褐藻寡糖对肉鸡生长性能、肉品质及血清抗氧化能力的影响OA

The experiment was conducted to evaluate the effects of Alginate oligosaccharide(AOS)on growth performance,meat quality and antioxidant index of broilers.384 1-day-old Aiba Yijia broilers with similar initial weight and healthy body condition were randomly divided into 4 groups,with 6 replicates in each group and 16 broilers in each replicate(half male and half female).CON group was fed a basal diet,while AOS-L,AOS-M and AOS-H groups were fed with basal diet supplemented with 50,100 and 200 mg/kg AOS respectively.The experimental period was 42 days.The results showed that:(1)compared with CON group,body weight of all broilers in AOS group was significantly increased on the 21st day,among which AOS-H group was the highest,with an increase of 6.12％(P<0.05);At 42nd day,the body weight of all chickens fed with AOS increased significantly,with the AOS-M group being the highest,increasing by 13.29％(P<0.05).Compared with CON group,on the 1st to 21st day,compared with the control group,the average daily gain of all AOS groups increased significantly,with AOS-H group being the highest,with an increase of 6.46％,which was significantly higher than AOS-L group and AOS-M group(P<0.05).The average daily feed intake of all AOS groups increased significantly(P<0.05).Compared with CON group,at the 22nd to 42nd day,the average daily gain of chickens in all AOS groups increased significantly(P<0.05),the average feed intake in AOS-M and AOS-H groups increased significantly(P<0.05),and the feed-to-weight ratio in AOS groups decreased significantly(P<0.05).Compared with CON group,the average daily gain of chickens in AOS group increased significantly(P<0.05),the highest in AOS-M group(13.53％),the feed-to-weight ratio in AOS group decreased significantly(P<0.05),and the lowest in AOS-M group(8.78％).(2)Compared with CON group,the serum Superoxide dismutase(SOD)in AOS-M group and AOS-H group increased by 7.78％and 7.76％respectively(P<0.05),and the activities of T-AOC(total antioxidant capacity),Glutathione peroxidase(GSH-Px)and Catalase(CAT)were significantly increased(P<0.05),with the highest in AOS-M group(6.46％,9.26％and 15.36％).Serum Malondialdehyde(MDA)of chickens fed with AOS decreased significantly(P<0.05),and AOS-M group was the lowest(4.85％).(3)Compared with CON group,the pH24h values of chest muscle in AOS-M and AOS-H groups were significantly increased by 6.39％and 5.90％respectively(P<0.05),the red degree of chest muscle a* in AOS-M group was significantly increased by 28.33％(P<0.05),and the dripping loss of chest muscle in AOS-M and AOS-H groups was significantly reduced by 37.70％and 30.82％(P<0.05),respectively.To sum up,adding AOS to the diet can effectively improve the growth performance,meat quality and serum antioxidant capacity of broilers.Under this experimental condition,adding 100 mg/kg AOS group has the best effect.