【摘 要】
：
以肥肝型种鹅为研究对象,研究缩短鹅换羽期的方法,以解决种鹅季节性繁殖、年产蛋量低的技术难题.采用完全随机设计,选取24月龄青农灰鹅128只,饲喂2％氧化锌日粮,按照目标体重下
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以肥肝型种鹅为研究对象,研究缩短鹅换羽期的方法,以解决种鹅季节性繁殖、年产蛋量低的技术难题.采用完全随机设计,选取24月龄青农灰鹅128只,饲喂2％氧化锌日粮,按照目标体重下降0(对照组)、20％(第1组)、25％(第2组)、30％(第3组)进行分组设计,对羽毛脱落速度、体重及产蛋率进行统计并比较分析.结果显示:①拔毛前,主翼羽和副主翼羽脱落量,第3组极显著高于第1组和对照组(P＜0.01),与第2组差异不显著(P＞0.05)；②达到目标体重所需的时间,第3组极显著多于对照组(P＜0.01),显著多于第1组(P＜0.05),与第2组差异不显著(P＞0.05)；③第3组的开产日龄,极显著早于第1组和对照组(P＜0.01),与第2组差异不显著(P＞0.05)；达到32％产蛋率时的换羽日龄,第3组显著早于第1组(P＜0.05),极显著早于对照组(P＜0.01),与第2组差异不显著(P＞0.05)；④试验期间的死淘率,第3组极显著高于第1组和对照组(P＜0.01),显著高于第2组(P＜0.05)；⑤血液中微量氧化锌变化可以减少鹅采食量.表明,肥肝型种鹅饲喂13d添加2％氧化锌的日粮,体重下降25％的诱导换羽方法,死淘率较低,能够缩短换羽期,提高年产蛋量.
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