Effects of Forsythia suspensa extract on growth performance, nutrient digestibility, and antioxidant activities in broiler chickens under high ambient temperature
Effects of Forsythia suspensa extract on growth performance, nutrient digestibility, and antioxidant activities in broiler chickens under high ambient temperature
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高环境温度下连翘提取物对肉鸡生长性能、养分消化率及抗氧化活性的影响
DOI：
10.3382/ps.2008-00023
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发表时间：
2008-07-01
期刊：
影响因子：
4.4
通讯作者：
Lee, H. S.
中科院分区：
文献类型：
--
作者：
Wang, L.;Piao, X. L.;Lee, H. S.
本试验用252只1日龄、体重38.8 ± 1.3g的肉仔鸡，在高温（32 ± 1 ℃）条件下，研究了连翘提取物对肉仔鸡生长性能、营养物质消化率和抗氧化活性的影响。饲养计划包括从1日龄至21日龄的起始饲料和从22日龄至42日龄的育成饲料。饮食处理包括饲喂不含维生素C或连翘提取物的基于玉米-大豆粉的饮食的阴性对照组（NC）、饲喂具有200 mg维生素C/kg的饮食的阳性对照组和饲喂具有100 mg连翘提取物/kg的测试组（FS）。在研究期间，每个处理组有14个笼子，每个笼子有6只鸡。在整个期间，鸟类可以自由获得食物和水。在第21天和第42天测量体重和摄食量。分别于第21天和第42天采集血液和组织样品，测定抗氧化指标。在启动阶段，处理组之间的生长性能没有差异。在育成阶段，FS组的平均日增重、饲料转化率和能量、粗蛋白、钙和磷的表观消化率显著高于NC组（P < 0.05）。FS组血清总抗氧化能力和超氧化物歧化酶活性显著高于NC组（P < 0.05），而丙二醛活性显著低于NC组（P < 0.05）。FS鸡肌肉超氧化物歧化酶活性显著高于NC鸡（P < 0.05），丙二醛含量显著低于NC鸡（P < 0.05）。在整个试验期间，FS鸡肝脏超氧化物歧化酶活性显著高于NC鸡（P < 0.05）。日粮中添加连翘提取物可能通过降低高温下肉鸡的氧化应激，提高营养物质的消化率和生长性能。
A42-d trial was conducted with 252 broiler chickens (d 1 of age, 38.8 +/- 1.3 g of BW) to determine the effects of Forsythia suspensa extract on growth performance, nutrient digestibility, and antioxidant activities under high ambient temperature (32 +/- 1 C). The feeding program consisted of a starter diet from d 1 to 21 of age and a finisher diet from d 22 to 42 of age. Dietary treatments included a negative control group (NC) fed a corn-soybean meal based diet without vitamin C or Forsythia suspensa extract, a positive control group fed a diet with 200 mg of vitamin C/kg, and a test group (FS) fed with 100 mg of Forsythia suspensa extract/kg. There were 14 cages per treatment and 6 birds per cage during the study. Birds had free access to diets and water during the entire period. Body weight and feed intake were measured at d 21 and 42. Blood and tissue samples were collected at d 21 and 42 for assay of antioxidant indices. Growth performance did not differ among treatment groups during the starter period. In the finisher phase, birds in FS had greater (P < 0.05) average daily gain, feed conversion, and apparent digestibility of energy, CP, calcium, and phosphorus than birds in NC. Furthermore, birds in FS had greater (P < 0.05) total antioxidant capacity and superoxide dismutase activity and lower (P < 0.05) malondialdehyde activity in the serum than birds in NC. The FS birds had greater (P < 0.05) muscle superoxide dismutase activity and lower (P < 0.05) malondialdehyde than NC birds. During the entire period, hepatic superoxide dismutase activity of FS birds was greater (P < 0.05) than that of NC birds. Dietary supplementation with Forsythia suspensa extract can enhance nutrient digestibility and growth performance possibly by reducing oxidative stress of broiler chickens under high ambient temperatures.