Effect Of Astaxanthin On Production Performance,Egg Quality,Antioxidant Capacity And Immunity Of Taihang Chicken

Different levels of astaxanthin were added to the diet to study the effects on the performance,egg quality,antioxidant capacity and immunity of Taihang chicken,and the appropriate addition amount of astaxanthin was determined to provide scientific basis for Taihang chicken production.A total of 315 Taihang chickens of 510 days old were randomly divided into 5 groups,with 3 replicates in each group and 21 chickens in each replicate.Diets supplemented with astaxanthin at 0,40,60,80 and 100 mg/kg were fed separately.The pre-test period is 1 week and the trial period is 8 weeks.The results show: 1.The daily intake of the 80 mg/kg astaxanthin group was significantly higher than that of the 40 mg/kg group(P<0.05).The ratio of eggs to eggs was the lowest,12.97% lower than the control group(P<0.05).The egg production rate was the highest,18.45% higher than the 100mg/kg group(P<0.05),and 15.06% higher than the control group(P<0.05).The average egg weight difference between the groups was not significant(P>0.05),but the addition of astaxanthin increased the average egg weight of Taihang chicken.2.At the 32 nd day of the experiment,the Haem's unit of astaxanthin was the highest in the 80 mg/kg group,which was 16.43% higher than the control group,40 mg/kg and 60 mg/kg,respectively(P<0.05)and 11.37%(P<0.05).There was no significant difference between the control group and the 100 mg/kg group(P>0.05).0.05),17.78%(P<0.05),and the difference between the other groups was not significant(P>0.05).There was no significant difference in egg shape index,eggshell thickness and eggshell strength between the groups during the test period(P>0.05).The color of egg yolk in the astaxanthin group was significantly higher than that in the control group at 32 days and 56 days after the test(P<0.05).The color of the egg yolk was the deepest in the 100 mg/kg astaxanthin group,but not significantly different from the 80 mg/kg group.(P>0.05).3.The apparent metabolic rate of calcium in the 80mg/kg group was the highest,which was 36.40% higher than that in the 100mg/kg group and the control group(P<0.05)and 5.78%(P<0.05).The apparent metabolic rate of crude protein in the 80 mg/kg group was 8.41%(P<0.05),12.10%(P<0.05),and 5.51% higher than that of the control group,40 mg/kg group,60 mg/kg group,and 100 mg/kg group,respectively.<0.05),13.09%(P<0.05).The apparent metabolic rates of phosphorus and coarse ash were not significantly different between the groups(P>0.05).4.Malondialdehyde in the astaxanthin group was significantly lower than that in the control group(P<0.05),among which the 80 mg/kg group was the lowest,which was 42.11% lower than the control group,40 mg/kg group and 100 mg/kg group(P<0.05).26.01%(P<0.05)and 18.32%(P<0.05).Superoxide dismutase in the 80 mg/kg group was 88.73%(P<0.05),43.97%(P<0.05),26.04%(P<0.05),and 60 mg,respectively,compared with the control group,40 mg/kg group,and 100 mg/kg group.There was a trend of increase in the /kg group(P>0.05).Glutathione peroxidase in the 80 mg/kg group was significantly higher than the other groups(P<0.05),54.42% higher than the control group(P<0.05).The total antioxidant capacity of the astaxanthin group was significantly higher than that of the control group(P<0.05).The total antioxidant capacity of the 80mg/kg group was the highest,which was 169.14% higher than the control group(P<0.05).5.The serum levels of IgA,IgM and IgG in the 80 mg/kg group were the highest,which were significantly higher than those in the other groups(P<0.05),which were 71.98% higher than the control group(P<0.05)and 31.13%(P<0.05).64.54%(P < 0.05).6.The serum albumin of the astaxanthin group was significantly higher than that of the control group(P<0.05),and the highest in the 80mg/kg group,which was 46.52% higher than the control group(P<0.05).The total protein in the 40mg/kg group,60mg/kg group and 80mg/kg group was significantly higher than that in the control group(P<0.05),and the highest in the 80mg/kg group,which was 40.67% higher than the control group(P<0.05).The lysozyme in the 80 mg/kg group was significantly higher than the other groups(P<0.05),which was 28.91% higher than the control group(P<0.05).There was no significant difference in lactic acid and lactate dehydrogenase between the groups(P>0.05).In summary,it is concluded that the addition of 80 mg/kg astaxanthin to the diet is the best for improving the performance of Taihang chicken,improving egg quality,promoting the apparent metabolic rate of nutrients,enhancing the body's antioxidant performance and improving immune function.