Albumen Quality of Eggs Laid During Molt Induction
Albumen Quality of Eggs Laid During Molt Induction
复制标题
蜕皮诱导过程中产蛋的蛋白质量
DOI：
10.3382/ps.0591711
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发表时间：
1980
期刊：
影响因子：
4.4
通讯作者：
J. O. Nordstrom
中科院分区：
文献类型：
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作者：
J. O. Nordstrom
本试验对63周龄单梳白色来航蛋鸡换羽诱导期和换羽后立即复产的鸡蛋进行了蛋白质品质测定。第一个试验用1165只蛋鸡，每笼5 ~ 6只。从停饲前16天开始，将光照限制在16 L：8 D至8 L：16 D。停止饲料7天，自由饮水，然后饲喂谷物或12%蛋白质糊状物21天。然后，所有母鸡饲喂正常产蛋日粮，并将光照增加到16 L：8D。第二个试验利用588只蛋鸡在单独的笼子里。从蜕皮诱导的第一天开始，将光照限制在16 L：8D至8L：16 D，持续6天。通过停饲6天或通过饲喂含有20，000 ppm Zn（来自ZnO）的产蛋醪6天来诱导蜕皮。动物可自由饮水。然后所有母鸡都喂以正常的产蛋日粮。在这两个实验中，蛋白质量（哈夫单位）显着增加，在蜕皮诱导过程中所产的鸡蛋，出现早在饲料撤出后的第二天。在产卵后立即蜕皮，蛋白质的质量是更好的比之前观察到的蜕皮诱导，但不如看到在蜕皮诱导过程中产卵。
Abstract Two experiments were conducted on 63-week-old Single Comb White Leghorn laying hens to determine the albumen quality of eggs laid during molt induction and those laid immediately upon resumption of lay following the molt. The first experiment utilized 1165 laying hens in group cages with 5 to 6 hens per cage. Light was restricted from 16L:8D to 8L:16D beginning 16 days prior to feed withdrawal. Feed was withheld for 7 days, with water available ad libitum, followed by feeding grain or a 12% protein mash for 21 days. Then, all hens were fed their normal laying ration and light was increased to 16L:8D. The second experiment utilized 588 laying hens in individual cages. Light was restricted from 16L:8D to 8L:16D for 6 days, beginning on the first day of molt induction. A molt was induced cither by feed withdrawal for 6 days or by feeding laying mash containing 20,000 ppm Zn (from ZnO) for 6 days. Water was available ad libitum. All hens then were fed their normal laying ration. In both experiments, albumen quality (Haugh units) increased dramatically in the eggs laid during molt induction, appearing as early as the second day after feed withdrawal. In eggs laid immediately following the molt, albumen quality was better than that observed just prior to molt induction but was not as good as that seen in eggs laid during molt induction.