The Influence Of Different Dietary Vitamin E And Vitamin C Levels On The Production Performances In Gushi 4C Broilers

A total of 540 one-day-old Gushi 4C broiler chickens were randomly allocated to nine treatments with 60 broilers for each treatment. A 3X3 factorial design was used.They were treatment I (VE0. VC0.control), treatment II (VE0. VC100mg/kg), treatmentIII(VE0. VC200mg/kg), treatmentVI(VE100 mg/kg. VC0), treatment V (VE100 mg/kg. VC100 mg/kg), treatmentVI (VE100. VC200 mg/kg), treatment VII (VE200, Vc0) treatmentVIII(VE200 mg/kg. VC100 mg/kg), treatmentIX(VE200, VC200 mg/kg) seperately. The prefeeding phase of the experiment was one week, the trial feeding phase was six weeks. The vitamin E concentration in the corn-soybean basic diet was 23-27mg/kg. The experiment was conducted to evaluate the influence of vitamin E and vitamin C different dietary levels on Gushi 4C broilers' performances by investigating the influence of vitamin E and vitamin C on growth performances, slaughter parameters, immunity parameters and meat quality parameters.The results showed that, the body weights at four weeks were improved significantly by 200mg/kg vitamin C addition (treatmentIII) (P<0.05). The statistically significant interactions between 100mg/kg vitamin C and 100/200mg/kg vitamin E(treatment V ,VIII), and between 100mg/kg vitamin E and 100/200mg/kg vitamin C (treatment V ,VI) for the body weight at four weeks were obtained (P<0.05).The interactions between 100/200mg/kg vitamin E and 100/200mg/kg vitamin C(treatment V , VI , VII, VIII) for daily gain and feed conversion rate were superior to those of 1 00/200mg/kg vitamin E(treatment IV, VII ) and to those 100/200mg/kg vitamin C(treatment II ,III). The influence of combination of vitamin E and vitamin C at supplemental levels on body weight, daily gain and feed conversion rate at six or seven weeks w:as similar to that at 4 weeks.The dressing percentages of the broilers fed 200mg/kg vitamin C(treatmentIII)were better than those of other treated groups and those of the control(P<0.05). The significant interaction between 200mg/kg supplemental vitamin E and 100mg/kg supplemental vitamin C (treatment III ) for improving dressing percentage was observed (P<0.05). Carcass parameters were improved to some extent for vitamin E and vitamin C different concentrations.Because of interaction ,better ND liters at 14 days for both supplemental 200mg/kg vitamin E and 200mg/kg vitamin C (treatmentlX) was observed than those of 0,100mg/kg,200mg/kg supplemental vitamin C separately ( treatment I . II .III) (P<0.05). The serum GIobulin/Albulin of the treatmentVII ( 200mg/kgVi:) was higher than that of the treatmentHK 200 mg/kgVc)at 28 days of age(P<0.05). There was a tendency that immunity parameters were improved by supplemental vitamin E or combined supplemental vitamin E and vitamin C in every measurements, howere the improvement was not significant(P>0.05).Significant differences were obtained for improving the drip loss of the breast muscle by the interaction between 100/200mg/kg supplemental vitamin E and 100/200mg/kg supplemental vitamin C (P<0.05). No significant improvements for the breast muscle drip loss (P>0.05) were detected between other treated groups and the control. The interaction between 200mg/kg supplemental vitamin E and 100/200mg/kg supplemental vitamin C(treatmentVi, IX )for improving the Napole yield of breast muscle was better than that of the control and that of the treatment III(P<0.05).The a* value of the breast muscle at 24 and 48 hours post moterm was significantly improved, and b value and L value of the breast muscle at 24 and 48 hours post moterm were significantly minimized in every treated groups of 0/100/200 mg/kg supplemental vitamin E and 100/200mg/kg supplemental vitamin C. The TEARS values of the thigh muscle stored for 14 days in treated groups were lower than the control(P<0.05), but the significant interaction for decreasing the TEARS value of the liver stored for 14 days was observed between 200mg/kg vitamin E and 200 mg/kg vitamin C only (treatment IX ) (P<0.05). The transmission value of the breast muscle stored...