title: Effect of synbiotic supplementation and dietary fat sources on broiler performance, serum lipids, muscle fatty acid profile and meat quality.
abstract: A 42-d trial was conducted to investigate the effect of adding a synbiotic supplement to diets containing two different types of fat on performance, blood lipids and fatty acid (FA) composition and oxidative stability of breast and thigh meat in broilers. A total of 800 one-d-old male broiler chickens were randomly assigned into 1 of 8 treatments with 4 replicates of 25 birds per treatment. The experiment consisted of a 4 × 2 factorial arrangement of treatments including 4 concentrations of synbiotic (0, 0.5, 1 or 1.5 g/kg diet) and 2 types of fat [sunflower oil (SO) or canola oil (CO)] at an inclusion rate of 50 g/kg diet. Dietary fat type did not affect body weight gain (BWG) or feed conversion ratio (FCR) during the overall experimental period (0-42 d). However, fat type modified serum lipid profile and FA composition and 2-thiobarbituric acid-reactive substances (TBARS) content in breast and thigh meat. The addition of synbiotic to the diet linearly improved overall BWG and FCR and also decreased serum cholesterol and low-density lipoprotein cholesterol concentrations. The TBARS value in thigh meat after 30 d of storage at 4°C was linearly decreased as the synbiotic inclusion concentrations in the diets increased. Dietary synbiotic also decreased the proportion of monounsaturated fatty acids and increased n-6 polyunsaturated fatty acid (PUFA) concentration in thigh meat, whereas the FA profile of breast meat was not affected by synbiotic supplementation. Moreover, the PUFA/SFA ratio in the breast meat was linearly increased when synbiotic was included in the CO-containing diets. In conclusion, the addition of synbiotic to broiler diets had a positive effect on growth performance, blood lipid profile and meat quality. The results also support the use of synbiotic to increase the capacity of canola oil for enhancing PUFA/SFA ratio of breast meat in broilers.
authors.affiliation: a Department of Animal Science, Faculty of Agriculture and Natural Resources , Arak University , Arak , Iran.
authors.forename: H A
authors.initials: HA
authors.lastname: Ghasemi
authors.affiliation: b Department of Animal Science , University of Tehran , Karaj , Iran.
authors.forename: M
authors.initials: M
authors.lastname: Shivazad
authors.affiliation: c Department of Fisheries and Environmental Sciences, Faculty of Natural Resources , University of Tehran , Karaj , Iran.
authors.forename: S S
authors.initials: SS
authors.lastname: Mirzapour Rezaei
authors.affiliation: d Department of Poultry Science, Faculty of Agriculture , Tarbiat Modares University , Tehran , Iran.
authors.forename: M A
authors.initials: MA
authors.lastname: Karimi Torshizi
mesh_terms: D000821:Animal Feed / Q000032:analysis; D000824:Animal Nutritional Physiological Phenomena / Q000187:drug effects; D000818:Animals; D001774:Blood Chemical Analysis / Q000662:veterinary; D002645:Chickens / Q000254:growth & development* / Q000378:metabolism*; D004032:Diet / Q000662:veterinary; D004305:Dose-Response Relationship, Drug; D016984:Enterococcus faecium / Q000145:classification*; D015525:Fatty Acids, Omega-3 / Q000378:metabolism; D043371:Fatty Acids, Omega-6 / Q000378:metabolism; D007444:Inulin / Q000008:administration & dosage / Q000378:metabolism*; D008297:Male; D008460:Meat / Q000032:analysis*; D010369:Pectoralis Muscles / Q000187:drug effects* / Q000502:physiology; D011897:Random Allocation; D058616:Synbiotics / Q000008:administration & dosage / Q000032:analysis*
chemical_list: D015525:Fatty Acids, Omega-3; D043371:Fatty Acids, Omega-6; D007444:Inulin