迷迭香提取物对肉鸡生长性能、血清抗氧化指标、肌肉氨基酸组成和风味物质的影响OA

This study investigated the effects of dietary rosemary extract(RE)on growth performance,serum antioxidant indices,muscle amino acid composition,and flavor substances in broilers.In a completely randomized design,320 one-day-old Arbor Acres broilers were allotted to four groups(8 replicates of 10 birds each):a control(CON,basal diet)and three groups fed the basal diet supplemented with 150,300,or 600 mg/kg RE(RE150,RE300,RE600).The trial lasted 42 days.Results indicated that compared with CON,the RE300 and RE600 groups showed significantly increased final body weight(by 9.8%and 6.8%)and average daily gain(by 9.6%and 6.8%),and a reduced feed-to-gain ratio(by 5.9%and 4.3%)(P＜0.05).The RE300 group exhibited markedly enhanced serum total antioxidant capacity(38.4%)and glutathione peroxidase activity(35.2%),along with a 41.3%reduction in malondialdehyde content versus CON(P＜0.05).Muscle total amino acids and the essential amino acid ratio were improved in all RE groups,most notably in RE300.The contents of key flavor-active amino acids(e.g.,glutamic acid,glycine)and volatile flavor compounds(e.g.,aldehydes,ketones)were significantly higher in the RE300 and RE600 groups(P＜0.05).In conclusion,supplementing 300 mg/kg rosemary extract effectively improved broiler growth,enhanced antioxidant status,and elevated the nutritional and sensory quality of meat.