نوع مقاله : مقاله پژوهشی
نویسندگان
گروه علوم دامی، دانشگاه آزاد اسلامی واحد قائمشهر ، قائمشهر، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
This study was conducted to evaluate the effects of different selenium sources (inorganic, organic, and nano) and levels of alpha-lipoic acid on growth performance, carcass characteristics, jejunum morphology, and intestinal microbial population of broiler chickens. Four hundred and fifty Ross 308-male broiler chicks were used in 6 treatments with 5 replicates each. The experimental diets were arranged in a completely randomized design with a 2×3 factorial arrangement, including two levels of alpha-lipoic acid in the diet (0 and 300 mg/kg) and three selenium sources: inorganic (sodium selenite), organic (selenomethionine), and nano (nano-selenium). Results showed that chicks fed organic and nano selenium had better feed conversion ratios compared to those fed inorganic selenium (p<0.05). Additionally, supplementation with 300 mg/kg alpha-lipoic acid significantly increased body weight and improved feed conversion ratio in broilers (p<0.05). Addition of nano selenium increased the relative weights of carcass, thigh, bursa and spleen compared with inorganic selenium (P<0.05). Furthermore, the highest weight of spleen was observed in group with combination of nano selenium and alpha-lipoic acid (p<0.05). Morphology of jejunum, consumption of alpha-lipoic acid and nano selenium significantly increased the length and surface area of jejunal villi (p<0.05). The results of microbial population indicated that adding alpha-lipoic acid to the diet increased Lactobacillus population in cecum (p<0.05). Therefore, it is concluded that the use of organic or nano selenium along with alpha-lipoic acid can improve growth performance and gut health in broiler chickens.
کلیدواژهها [English]
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