تعيين زيست فراهمي كلسيم صدف معدني اردبيل و بررسي امكان كاربرد آن در جيره غذايي جوجه‌هاي گوشتي

Determination of Ardabil mineral oyster bioavailability in diet of broiler chickens

براي بررسي تركيبات معدني صدف معدني توليدي در شهرستان كوثر استان اردبيل، دو آزمايش انجام شد. در آزمايش اول در 6 نمونه مركب و يك نوع صدف تجاري، ميزان كلسيم، فسفر، منيزيم، فلوئور و فلزات سنگين تعيين و ميزان حلاليت در اسيد كلريدريك 0/1 نرمال و آب مقطر دوبار تقطير، انجام شد. فقط ميزان كلسيم و حلاليت صدف اردبيل كمتر از صدف تجاري بود(0/05

To investigate the composition of mineral oyster produced in Khosar city of Ardabil province, two experiments was performed. In first study, in six composed samples and one type commercial oyster, amount of calcium, phosphorus, magnesium, flurein and toxic and heavy metals and solubility of mentioned mineral sources in 0.1 N of HCL and double distillated water, were done. Only calcium amount and solubility rate in Ardabil oyster, lower than commercial oyster (p<0.05). In second stage, were used of 240 one day old male Ross 308 broiler chickens in completed randomized design with 5 treatments by 4 replicates containing 12 chicks from 1-46 day old. In these experiment, Replaced commercial oyster with Ardabil oyster mineral in five levels (0, 25, 50, 75 and 100). Performance indexes, carcass treats, tibial bone morphology were not significant in different treatments. Calcium apparent retention and blood calcium concentration in treatments containing 75 and 100 percent of commercial oyster was higher than diet containing 100 percent Ardabil oyster (p<0.05). The highest relative bioavailability (RBV) was obtained in diets containing 25 percent Ardabil oyster plus 75 percent commercial oyster in grower phase and vice versa in finisher phase. Overall, based on performance indexes and bone morphologic traits, commercial oyster in broiler chicken diets could be replaced in 100 percent level by Ardabil mineral oyster