大豆异黄酮对樱桃谷鸭生长的影响

选用健康的1日龄樱桃谷鸭128只,随机分为4组,其中1组为对照组(基础日粮),其它3组试鸭在喂基础日粮的基础上加入不同剂量的大豆异黄酮,其添加水平分别为5、101、5 mg/kg.在21日龄和42日龄,将试鸭屠宰后测定血清和肌肉的相关指标.结果表明:在1~3周龄,大豆异黄酮5 mg/kg和10 mg/kg添加组樱桃谷公鸭血清羟脯氨酸的含量显著高于对照(P<0.05),10 mg/kg剂量添加组,肝脏DNA含量显著高于对照组,RNA/DNA降低(P<0.05).15 mg/kg添加组樱桃谷公鸭血清羟脯氨酸含量显著增加(P<0.05),樱桃谷母鸭肝脏和胸肌DNA含量显著降低(P<0.05).其它指标与对照组相比差异不显著(P>0.05),性别差异不显著.在4~6周龄,10 mg/kg大豆异黄酮添加组樱桃谷母鸭血清总蛋白含量显著降低,5 mg/kg添加组樱桃谷公鸭血清羟脯氨酸含量显著增加(P<0.05),其他指标与对照组差异均不显著(P>0.05).由此可见,大剂量大豆异黄酮对樱桃谷鸭的生长不利,尤其对幼龄樱桃谷鸭生长影响更大.

Effects of soybean isoflavones on growth of cherry valley duck

128 of Cherry Valley Duck in good health and 1 day old were allocated into 4 groups as control group(basic diet),basic diet 5 mg/kg of soybean isoflavone(SIF),basic diet 10 mg/kg and 15 mg/kg of SIF respectively.The tested ducks were slaughtered after 21 and 42 days of feed to determine some parameters in blood and muscle.Results showed that SIF at 5 and 10 mg/kg increased the content of hydroxyproline in blood of male duck(P<0.05) before 3 weeks old.SIF at 10 mg/kg increased the content of DNA in liver(P<0.05),decreased the rate of RNA/DNA(P<0.05).SIF at 15 mg/kg increased the content of hydroxyproline of male duck(P<0.05);however,decreased the content of DNA both in liver and chest muscle(P<0.05),the difference of RNA was not significant(P>0.05).No difference was found for parameters in sex(P>0.05).After 3 weeks,except SIF at 5 mg/kg increased the content of hydroxyproline of male duck and SIF at 10 mg/kg decreased the content of total protein in blood(P<(0.05)),there was no difference in other parameters compared with the control(P>0.05).It suggested that SIF at high dose inhabited the growing of ducks to some degree,especially to the young duck(before 3 weeks old).