Effects of nano-selenium on growth performance and meat quality of AA broilers
The experiment was conducted to study the effects of nano-selenium on the growth performance and meat quality of AA broilers.A total of 480 one-day-old AA broilers were randomly divided into three groups,with each group having eight replicates and each replicate consisting of 20 broilers.The control group was supplemented with 0.4 mg/kg sodium selenite in the basal diet,while the experimental group 1 was supplemented with 0.3 mg/kg nano-selenium,and the experimental group 2 was supplemented with 0.5 mg/kg nano-selenium.The trial lasted for 42 days.The results showed that at 22 to 42 days of age,compared with the control group,the average daily feed intake of broilers in the group 1 and group 2 significantly decreased(P＜0.05),and the feed-to-gain ratio of the group 2 significantly decreased(P＜0.05).The meat redness(a*value)of the group 2 significantly increased(P＜0.05),and the shear force of the pectoral muscle in the group 1 and group 2 significantly decreased(P＜0.05).Compared with the control group,the activity of glutathione peroxidase(GSH-Px)in the pectoral muscle of the group 2 broilers significantly increased(P＜0.05),and the activity of total superoxide dismutase(T-SOD)in the pectoral muscle of broilers in the group 1 and group 2 significantly increased(P＜0.05).Compared with the control group,the expression of nuclear factor erythroid 2-related factor 2(Nrf2)in the pectoral muscle of broilers in the group 2 significantly decreased(P＜0.05),the expression of quinone oxidoreductase 1(NQO1)in the pectoral muscle was significantly increased(P＜0.05),the expression of glutathione peroxidase 1(GPX1)and heme oxygenase-1(HO1)in the pectoral muscle of broilers in the group 1 and group 2 significantly increased(P＜0.05).The study indicates that the addition of nano-selenium in the diet can improve the antioxidant capacity of the muscle and the meat quality of AA broilers,with the 0.5 mg/kg supplementation showing superior effects.
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