Hy-line brown-egg-shell layers with the largest commercial market share in China were used as test materials,one-day-old layers were treated by the Nova-Tech infrared beak trimmer at different debeaking modules and intensities and compared with those without beak trimming and those at age 7 days treated conventionally by hot-blade debeaking,and the performance data for different-group layers to grow and lay eggs were regularly collected and statistically analyzed.The results showed again that a correct beak trimming,especially an improved infrared beak trimming,could enhance the performance of layers in laying period,and the layers of infrared shallow beak trimming performed better in laying rate,mortality and feather coverage before elimination.So infrared shallow beak trimming was more suitable for Hy-line brown-egg-shell layers in an environment-control poultry house.%选择国内饲养量最大的海兰褐壳商品蛋鸡为试验材料,采用Nova-Tech红外断喙器不同断喙模块和强度对鸡只进行1日龄断喙处理,同时以不断喙和传统7日龄热刀断喙为对照组,定期收集产蛋期蛋鸡不同组别鸡只生长和生产性状数据进行统计分析.本研究再次验证了正确恰当的断喙尤其是红外断喙方式对鸡只产蛋期性能有提高作用,尤其是红外浅断喙组(IB2)的鸡群在产蛋率、死淘率以及淘汰前的羽毛覆盖程度上表现更为优秀.在密闭式鸡舍中,红外浅断喙模式是海兰褐蛋鸡更加适用的断喙模式.
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