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首页> 美国卫生研究院文献>The Journal of Poultry Science >Effects of Dietary Nano-Selenium Supplementation on Growth Performance Antioxidative Status and Immunity in Broiler Chickens under Thermoneutral and High Ambient Temperature Conditions
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Effects of Dietary Nano-Selenium Supplementation on Growth Performance Antioxidative Status and Immunity in Broiler Chickens under Thermoneutral and High Ambient Temperature Conditions

机译：膳食纳米硒补充对热电因和高环境温度条件下肉鸡鸡生长性能抗氧化状态和免疫的影响

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The objective of the present study was to examine the effects of nano-selenium on growth performance, antioxidative status, and immune function in broiler chickens reared under thermoneutral (22±1°C) or high ambient temperature (35±1°C) conditions. Thirty-six broiler chicks at 15d old were randomly divided into 6 treatments in a 3×2 factorial design. The main factors included the dietary supplementation (basal diet without Se supplementation [control], basal diet with 0.3 mg of nano-elemental Se per kilogram of diet [nano-Se], and basal diet with 0.3 mg of sodium selenite per kilogram of diet [SSe]) and the ambient temperature challenge (22±1°C or 35±1°C). The birds were given the experimental diets from 15 to 30 d of age. High ambient temperature significantly depressed body weight gain, feed intake, feed conversion ratio, breast muscle weight, and abdominal fat weight, while feeding nano-Se clearly alleviated these negative effects of high ambient temperature. In addition, feeding nano-Se increased glutathione peroxidase mRNA expression in liver and alleviated the negative effects of high ambient temperature via reducing the malondialdehyde content in liver and breast muscle. Furthermore, feeding nano-Se increased mRNA expression of cytokine genes (interleukins 2 and 6) under both thermoneutral and high ambient temperature conditions. Under both thermoneutral and high-temperature conditions, broiler chickens fed nano-Se had higher Se and vitamin E concentrations in breast muscle than broiler chickens fed the control diet. In contrast, feeding SSe at the same dose as nano-Se did not alleviate the negative effects of high ambient temperature on broiler chickens. In conclusion, dietary supplementation with nano-Se at 0.3 mg/kg diet might enhance growth performance by improving antioxidative or immune properties in broilers reared under high ambient temperature.
机译：本研究的目的是研究纳米硒对在热源（22±1°C）或高环境温度（35±1°C）条件下饲养的肉鸡鸡中生长性能，抗氧化状态和免疫功能的影响。在15D旧的肉鸡小鸡在3×2因子设计中随机分为6种治疗方法。主要因素包括膳食补充剂（没有SE补充[控制]的基础饮食，每千克饮食纳米元素SE的基础饮食，每公斤饮食0.3毫克硒钠为0.3mg饮食[SSE]）和环境温度挑战（22±1°C或35±1°C）。将鸟类从15至30天赋予实验饮食。高环境温度显着抑制体重增加，进料摄入，进料比，乳房肌肉重量和腹部脂肪重量，同时喂养纳米-SE清楚地减轻了这些高环境温度的负面影响。此外，饲喂纳米-SE的谷胱甘肽过氧化物酶mRNA表达在肝脏中，并通过降低肝脏和乳房肌肉中的丙二醛含量来缓解高环境温度的负面影响。此外，在热和高环境温度条件下喂养纳米-SE增加的细胞因子基因（白细胞介素2和6）的mRNA表达。在热管和高温条件下，喂养纳米-SE的肉鸡鸡在乳房肌肉中具有较高的SE和维生素E浓度，而不是饲喂对照饮食的肉鸡。相比之下，以与纳米-SE相同的剂量的喂养SSE并未缓解高环境温度对肉鸡的负面影响。总之，通过0.3mg / kg饮食的膳食补充剂可以通过改善在高环境温度下饲养的肉鸡中的抗氧化或免疫特性来提高生长性能。

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