نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشیار دانشکدة دامپزشکی دانشگاه تهران
2 استادیار دانشکدة کشاورزی دانشگاه تبریز، تبریز
3 استاد، پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج
4 استادیار دانشگاه علوم کشاورزی و منابع طبیعی ساری
5 استادیار مؤسسۀ تحقیقات سرم و واکسن رازی، کرج
6 دانشیار دانشکدۀ بهداشت دانشگاه علوم پزشکی تهران
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
The objective of the present study was to investigate the effects of high dietary levels of L-arginine during starter period on growth, intestine morphology and immune system of female Ross broiler chicks. In this experiment, 192 day old female Ross broiler chicks were fed with 4 dietary treatments in a completely randomized design, in which each dietary treatment included 4 replications. Dietary treatments included 100%, 153%, 168% and 183% of digestible arginine, based on the Ross recommendation, and were fed from day 1 to 10. On d 10 of the experiment, chicks were weighed and feed consumption was recorded. Then, three chicks per replication were slaughtered in order to survey intestinal histology and immune system. The results showed that high dietary levels of arginine had an increasing effect (P<0.01) on 10th day body weight, feed efficiency, immune system characteristics, weight and length of small intestine, and its villus height and crypt depth. According to the results of this study, 168% digestible arginine, based on the Ross recommendation, had the best desirable results on growth improvement of broiler chicks and it also improved weight, length and histology of small intestine, and immune characteristics.
کلیدواژهها [English]