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首页> 外文期刊>Agricultural Journal >Evaluation of Some Methods of Forced-Moulting of Laying Birds and Their Effects on Post-Moult Performance and Quality Characteristics of the Post-Moult Eggs
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Evaluation of Some Methods of Forced-Moulting of Laying Birds and Their Effects on Post-Moult Performance and Quality Characteristics of the Post-Moult Eggs

机译：产蛋强迫换羽的几种方法及其对产蛋后性能和品质特性的影响

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Fifty 70 week old brown egg layers were randomly distributed into 5 groups each of 2 replicates of 5 birds each and subjected to some modalities of nutritional deprivation to evaluate the efficacy of such feeding manipulations, to induce moult, and their effect on post moult production and some quality parameters of such eggs. The feeding regimens consisted of feed and water deprivation (FWD), feed deprivation (FD), water deprivation (WD) and feeding zinc in a wheat offal diet. Result revealed that FD treatment before returning the birds to full feeding, was the most effective in inducing moult, followed by the zinc treatment. FWD and WD treatments showed lower degrees of moulting effectiveness, with the WD treatment being the least effective. The moult feeding treatments caused the birds to loose their pretreatment body weights. WD caused the highest body weight loss of 19.35%, followed by zinc and the FD treatments, which caused 16.88 and 15.88% body weight loss respectively. FD treatment caused the highest percentage body weight recovery (BWR) at 1st egg post moult and made the highest body weight gain at 6 weeks, while the zinc group lost body weight at 6 weeks post moult. WD and FWD groups resumed egg production on 17th and 18th days respectively post the moult feeding treatments, while the zinc and FD groups resumed production on the 19th and 21st days respectively. FD group was the first to reach 50% production and had the highest total egg production post moult, while zinc, FWD and WD groups reached 50% production on the 3rd, 4th, and 6th days respectively post moult. Overall, it was concluded that depriving layers of feed, as in this experiment, before returning them to full ad libitum feeding, proved the most effective in inducing moult, increasing egg production post moult, improving egg weight and post moult body weight at 6 weeks compared with the other treatments in the experiment. However, in terms of egg haugh unit value, it was not as good as the birds previously deprived of water before returning them to feed and water ad libitum, as applied in this experiment.
机译：将五十个70周龄的红皮蛋随机分成5组，每组5只鸡进行2次重复试验，并进行某种营养剥夺，以评估这种喂养方法，诱导换羽的功效以及它们对换羽和产蛋的影响。这种鸡蛋的一些质量参数。饲喂方案包括小麦内脏日粮中的饲料和水缺乏（FWD），饲料缺乏（FD），水缺乏（WD）和饲喂锌。结果表明，FD处理在使家禽恢复完全饲喂之前是诱导蜕皮最有效的方法，其次是锌处理。 FWD和WD处理的蜕皮效果较低，而WD处理效果最低。换羽处理使鸡失去了预处理体重。 WD导致最高的体重减轻19.35％，其次是锌和FD治疗，分别导致16.88％和15.88％的体重减轻。 FD处理在换羽后第一个卵引起最高的体重恢复百分比（BWR），在第6周时获得最大的体重增加，而锌组在换羽后6周失去体重。 WD和FWD组分别在换羽处理后的第17和18天恢复产蛋，而锌和FD组分别在第19和21天恢复产蛋。 FD组是第一个达到50％产量的鸡，并且蜕皮后的总卵产量最高，而锌，FWD和WD组分别在蜕皮后的第3、4和6天达到50％的产量。总体而言，得出的结论是，如本实验所述，剥夺饲料层，然后使其完全自由采食，是证明最有效的诱导蜕皮，增加蜕皮后产蛋量，改善蛋重和在6周后的体重的方法与实验中的其他治疗方法相比。但是，就鸡蛋的哈弗单位价值而言，它不如先前在本实验中应用的先断水再自由喂食和饮水的家禽好。

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