The Study On Interaction Of Copper And Vitamin A In Broiler

A 4×2(Cu×VA) experiment with repeats was designed to study the interaction of copper and vitamin A in metabolism in broilers. 448 broilers were divided into 8 groups, each group with 4 repeats. Copper supplement amount was 0, 8, 150, 225mg/kg; Vitamin A supplement amount was 1500, 5000IU/kg. Results showed ①dietary copper levels effected significantly Vitamin A concentrations in liver during whole period(P<0.05), effected nearly significantly Vitamin A concentrations in serum from 0 to 4 weeks (P ~ 0.05)and effected significantly Vitamin A concentrations in serum from 5 to 7 weeks(P<0.01). Vitamin A concentrations in liver increased with the increase of dietary copper levels(0-8mg/kg), dietary copper levels(0-225mg/kg) didn't effect significantly Vitamin A concentrations in serum..②dietary Vitamin A levels effected significantly copper concentrations in liver from 5 to 7 weeks(P<0.01), copper concentrations in liver increased with the increase of dietary Vitamin A levels(1 500-50001 U/kg). ③The interaction between copper and VA influenced significantly Vitamin, A concentrations in liver and Vitamin A concentrations in serum during whole period(P<0.01); influenced significantly copper concentrations in liver from 5 to 7 weeks(P<0.01); influenced significantly Vitamin A metabolism.Study the effect of dietary various copper and Vitamin A levels on the physicochemical parameters of blood,such as hemoglobin concentration,red cell count, packed cell volume,erythrocyte sedimentation rate and write cell count in broilers during whole period. Results showed ① dietary copper levels effected significantly Hemoglobin concentrations and erythrocyte sedimentation rate during whole period(P<0.01); effected significantly packed cell volume from 5 to 7 weeks (P<0.01); effected significantly write cell counts during whole period(P<0.05);didn't effect significantly red cell counts during whole period(P>0.05). dietary copper levels effected significantly Hemoglobin concentrations and erythrocyte sedimentation rate and write cell counts and didn't effect significantly red cell counts; the effect of dietary copper levels on packed cell volume was related with the age.Copper(0mg/kg) group was highest on hemoglobin concentration during whole period,on packed cell volume from 5 to 7 weeks ,on erythrocyte sedimentation ratefrom 0 to 4 weeks;Copper(150mg/kg) group was highest on write cell count.②dietary Vitamin A levels effected significantly Hemoglobin concentrations, packed cell volume and erythrocyte sedimentation rate during whole period; and write cell counts from 0 (?)o 4 weeks(P<0.01)and red cell counts from 5 to 7 weeks(P<0.05).the effect on write cell counts and red cell counts was related with the age.Vitamin A(5000IU/kg) group was highesrt on hemoglobin concentration and write cell during whole period red cell count and erythrocyte sedimentation rate from 5 to 7 weeks.③The interaction between copper and VA influenced significantly Hemoglobin concentrations, erythrocyte sedimentation rate and write cell counts during whole period; and packed cell volume from 5 to 7 weeks(P<0.01 ):didn't influence significantly erythrocyte counts during whole period(P>0.05).The maxium result of physicochemical parameters of blood have great variors on the interaction of copper and vitamin A.Study the effect of dietary various copper and Vitamin A levels on serum antioxidation enzyme of ceruloplasmin and total SOD in broilers during whole period. Results showed ① dietary copper levels...