不同剂量的半胱胺对产蛋后期蛋鸡生产性能的影响

目的]探讨不同添加剂量的半胱胺(CS)对产蛋后期蛋鸡生产性能及激素水平的影响,摸索最适添加剂量。方法]选择来源相同,43周龄产蛋后期花凤鸡576只,随机分为6组(n=96),每组3个重复。即Ⅰ组(空白对照组)、Ⅱ组(CS:100mg/kg)、Ⅲ组(CS:150mg/kg)、Ⅳ组(CS:200mg/kg)、Ⅴ组(CS:250mg/kg)、Ⅵ组(CS:300mg/kg)。试验期为21d,分别在试验开始后的第1、8、15、22天采样,进行料蛋比、产蛋率、血清激素水平的检测。结果]试验结果显示CS降低了产蛋后期蛋鸡的料蛋比、提高了产蛋率并缓解了雌激素水平的骤降。结论]CS对产蛋后期蛋鸡生产性能及雌激素水平的降低具有一定的缓解作用。

Effects of Different Doses of Cysteamine on Production Performance of Hens during Late Laying Period

Objective] The aim was to investigate the effects of different doses of cysteamine(CS) on the production performance and hormone levels of hens during late laying period to find out the most appropriate adding dose.Method] 576 43-week old broilers from the same source were randomly divided into 6 treatments(n=96) with 3 replicates,among them groupⅠ,as the control group,was provided with basic diet,while group Ⅱ,Ⅲ,Ⅳ,Ⅴ and Ⅵ were fed with basic diet supplemented with cysteamine at the level of 100,150,200,250 and 300 mg/kg,respectively.The experimental period was 21 days,and the laying rate,ratio of feed to egg and hormone levels of serum were detected on the 1st,8th,15th and 22th day.Result] The cysteamine degraded the ratio of feed to egg,raised the laying rate,and eased the slump of the estrogen level.Conclusion] Cysteamine can relieve the fall of production performance and estrogen level of hens during late laying period.