend 1 E. population. Low lipoprotein concentration (p<0.05) antibiotics carvacrol-based compound when compared group.Conclusion: This evidence confirms that are suitable be used growth promoters economical benefit appears promising.