Mansoori Behzad, Modirsanei Mehrdad, Farkhoy Mohsen, Kiaei Mohammad-Mehdi, Honarzad Jila
Department of Animal and Poultry Health and Nutrition, Faculty of Veterinary Medicine, University of Tehran, PO Box 14155-6453, Tehran, IR Iran.
J Sci Food Agric. 2007 Nov;87(14):2555-9. doi: 10.1002/jsfa.2939.
An investigation was carried out to assess the possibility of using single dietary sources as alternatives to feed deprivation for the induction of moult in commercial laying hens. The study involved six dietary groups of 29 laying hens: unmoulted, dried tomato pomace, alfalfa meal, rice bran, cumin seed meal and feed withdrawal. The birds received the above diets during the moulting period (11 days), and body weight loss and ovary weight regression were measured. Post-moult production parameters (number of eggs produced per hen per day, egg weight, shell weight, yolk colour and Haugh unit) were measured for 12 weeks. Results showed that all dietary sources were as effective as feed withdrawal in causing ovary weight regression in birds. Birds provided with tomato pomace or alfalfa showed lower weight losses than feed-deprived birds at the end of the moulting period. Hens moulted by tomato pomace or alfalfa exhibited post-moult levels of egg production over a 12 week period that were superior to those of hens moulted by feed withdrawal. Post-moult eggs laid by hens moulted by all dietary sources were of comparable quality to eggs from feed-deprived hens and superior to those from unmoulted hens. As fibrous feeds with low metabolisable energy and an appreciable amount of protein, dried tomato pomace and alfalfa meal may be fed to hens on an ad libitum basis for effective moult induction while reducing the stress of severe starvation and retaining comparable egg quality and production. Copyright © 2007 Society of Chemical Industry.
开展了一项调查，以评估使用单一膳食来源替代禁食来诱导商品蛋鸡换羽的可能性。该研究涉及六个膳食组，每组有29只产蛋母鸡：未换羽组、干番茄渣组、苜蓿粉组、米糠组、孜然籽粉组和禁食组。在换羽期（11天），这些鸡接受上述不同饮食，同时测量体重减轻和卵巢重量的下降情况。换羽后，对产蛋参数（每只母鸡每天产蛋数、蛋重、蛋壳重量、蛋黄颜色和哈夫单位）进行了为期12周的测量。结果表明，所有膳食来源在使鸡的卵巢重量下降方面与禁食效果相当。在换羽期结束时，喂食番茄渣或苜蓿的鸡体重减轻程度低于禁食的鸡。用番茄渣或苜蓿诱导换羽的母鸡在12周内的产蛋水平高于禁食诱导换羽的母鸡。所有膳食来源诱导换羽的母鸡所产的换羽后鸡蛋质量与禁食母鸡所产鸡蛋相当，且优于未换羽母鸡所产鸡蛋。作为低代谢能且含有一定量蛋白质的纤维性饲料，干番茄渣和苜蓿粉可以随意喂给母鸡，以有效诱导换羽，同时减少严重饥饿带来的压力，并保持相当的蛋品质和产蛋量。版权所有© 2007化学工业协会。
