Studies On The Role Of β-Carotene & VE Protecting Chicken Meat Enriched With ω-3 Polyunsaturated Fatty Acids And It's Effect On Meat Quality Of Broiler

The present study were including three subexperiment. In order to study the influence of fish oil on fatty acid composition of broiler meat and it's application in poultry production, Exp.1 was conducted with sixty 4~8 weeks old Arbor Acres broilers,in this experiment,two experimental diets was designed to study the influence of diet supplementing different fat on the relative indices of broilers.There were six treatments in Exp.2,180 4 week-old birds were randly divided into six treatments, in treatment Ⅰ was fed on the fish oil diet (as the control),diets of treatment Ⅱ,Ⅲ,Ⅳ,Ⅴ and Ⅵ were formulated by supplementing 15mg/kg,45mg/kg,75 mg/kg β-carotene,200 mg/kg VE,150 mg/kg VE and 45 mg/kgβ-carotene into the control diet.The objective of this trail is to study the efficacy of VE orβ-carotene on increasing the oxidation stability of chicken meat enriched with ω-3 polyunsaturated fatty acids in it's storage which can produce EPA and DHA enriched products. We mainly study the antioxidative role and the deposition of β-carotene in meat. In Exp.3 ,180 4 week-old birds were divided into six treatments,birds in treatment Ⅰ were fed on soybean oil diet(the control), and the diets of treatment Ⅱ,Ⅲ,Ⅳ,Ⅴ and Ⅵ were formulated by supplementing 15mg/kg,45mg/kg,75 mg/kg β-carotene,100 mg/kg VE,100 mg/kg VE and 45 mg/kgβ-carotene into the control diet,the relation between VE , β-carotene and meat quality was studied in this trail. Production performance,meat physic and chemical characteristics,bloodbiochemical indices,deposition ofβ-carotene and VE in muscle,shank color,flavor,lipid peroxidation level ,and so on were assayed in these three experiments.The main results are:The result of Exp.1 indicated that birds fed on fish oil diet,daily gain ,feed conversion rate, content of EPA and DHA in meat increased significantly(P<0.05).Meat color and shank color decreased significantly(P<0.05). And the concentration of TC,TG,LDL,VLDL in blood decreased,but that of HDL increased.The scent increased. But the lipid peroxidation level of meat increased significantly with fish oil supplementing into diet(P<0.05). In Exp. 2, results suggested that fish oil diet supplemented with different levels ofβ-carotene or VE, the content of SFA, ω-3 PUFA and total PUFA in breast meat increased(P<0.05) .Meat color and shank color improved.The offensive smell of fish and lipid peroxidation level of ω-3 PUFA decreased ,thus can prolong the storage time.Among these all treatments groups, the efficacy of β-carotene(75mk/kg) , VE(200mg/kg) , β-carotene(45mk/kg) + VE(150mg/kg) is better than the other groups.Results of Exp. 3 indicated that birds fed on soybean oil diet supplemented with different levels ofβ-carotene or VE, production performance of broilers increased significantly(P<0.01). Meat color and water holding capacity increased when birds fed on soybean oil diet supplemented with 100mg/kg VE. When diet supplemented with 45mg/kgβ-carotene ,shank color increase and the content of insinic acid in meat increased significantly(P<0.01). The accmulation of β-carotene in meat increased with the increasing of β-carotene supplemented into diet, but the total deposition was little.Based on these above results, the conclusions could be made that the supplementing fish oil into broilers diet can increase the production performance of broilers, and it can increase the content ofω-3 PUFA in meat product which was significant for producing meat enriched withω-3 PUFA, the only defeat was it's easily peroxidation, but it could be cleared up or relieved by adding 200mg/kg VE or 75mg/kg β-carotene or 45mg/kg β-carotene+150mg/kg VE into diet. Whenfish oil diet supplemented with different levels of VE or β-carotene ,shank color of birds can increase markedly,and the offensive smell of fish and meat lipid peroxidation can decrease markedly. Soybean oil diet supplemented with different levels of VE or β-carotene can increase the productivity of birds. There was no apparent cooperati...