This study aimed to investigate the effects of organic selenium on the growth performance,slaughter performance,meat quality,and antioxidant capacity of broilers.A total of 360 one-day-old Ross 308 broilers were randomly divided into three groups,with six replicates in each group and 20 chickens in each replicate.The Na2SeO3 group,Se-Met group,and Nano-Se group were supplemented with sodium selenite,selenomethionine,and nano selenium at a selenium level of 0.4 mg/kg,respectively.The experimental period was 42 days.The results showed that during the 1～21 d,the feed-to-gain ratio of the Se-Met group was significantly lower than that of the Na2SeO3 group(P＜0.05).The abdominal fat percentage of the Nano-Se and Se-Met groups was significantly lower than that of the Na2SeO3 group(P＜0.05).Compared with the Na2SeO3 group,the a*value of the pectoral muscle in broilers from the Nano-Se group was significantly increased(P＜0.05),and the water-holding capacity of the pectoral muscle in broilers from the Se-Met and Nano-Se groups was significantly increased(P＜0.05).Compared with the Na2SeO3 group,the total antioxidant capacity(T-AOC),superoxide dismutase(T-SOD),and glutathione peroxidase(GSH-Px)activities in the pectoral muscle from the Nano-Se group were significantly increased(P＜0.05),and the malondialdehyde(MDA)content in the pectoral muscle of broilers from the Se-Met and Nano-Se groups was significantly reduced(P＜0.05).The study indicates that organic selenium can effectively improve the growth performance,slaughter performance,meat quality,and antioxidant capacity of broilers,with nano selenium showing better effects than selenomethionine.
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