维生素E和C对高温环境中肉鸡生长及血液甲状腺激素浓度的影响

Effect of Vitamin E and C on the Growth and Level of Plasma Thyroid Hormone of Broilers Reared in High Ambient Temperature

将 18 0只AA肉公鸡分成 6组 ,Ⅰ组为 2 0～ 2 3℃对照组 ,Ⅱ、Ⅲ、Ⅳ、Ⅴ、Ⅵ组为 33℃高温试验组 Ⅰ、Ⅱ组饲喂基础日粮 ,Ⅲ、Ⅳ、Ⅴ、Ⅵ组分别在基础日粮中添加 2 5 0mg/kg维生素E、12 5mg/kg维生素E、12 5mg/kg维生素E +2 5 0mg/kg维生素C、2 5 0mg/kg维生素C ,研究高温条件下不同剂量的维生素E和C对肉鸡生产性能、血液甲状腺激素水平的影响 结果表明 :日粮中添加维生素E、C能提高高温环境中肉鸡的采食量 (m料)、饮水量 (m水)、体增重(Δm体)和饲料转化率 (m料/Δm体) ,其中Ⅲ和Ⅴ组效果最明显 添加维生素E、C能调节肉鸡血清T3、T4 浓度在一定范围波动 维生素E。

A total of 180 male broilers were divided into six groups and placed in two ambient temperatures: 20～23℃(Ⅰ) and 33℃(Ⅱ,Ⅲ,Ⅳ,Ⅴ,Ⅵ). GroupⅠandⅡwere provided with basal diets while group Ⅲ,Ⅳ,Ⅴ,Ⅵ were fed different levels of vitamins in the basal diet respectively: 250 mg/kg vitamin E(V E), 125 mg/kg V E , 125 mg/kg V E+250 mg/kg vitamin C (V C) and 250 mg/kg V C . The trial was conducted to study the effect of different levels of V E and V C on growth and level of plasma thyroid hormone of broilers reared in high ambient temperature. The results showed that V E and V C increased feed intake, water consumption, weight gain, and decreased feed to gain ratio, especially in group Ⅲ andⅤ.The vitamins regulated concentrations of serum T 3 and T 4 to fluctuate within a certain range . V E and V C could operate synergistically to resist high temperature stress in broilers.