二氢吡啶对育成鸡生长发育的影响

Effects of diludin on the growth and development of chicks

将275只52日龄海赛克斯父母代育成鸡随机分为5组,分别饲喂含二氢吡啶0、50、100、150、200mg/kg的日粮,测定体重增长情况,放射免疫法测定血清中T3和皮质醇的质量浓度,并记录开产情况。结果表明:在50～150mg/kg水平内,随二氢吡啶添加量的增加,体重和血清中T3水平呈上升趋势,皮质醇水平呈下降趋势,以150mg/kg(Ⅳ组)水平效果显著,添加二氢吡啶37d后,其体重和血清中T3的浓度均极显著高于对照组(P<0 01),皮质醇浓度显著低于对照组(P<0 05),但以200mg/kg(Ⅴ组)水平添加,表现对生长及T3的分泌产生抑制效果。以150mg/kg水平长期添加,在154～160日龄产蛋率达50%,较对照组提前1周。

Two hundred and seventy five 52-day-old Hisex breeding Chickens were randomly divided into five groups and fed with diets containing 0、50、100、150、200 mg/kg diludin respectively to detect their body weight,the concentration of 3,5,3-triiodothyronine(T_3)and cortisol in blood serum by radio immunoassay(RIA)and the age of 50% laying rate.The results showed that:After 37 days of diludin feeding, in 50～150 mg/kg level,the body weight and the content of T3 in blood serum had the tendency of increase,and the concentration of cortisol had the trend of decrease with increasing of added diludin.Diludin could promote growth and development of chicks to some extent, especially at 150 mg/kg level.The body weight and T_3 in serum of group Ⅳ (150 mg/kg) were significantly higher (P<0.01)and the secretion of cortisol was lower than these of control group.Up to 154～160 days old of group Ⅳ,the laying rate was above 50%, and age of first laying was about one week earlier than that of control group.