an evaluation of alfalfa for molt induction on intestinal morphometric parameters and performance of commercial laying hens

نویسندگان

احسان شهرامی

گروه علوم دامی، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان قزوین، قزوین- ایران مریم رضائیان

گروه علوم پایه، دانشکده دامپزشکی دانشگاه تهران، تهران-ایران

چکیده

background: the use of feed withdrawal for molt induction can negatively affected the structure and microbial environment of intestine and lead to greater intestinal colonization by salmonella infection. objectives: the aim of the present experiment was to determine the effects of alfalfa as a high fiber ingredient for molt induction on intestinal morphometric characteristics and performance of commercial laying hens. methods: in this experiment 108 hy-line (w36) laying hens aged 74 weeks in a completely randomized design with 3 treatments and 6 replicates were used. using treatments for 12 days molt period were included: 1- control group fed with layer ration (ff), 2- feed withdrawal group (fw), 3- group fed with 90% alfalfa and 10% layer ration (a90). performance of birds was monitored for 12 weeks after the end of the molting period. results: feed withdrawal hens had lowest villus height in all three regions of the intestine (p

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15 صفحه اول

the effects of using alfalfa-based molt diet compared with feed deprivation on blood parameters changes during molt period and post-molt performance of commercial laying hens

introduction: induced molting is a process that stimulates natural molting events. when birds return to full feed, a new plumage develops and the birds resume egg peroduction at a higher rate with better egg quality. induced molting extends the productive liffe of commercial chicken flocks and results in substantial reduction in the number of chickens needed to produce the nation's egg supply. ...

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Alfalfa as a single dietary source for molt induction in laying hens.

Molting is a process by which a hen's reproductive tract is rejuvenated prior to the beginning of a laying cycle. This process is often artificially induced in commercial settings in order to extend the productive life of a flock of hens. The most common method for the induction of molt is feed withdrawal for a period of several days. It has been noted that feed withdrawal, while effective in i...

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Organ weight and serum triglyceride responses of older (80 week) commercial laying hens fed an alfalfa meal molt diet.

Since one of the costs in the commercial egg industry is that of replacement pullets, commercial egg layer managers have opted to induce molt older hens in order to extend their productive life for additional egg laying cycles. Conventional molt induction involves the complete removal of feed for several days. However, this management practice can lead to deleterious physiological responses by ...

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عنوان ژورنال:
تحقیقات دامپزشکی

جلد ۷۰، شماره ۳، صفحات ۳۴۹-۳۵۶

کلمات کلیدی
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