不同换羽方法对蛋鸡生产性能和组织器官矿物质含量的影响

随机将960只65周龄产蛋率为52 3%的海兰褐商品蛋鸡分为四组。A组(对照组)采用全饥饿法,B组采用阶段控制体重法,C组采用高锌日粮法(2%的氧化锌),D组采用低钙低盐法(Ca:0 09%,Na:0 027%)。结果表明,B组、C组的方法换羽效果好,换羽期死亡率显著(P<0 05)降低;C组胫骨、肝脏中的锌含量还极显著地提高(P<0 01)。D组换羽不成功,换羽后产蛋率、产蛋量和胫骨中的钙、磷含量极显著(P<0 01)降低,换羽后料蛋比和破软蛋率极显著(P<0 01)升高。故作者推荐用阶段控制体重法或高锌日粮法取代全饥饿法诱导换羽。

Effects of Different Methods of Forced Molting on Production Performance and Mineral Content of Tissues in Laying Hens

Nine hundred and sixty HY-Line Brown commercial laying hens which were 65-week-old and 52.3% rate of laying were divided into four groups randomly.Four groups were named A(control), B, C, D and treated with hungry, controlling body weight, high zinc diet (2% zinc oxide) and low-calcium and low-sodium diet (Ca: 0.09%, Na: 0.027%) respectively. The result showed that molting effect of group B and C is better than group A . Their rate of mortality during molting decreased significantly(P<0.05).Zinc content of tibia and liver of group C increased significantly(P<0.01).Group’s D molting is not successful. Its rate of laying and egg production after molting,calcium and phosphorus content of tibia decreased significantly(P<0.01). Its feed/gain ratio and rate of broken and soft eggs increased significantly(P<0.01). It was demonstrated fowl-runner should be replaced the method of hungry by the method of controlling body weight or high zinc diet in the process of molting.