Effect of supplementing feed with oregano and/or α-tocopheryl acetate on growth of broiler chickens and oxidative stability of meat
Effect of supplementing feed with oregano and/or α-tocopheryl acetate on growth of broiler chickens and oxidative stability of meat
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DOI：
10.22358/jafs/67120/2005
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发表时间：
2005-01-01
影响因子：
1
通讯作者：
Spais, AB
中科院分区：
文献类型：
--
作者：
Giannenas, IA;Florou-Paneri, P;Spais, AB
本试验旨在研究饲粮中添加牛至和/或α -生育酚乙酸对肉鸡生长性能及胸、腿肉氧化稳定性的影响。试验选取6300只1日龄Cobb-500鸡，随机分为7个组，每组公、母各150只。其中1组在基础饲粮中添加30 mg -生育酚/kg饲料（阴性对照组），其余6组在基础饲粮中添加5 g/kg （OR5组）和10 g/kg （OR10组）的脱水牛至，5或10 g/kg的脱水牛至加170 mg/kg的α -生育酚乙酸（OR5-TOC组和OR10-TOC组），170 mg/kg的a-生育酚乙酸（TOC组）。黄霉素4 mg/kg + lasalacid 75 mg/kg （FLA-LAS阳性对照组）。饲养42 d后，体重、日增重和饲料系数表明，5 g/kg水平的牛至叶单独添加或与a-生育酚醋酸酯联合添加均可替代经批准的饲料添加剂黄霉素和甲沙酸，具有促进生长的作用。与对照组相比，饲料中添加牛至叶降低了肉样品中丙二醛的含量，其中添加5 g/kg的牛至叶比添加10 g/kg的牛至叶更能有效地延缓脂质氧化。牛至的抗氧化活性不如a-生育酚酯，而5 g/kg牛至与a-生育酚酯组合的抗氧化活性高于单独添加或与10 g/kg牛至联合添加的a-生育酚酯。与胸肉相比，大腿肉样本更容易被氧化，尽管胸肉含有的a-生育酚含量明显较低。
An experiment was carried out to examine the effect of supplementing feed with oregano and/or alpha-tocopheryl acetate on growth performance of broiler chickens and the oxidative stability of breast and thigh meat. A total of 6300 one-day old Cobb-500 chickens were randomly allocated into 7 equal groups with three subgroups of 150 males and 150 females each. One of the groups was given a basal diet containing 30 mg alpha-tocopheryl acetate/kg feed (negative control group), whereas the other six groups were administered the basal diet supplemented further with dehydrated oregano plants at 5 g/kg (OR5 group) and 10 g/kg (OR10 group), dehydrated oregano plants at 5 or 10 g/kg plus 170 mg/kg alpha-tocopheryl acetate (OR5-TOC and OR10-TOC group, respectively), a-tocopheryl acetate at 170 mg/kg (TOC group), and flavomycin at 4 mg/kg plus lasalocid at 75 mg/kg (FLA-LAS positive control group). After 42 days of feeding, values of body weight, daily weight gain and feed conversion ratio showed that oregano given as single supplement at the level of 5 g/kg or in combination with a-tocopheryl acetate could serve as an alternative to the approved feed additives flavomycin and lasalocid, exerting a growth-promoting effect. Feed supplementation with oregano decreased malondialdehyde values in meat samples compared with the control, the supplementation level of 5 g/kg being more effective in retarding lipid oxidation compared with 10 g/kg. The antioxidant activity offered by oregano was, however, inferior to that exhibited by a-tocopheryl acetate supplementation, while the antioxidant activity presented by the combination of 5 g/kg oregano and a-tocopheryl acetate was higher than that presented by a-tocopheryl acetate when supplemented alone or in combination with 10 g/kg oregano. Thigh meat samples were found to be more susceptible to oxidation compared with breast meat, although the latter contained a-tocopherol at markedly lower levels.