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Abstract

The aim of the present study was to evaluate the effects of dietary supplementation with or without Bacillus subtilis (B. subtilis) on carcass traits, meat quality, amino acids, and fatty acids of broiler chickens. In total, 160 1-day-old Arbor Acres male broiler chicks were divided into two groups with eight replicates of 10 chicks each. Chickens received basal diets without (CN group) or with 500 mg/kg B. subtilis (BS group) for 42 days. Eight chickens from each group were slaughtered at the end of the trial, and carcass traits, meat quality, chemical composition, amino acid, and fatty acid profile of meat were measured. The results showed that the breast muscle (%) was higher in BS than in CN (p < 0.05), while abdominal fat decreased (p < 0.05). The pH24h of thigh muscle was increased (p < 0.05) when supplemented with BS; however, drip loss, cooking loss of breast muscle, and shear force of thigh muscle decreased (p < 0.05). Lysine (Lys), methionine (Met), glutamic acid (Glu), and total essential amino acid (EAA) in breast muscle and Glu in thigh muscle were greater in BS than in CN (p < 0.05). C16:1, C18:1n9c, and MUFA in breast muscle and thigh muscle were greater in BS than in CN (p < 0.05). In conclusion, dietary supplementation with B. subtilis could improve the carcass traits and meat quality of broilers, which is beneficial for the consumers due to the improved fatty acid profile and amino acid composition.

Keywords: Bacillus subtilis; amino acid; broiler; carcass trait; fatty acid; meat quality.

Research Insights

SupplementHealth OutcomeEffect TypeEffect Size
Bacillus subtilis AB22Enhanced Meat QualityBeneficial
Moderate
Bacillus subtilis AB22Improved Amino Acid CompositionBeneficial
Large
Bacillus subtilis AB22Improved Carcass CharacteristicsBeneficial
Moderate
Bacillus subtilis AB22Improved Lipid ProfileBeneficial
Large
Bacillus subtilis HU58Enhanced Meat QualityBeneficial
Moderate
Bacillus subtilis HU58Improved Amino Acid ProfileBeneficial
Large
Bacillus subtilis HU58Improved Fatty Acid ProfileBeneficial
Large
Bacillus subtilis HU58Increased Muscle MassBeneficial
Moderate
Bacillus subtilis HU58Reduced Abdominal FatBeneficial
Moderate
Bacillus subtilis MB40Enhanced Meat QualityBeneficial
Moderate
Bacillus subtilis MB40Improved Amino Acid CompositionBeneficial
Large
Bacillus subtilis MB40Improved Carcass CharacteristicsBeneficial
Moderate
Bacillus subtilis MB40Improved Milk Fatty Acid ProfileBeneficial
Moderate

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