Effects Of Defferent Level Copper Added In Diets On Production,digestion And Metabolism Of Nutrients,composition Of Tissue And Organs Of Angora Rabbits

The effects of five copper levels added in basal diet on performance of Angora rabbits were studied. Fifty 90-day old Angora rabbits were divided randomly into five groups, ten each ,using a designing of single factor. Standard diet supplemented with five copper levels at CuSO4 5H20 0, 10 ,20 ,100 and 200 mg/kg .The copper content of basal diet is 10.56mg/kg .The results are as follows :(1)the average daily weight gains of the group fed with basal diet containing (10,20mg/kg) were in a normal range:The wool production and wool growth rate reach the reported value, and the indexes of copper content in blood showed a good nutrient condition of rabbits.(2)The average daily live-weight gains were affected positively (P<0.0l) with increasing diet supplement (100 and 200 mg/kg )(r=0.90).The growth wool rate of rabbit correlated positively with copper content added in diet(r0.77).(3)The feed intake, consumption of energy and Nitrogen, apparent digestibility of energy and apparent retention of Nitrogen significant(P<0.01) increased by supplementing diet with Cu(200mg/kg) in digestion trial of rabbits .(4)Copper content in liver increased greatly with the level of copper in diet, no change in blood copper ,copper excretion feces was more but was not in urine (5)The activity of SOD in red blood and ceruloplasmin had no changes with copper added in diet.