产蛋鸡饥饿法强制换羽效果分析

Effects of mandatory molting by starvation on the egg laying rate in laying hens

[目的]了解饥饿法强制换羽技术对产蛋鸡产蛋率的影响,为蛋鸡养殖户实施饥饿法强制换羽工作提供技术支撑。[方法]选取一批456日龄的蛋鸡6000羽为试验Ⅰ组,500羽为试验Ⅰ组对照组;另一批是296日龄、产蛋率不明原因下降明显的蛋鸡6000羽为试验Ⅱ组,500羽为试验Ⅱ组对照组。进行饥饿法强制换羽试验,通过称质量测定强制换羽期间试验鸡的体质量变化情况,并记录每天产蛋数量分析产蛋率变化。[结果]停料第7天,鸡群停止产蛋,第15天时试验Ⅰ组增重率为−29.12%,试验Ⅱ组增重率为−30.21%,符合恢复喂料的标准要求;恢复喂料后第7天鸡群开始产蛋,第13天产蛋率迅速提升,第19天产蛋率达50.00%以上,第47天试验Ⅰ组产蛋率达87.88%,提升到高峰;第39天试验Ⅱ组产蛋率达89.84%,提升到高峰;产蛋率高峰可维持150 d以上。[结论]饥饿法强制换羽可有效提高产蛋鸡的产蛋率,延长蛋鸡的产蛋期,提高蛋鸡养殖经济效益,特别是对产蛋率在不明原因情况下明显下降的蛋鸡效果更好。

[Objectives]The effects of mandatory molting by starvation on the egg laying rate in laying hens was studied to provide technical support for farmers of laying hens to implement mandatory molting by starvation in laying hens.[Methods]A batch of 6000 laying hens aged 456 days was used as the experimental groupⅠ,and 500 hens as the control group for experimental groupⅠ.The other batch of 6000 laying hens aged 296 days with a significant decrease in egg laying rate for unknown reasons was used as the experimental groupⅡ,and 500 hens as the control group for experimental groupⅡ.The experiment of mandatory molting by starvation was conducted.changes in body weight of experimental chickens during mandatory molting were measured by weighing the body weight.The daily quantity of egg laying was recorded to analyze the changes in egg laying rate.[Results]The laying hens stopped laying eggs on the 7th day of feeding cessation.The weight gain rate of experimental groupⅠandⅡwas−29.12%and−30.21%on the 15th day,which met the standard requirements for resuming feeding.The laying hens began to lay eggs on the 7th day after resuming feeding.The egg laying rate increased rapidly on the 13th day.The egg laying rate reached over 50.00%on the 19th day.The egg laying rate in the experimental groupⅠreached its peak on the 47th day,with 87.88%.The egg laying rate in the experimental groupⅡreached its peak on the 39th day,with 89.84%.The peak of egg laying rate lasted for more than 150 days.[Conclusions]The mandatory molting by starvation can effectively increase the egg laying rate in laying hens,prolong the period of laying egg in laying hens,and improve the economic benefits of farming laying hens,especially for laying hens whose egg production rate significantly decreases for unknown reasons.The effect is better especially for laying hens with significant decrease in egg laying rate for unknown reasons.