عنوان

تاثیر مکمل سازی جیره غذایی با ویتامین Eو سلنیوم آلی و معدنی بر عملکرد، کیفیت گوشت و ظرفیت آنتی اکسیدانی غاز‏

Text of Note

Research Aim: This experiment was conducted to evaluate the effects of various sources of selenium and vitamin E on the performance, meat quality, immune system and some blood glucose levels of Azarbayjan local geese.Research method: This experiment was conducted using 128 native goose in a completely randomized design with 4 treatments, 4 replicates and 8 birds per replicate. The experimental diets were: 1. base diet 2. Base diet plus 0.3 mg organic selenium per kg of diet (Sel-plex) 3. Base diet plus 0.3 mg inorganic selenium per kg of diet (selenite sodium) 4- Base diet plus 120 mg of vitamin E per kilogram of diet. Growth performance indexes including feed intake, feed conversion ratio and daily gain were calculated weekly and periodically. For evaluation of cellular immunity, at the end of breeding period, two birds from each experimental unit were randomly selected and phythemagglutinin solution was injected 0.1 ml between the legs curtain of the geese. Also, at the end of the experimental period, 2 geese of each replicate were randomly selected and their blood samples were taken to measure some blood parameters such as cholesterol, HDL, triglycerides and total antioxidant capacity. At the end of the experiment, two birds were selected from each replicate, and carcass characteristics and chemical composition of the meat were evaluated. Performance data were analyzed using proc Mixed and other data using with SAS software proc GLM.Findings: The results of this study showed that adding different sources of selenium and vitamin E did not have a significant effect on feed consumption of goose chicks (P <0.05). The sources of organic and inorganic selenium and vitamin E significantly improved feed conversion rate and daily gain of birds compared to the control group (P <0.05). The European index of production in the experimental groups of organic selenium, inorganic selenium and vitamin E increased compared with control groups (P <0.05). The effect of the breeding period on all the performance indexes of Goose was significant and feed intake , weight gain and feed conversion ratio increased (P <0.05) with increasing bird's age up to 6 weeks. The tissue immune response of the geese was significantly incresed 48 hours after injection of phytohemaglutinin in the experimental groups receiving organic selenium and vitamin E compared to the control group and sodium selenite (P <0.05). The addition of different sources of selenium and vitamin E significantly affect on the chemical characteristics of meat and liver including pH, acidity, moisture, ash, protein and crude fat during storage (0, 3, 6 and 9 days at 4 ° C). There was a significant increase in protein content of geese meat and organic selenium and vitamin E groups were significantly higher than other treatments. The group containing organic selenium decreased the amount of malondialdehyde and total volatile nitrogen in bird meat (P <0.05) and increased the amount of phenolic composition in the meat and liver sample (P <0.05). Organic selenium caused a significant reduction in total blood cholesterol compared to the control group and sodium selenite group (P <0.05). Organic selenium caused a significant increase in the total antioxidant capacity of the geese blood plasma compared to the control group and sodium selenite (P <0.05). The amount of triglyceride and HDL (high density lipoprotein) in the blood of the geese did not affect by treatments (P >0.05).Conclusion: the results of the present study, showed that addition of organic supplementation of selenium and vitamin E caused improve the growth performance as well as increase meat quality and the geese immune system.