نوع مقاله : مقاله پژوهشی
نویسندگان
1 سازمان تحقیقات، آموزش و ترویج کشاورزی، موسسه تحقیقات علوم دامی کشور، کرج. ایران.
2 عضو هیئت علمی دانشکده کشاورزی دانشگاه پیام نور تهران، تهران. ایران.
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
This study was conducted to study the effects of different levels of hydrolyzed hoof meal, as a dietary ingredient, on the performance, carcass characteristics, and jejunum histology of broiler chickens during the finisher phase with pelleted diets. Six hundred Ross 308 male broiler chicks, with equal average weight, were randomly assigned to four experimental groups in a completely randomized design, with five replicates per group and 30 birds per replicate, from 25 to 44 days of age. The experimental treatments included: (1) a control diet (without hoof meal), (2) a diet containing 2% hoof meal, (3) a diet containing 4% hoof meal, and (4) a diet containing 6% hoof meal. The results of performance showed that, compared to the control diet use of 2% and 6% of hoof meal reduced the cost of feed consumed per kilogram of live weight of chicks by improving the feed conversion ratio of the bird between 35 and 44 days of age. Relative carcass and thigh weight were increased by the dietary inclusion of 6% hydrolyzed hoof meal compared to the control (P < 0.05). Histological analysis revealed that jejunal crypt depth was significantly decreased in broilers fed 2% hydrolyzed hoof meal compared with the control diet (P < 0.05). This study demonstrated that feeding dietary hydrolyzed hoof meal during the finisher phase positively influenced broiler carcass traits and jejunum histology without negatively impacting performance.
کلیدواژهها [English]
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