Goodman B L, Norton R A, Diambra O H
Poult Sci. 1986 Nov;65(11):2008-14. doi: 10.3382/ps.0652008.
The effects of the addition of Zn as ZnO to diets to induce molt were evaluated against a fasted control. Experiment 1 involved 315 Leghorn hens, 15 months old, randomly distributed among five treatments, each replicated seven times with 9 hens per replicate. Hens fasted for 10 days were compared with hens fed diets to which ZnO was added at 10,000, 5,000, or 2,500 ppm for 7, 14, or 21 days. No significant differences were observed among treatments for days to return to 50% production, hen-day and hen-housed production, egg weight, grams egg per hen-day, grams of feed per gram egg, mortality, or Haugh units during the 22-week experimental period. Experiment 2 involved 420 Leghorn hens, 18 months old, randomly distributed among five treatments, each replicated seven times with 12 hens per replicate. Treatments involved fasting for 10 days or feeding diets with 10,000, 5,000, or 2,500 ppm ZnO fed for 7, 14, or 21 days. Hens fasted and hens fed diets with 10,000 ppm ZnO at the start of the experiment ceased production in significantly less time (4.6 to 6 days) than hens fed 5,000 ppm ZnO (14.3 to 14.9 days); however, days to return to 50% production from the start of the experiment did not differ among treatments. Feed consumption and feed cost per hen day during molt were lowest (P less than .05) in the fasted hens.(ABSTRACT TRUNCATED AT 250 WORDS)
评估了在日粮中添加氧化锌（ZnO）诱导换羽的效果，并与禁食对照组进行了对比。实验1使用了315只15月龄的来航蛋鸡，随机分为5个处理组，每个处理组重复7次，每组9只鸡。将禁食10天的蛋鸡与分别添加10000、5000或2500 ppm ZnO并饲养7、14或21天的蛋鸡进行比较。在22周的实验期内，各处理组在恢复到50%产蛋率所需天数、母鸡日产蛋量和入舍母鸡产蛋量、蛋重、每只母鸡日产蛋克数、每克蛋所需饲料克数、死亡率或哈夫单位方面均未观察到显著差异。实验2使用了420只18月龄的来航蛋鸡，随机分为5个处理组，每个处理组重复7次，每组12只鸡。处理方式包括禁食10天或饲喂添加10000、5000或2500 ppm ZnO并饲养7、14或21天的日粮。实验开始时，禁食蛋鸡和饲喂10000 ppm ZnO日粮的蛋鸡停止产蛋的时间显著短于饲喂5000 ppm ZnO日粮的蛋鸡（4.6至6天对比14.3至14.9天）；然而，从实验开始到恢复到50%产蛋率的天数在各处理组之间没有差异。换羽期间，禁食蛋鸡的每只母鸡日采食量和饲料成本最低（P小于0.05）。（摘要截短为250字）
