饲粮中添加膨化亚麻籽和微藻对湖羊血清抗氧化指标和肌肉脂肪酸含量的影响OACSTPCD

This experiment was to compare the effects of dietary extruded flaxseed and microalgae supplementation on serum antioxidant in-dices and fatty acid composition of Hu sheep in order to provide reference for raising the production level of this sheep breed in China.Forty-five healthy Hu sheep aged 4 months with similar body weight were selected and randomly divided into 3 groups with 3 replicates per group,and 5 sheep in each replicate.The sheep of the control group were fed with corn-soybean meal basal diet,and those of the two test groups were fed with basal diet supplemented with 10%flaxseed(Group A)and 5%flaxseed+5%microalgae(Group B),respectively.The exper-iment lasted for 2 months.The results showed as follows:Compared with the control group,the glutathione peroxidase activity in Group A decreased significantly by 28%(P＜0.05).In Groups A and B,the activity of superoxide dismutase reduced significantly,the contents of hydrogen peroxide and malondialdehyde increased(P＜0.05),the content of n-3 polyunsaturated fatty acids in the longissimus dorsi muscle of Hu sheep increased,too(P＜0.05),but the ratio of n-6/n-3(P＜0.05)decreased significantly.In conclusion,the supplementation of extruded flaxseed and microalgae in the diet significantly affected the antioxidant performance of Hu sheep serum and improved muscle n-3 PUFA content and reduced the ratio of n-6/n-3 PUFA.It is suggested that the mixed addition effect of flaxseed and microalgae in actual production is better,at the respective ratio of about 5%.