【摘要】 选用44周龄海兰褐商品蛋鸡208只,随机分为4组,分别在基础日粮中添加大豆黄酮0、5、10和15mg/kg,研究了日粮中添加不同水平大豆黄酮对不同时期产蛋鸡生产性能及相关激素水平、血液生化指标及激素分泌的影响。结果表明:添加大豆黄酮在试验各期均可以提高产蛋率、改善料蛋比,15mg/kg组可以显著提高日产蛋量;10和15mg/kg组可以显著提高游离三碘甲状腺原氨酸(FT3)水平,极显著提高游离甲状腺素(FT4)水平;5mg/kg组极显著降低血清IGF-1含量,15mg/kg组极显著提高血清IGF-1含量,各处理组血清胰岛素水平均极显著高于对照组;随着大豆黄酮添加量的增加,血清总胆固醇、甘油三酯、血清低密度脂蛋白胆固醇、血清高密度脂蛋白胆固醇、血糖、血清尿酸呈递减趋势。大豆黄酮可以明显改善44-56周龄海兰褐蛋鸡的生产性能、内分泌激素水平,并降低血液中胆固醇含量。更多还原

【Abstract】 To evaluate the effects of daidzein on the production performance,blood parameter and the level of hormone secretion in laying hens,208 laying hens of 44 weeks old were divided randomly into four groups of fifty two each.Control group was fed basal diet.5,10 and 15mg/kg of daidzein were added to the basal diet for the other three groups,respectively.At the fourth,eighth and twelfth week,the effects of daidzein on the levels of growth,hormone and physio-biochemical parameters’ levels in laying hens were measured.The main results showed the percentage of egg was increased and feed/egg ratio was improved in the different periods of the experiment;The daily egg mass in 15 mg/kg group was significantly increased in the different periods of the experiment;The free triiodothyronine（T₃） level in 10 and 15 mg/kg group were significantly increased（P<0.05） in the different periods of the experiment and the free thyroxine（T₄） level were significantly increased（P<0.01）;With the increase of daidzein supplement,the concentration of serum total cholesterol （TC）,triglyceride,low density lipoprotein-cholesterol（LDL-C）,high density lipoprotein-cholesterol（HDL-C）,glucose and uric acid was decreased by degrees;content of serum IGF-1（P<0.01） was decreased significantly in 5mg/kg group and,content of serum IGF-1（P<0.01） was increased significantly in 15mg/kg group;The content of serum insulin in each treatment group was significantly higher（P<0.01） than that in control group.Daidzein can improve the production performance,the level of hormone secretion and decrease the content of cholesterol of blood in laying hens of 44 weeks old.更多还原