本研究旨在研究不同产蛋期饲粮半胱胺对蛋黄牛磺酸含量的影响。在Exp中。1、中国农业大学-3(CAU-3)产蛋高峰期(31周龄)的母鸡,探讨日粮中添加0.1%半胱胺对蛋黄牛磺酸含量的影响,鸡蛋质量和生产性能。在Exp.2中,在产蛋后期(68周)使用了两个品种的母鸡(一半的Hy-LineBrown和一半的CAU-3母鸡)来研究添加0,0.02%的日粮的影响,0.04%,蛋黄牛磺酸含量为0.08%或0.10%半胱胺,鸡蛋质量,生产性能和卵巢发育。在Exp.1中,添加0.1%半胱胺的日粮显着增加了蛋黄牛磺酸含量(p<0.05),而对生产性能或鸡蛋质量没有负面影响。在Exp.2中,当半胱胺以0.08%补充时,观察到最高的卵黄牛磺酸含量(p<0.001)。然而,补充半胱胺在饲喂的最初几周线性或二次降低了生产性能,随着继续喂食,效果消失(p<0.05)。总之,这项研究表明,在产蛋高峰期和后期,补充半胱胺对蛋黄牛磺酸的沉积有益,但鸡蛋生产后期的母鸡表现出生产性能和鸡蛋品质下降。
This study aimed to examine the effect of dietary
cysteamine on yolk taurine content in hens during different egg production periods. In Exp. 1,
China Agricultural University-3 (CAU-3) hens at the peak stage of egg production (aged 31 wks) were used to explore the effect of diets supplemented with 0.1%
cysteamine on yolk taurine content, egg quality and production performance. In Exp.2, two breeds of hens (half Hy-Line Brown and half CAU-3 hens) at the late stage of egg production (68 wks) were used to investigate the influence of diets supplemented with 0, 0.02%, 0.04%, 0.08% or 0.10% cysteamine on yolk taurine content, egg quality, production performance and ovary development. In Exp.1, diets supplemented with 0.1% cysteamine significantly increased yolk taurine content (p < 0.05) without negative influence on production performance or egg quality. In Exp.2, the highest yolk taurine content was observed when
cysteamine was supplemented at 0.08% (p < 0.001). However, supplemental
cysteamine linearly or quadratically decreased production performance over the first few weeks of feeding, and the effects disappeared with continued feeding (p < 0.05). In conclusion, this study indicated that cysteamine supplementation benefits yolk taurine deposition in hens at both peak and late stage of egg production, but hens at the late stage of egg production show depressed production performance and egg quality.