نوع مقاله : مقاله پژوهشی
نویسندگان
گروه پرورش و مدیریت طیور - دانشکده کشاورزی -دانشگاه تربیت مدرس - تهران- ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
This study was conducted to investigate the effect of different levels of alkaline hydrolyzed feather meal (AHFM) on the performance, some intestinal morphology, and meat oxidation of Arian broiler chickens from d 14 to 42.
A total of 480 one-day-old chickens of two sexes (equal ratio) were randomly distributed among 24 pens (20 chicks per experimental unit) with dimensions of two meters by one meter. The four experimental diets contained different levels of feather meal (0, 2, 4, and 5 %), which were replicated six times.
During grower period, daily weight gain decreased and feed conversion ratio increased by elevating the AHFM levels (P<0.05). The height of jejunum and ileum villi decreased and the density of goblet cells increased with the increase in AHFM levels (P<0.05). With the increase in the level of AHFM, the concentration of malondialdehyde in fresh breast, and thigh meat decreased so that the group receiving five percent of AHFM had the lowest concentration of malondialdehyde in fresh breast and feet meat (P<0.01). The level of 5 % AHFM reduced the litter moisture (P<0.05) and the levels of AHFM did not affect the concentration of the litter ammonia. None of the mortality, production efficiency index, and feed cost per kilogram of live weight were significantly affected by experimental treatments. As a general conclusion, the use of AHFM reduced the body weight and increased the feed conversion ratio of Arian broilers compared to the control group without affecting the mortality rate and production efficiency index.
کلیدواژهها [English]
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