Abstract: This study aimed to evaluate the antioxidant activity of water and alcohol extracts of soybean meal andwas better than that of soybean meal（P<0.05）. The weight gain rate，feed??gain ratio，hepatosmatic index，and meat?? fat ratio of dietary supplement with fermented soybean meal group were better than those of the control group，and 2.5% group was the best. fermented soybean meal，and its efffects on growth performance and feed efficiency of Lates calcarifere. For animal experiments，Lates calcarifer in 4 groups were fed the basal diet supplement with 0%（control group），0.5%，1.25%， and 2.5% fermented soybean meal，with 5 replicates per group and 10 fish per replicate. Natural light was used in feeding environment and the temperature was kept at 25~40 ℃，feeding twice daily（9:00 and 18:00）until full for 12 weeks. The results showed that DPPH scavenging rate of water extract and alcohol extract of fermented soybean meal

Key words: Fermented soybean meal； Lates calcarifer； Antioxidant Activity； DPPH scavenging rate Growth performance

摘要： 为研究益生菌发酵豆粕抗氧化活性和对尖吻鲈生长性能、饲料效率的影响，以豆粕 和发酵豆粕的水提物、醇提物为试验对象，测定其DPPH自由基的清除率；将发酵豆粕分别以 0%（对照组）、0.5%、1.25%、2.5%添加至尖吻鲈饲料，每组5个重复，每个重复10尾尖吻鲈鱼 苗，采用自然光照，温度保持在26.5—30.5 ℃，每天两次（9:00和 18:00）饲喂至饱食，共饲养12 周。结果显示：发酵豆粕的水提物和醇提物的DPPH清除率优于豆粕；各添加组的增重率、饲料 系数、肝体比和肌肉脂肪含量结果均优于对照组，且以2.5%的添加量为最优。

关键词: 发酵豆粕； 尖吻鲈； 抗氧化活性； 生长性能