نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشجوی کارشناسی ارشد، دانشگاه کشاورزی و منابع طبیعی رامین خوزستان، ملاثانی، اهواز، ایران
2 دانشیار، دانشگاه کشاورزی و منابع طبیعی رامین خوزستان، ملاثانی، اهواز، ایران
3 مربی، دانشگاه کشاورزی و منابع طبیعی رامین خوزستان، ملاثانی، اهواز، ایران
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
The purpose of this research was to evaluate the effect of five levels of vitamin A including 0, 4,000, 8,000, 16,000 and 32,000 international units per kilogram of diet on productive and reproductive parameters in Japanese quail. 320 adult Japanese quails were used in a complete randomized block design with 5 treatments, 4 replicates and 16 quails (12 female and 4 male) in each replicate for 42 days. Percentage of egg production and egg weight were recorded weekly and their mean were calculated for total period of experiment. After two weeks of experiment, food intake weight was measured to determine the daily food intake amount and food conversion ratio and was extended for total period. At the end of experiment, 5 eggs of each replicate were randomly selected for evaluate egg quality parameters, and also, 40 eggs from each replicate were incubated for evaluation the reproductive parameters. The different levels of vitamin A in diet had no significant effect on food intake, egg production rate, weight and quality parameters of eggs (P > 0.05). Fertility, hatchability, and embryonic mortality rates as well as hatched chick weight were not affected by different levels of dietary vitamin A (P>0.05). The lowest food conversion ratio was observed in 32000 IU/kg of vitamin A (P<0.05).
کلیدواژهها [English]