牛磺酸对中后期蛋鸡生产性能的影响

Effect of Taurine on Production Performance in Latter Period Layers

选取378只体质健康的49周龄海赛克斯褐蛋鸡,采用单因子随机化设计,随机分为6组,每组设3个重复,每个重复21只鸡。试验日粮在基础日粮的基础上分别添加牛磺酸0、20、40、80、160、320mg/kg。以试验鸡谷胱甘肽过氧化物酶(GSH-PX)和超氧化物酶的酶(SOD)活性以及甲状腺激素水平(T3、T4)作为血液生化检测指标,以产蛋率、总蛋重、平均蛋重、料蛋比作为生产性能指标,研究牛磺酸对中后期蛋鸡生产性能的影响。结果表明,中后期蛋鸡日粮中添加牛磺酸能显著提高产蛋率、总蛋重,降低平均蛋重、料蛋比(P<0.05),提高蛋鸡全血中GSH-PX、血清中SOD的活性以及提高血清中T3含量,降低T4含量。80mg/kg为中后期蛋鸡日粮中添加牛磺酸的最宜剂量。

Three hundred and seventy-eight healthy Haisaike layers of 49 weeks age were randomly divided into 6 groups with one way random design,each with 3 replications（21 birds per replicate）. The layers were respectively fed the basal diets with supplementation of taurine （0,20,40,80,160,320 mg/kg）,to determine the effect of taurine on production performance. GSH-PX,SOD activities, T3 and T4 contents were used as biochemical indexes,average egg weight,total egg weight,feed intake capacity and feed/egg ratio were used as indexes of production performance. The results showed that： Adding different level taurine to basal diet could increase laying rate,total egg weight and reduce average egg weight, feed/egg ratio （P〈0.05）;It may significantly improve serum SOD activity and glutathione peroxidase （GSH-PX）activity in blood （P〈0.05）;Taurine could significantly increase T3 content and decrease T4 content in serum （P〈0.05）. Dietary taurine level of 80 mg/kg were the most suitable for layers in latter period.