蛋鸡阶段控制体重饥饿法强制换羽的研究

Study on the Phase Control of Body Weight by Starvation in Layers

采用阶段控制体重饥饿法对蛋鸡实行强制换羽，体重管理控制在９０％以下维持３３天，８５％以下维持１６天，８５％～７５％维持６天。换羽７５日龄内死亡率２％，第二个产蛋期平均产蛋率６６．７９％，平均蛋重６０．２９ｇ／牧，每只鸡平均产蛋８．５５ｋｇ，纯收入７．０７元。生产性能各项指标明显高于体重下降至７５％开料组和饲喂含２％的高锌饲料组，为养鸡利用第二个产蛋周期提供了实践指导和科学依据。

Abstract Forced molting starving method was used to the layer of phase control body weights and maintined 33 , 1 6 and 6 days to control body weights less than 90% ,85% ,85%～75% respectively. The death rate in 75 days of age after molting was 2%. In second laying period,the average rate of egg production was 66. 79% and the average egg weight was 60.29gper egg,and the average egg produciton was 8. 55kg. All productive performance indices were obviously higher than that the