Study The Effects Of Dietary Copper Level On The Growing And Finisher Pigs

CuSO₄.5H₂O. were selected as copper sources to study on the effect of dietarycopper level on performance,microelement of faeces,the color, shape and the content ofwater of faeces and serum biochemical parametersin growing and finisher pigs. The trailwas finished by trail 1 and 2.In trail 1,108 growing pigs(Duroc×Landrace×Yorkshire) were randomly divided intocontrol group,treatment land treatment 2 by weight and sex. the level of copper was respectively250mg/kg,150mg/kg and 50mg/kg. The results showed that no significant differenceswere observed in performance in three group (p＞0.05). The appearance had nosignificant difference. Compared with supplement with 50mg/kg copper, the content ofcopper was significantly increased supplement with 150mg/kg and 250mg/kg infaeses(P＜0.01),The color, shape and the content of water of faeces were transformed withcopper levels. the content of serum urea nitrogen and total protein, the activity ofglutamate-pyruvate transaminase, glutamate-oxalacetate transaminase and ceruloplasminhad no difference(p＞0.05) in three copper level.but the activity of alkaline wassignificantly increased(p＜0.05) in 50mg/kg copper level.In trail 2,90 finisher pigs(Duroc×Landrace×Yorkshire) were randomly divided intocontrol group,treatment land treatment 2 by weight and sex.the level of copper was respectively200mg/kg, 125mg/kg and 25mg/kg. The results showed that no significant differenceswere observed in performance in diet supplemented 25mg/kg copper compared with dietsupplemented 200mg/kg and 125mg/kg (p＞0.05). The appearance had no significantdifference. the content of copper was significantly increased in faeses by increasing thecopper level(P＜0.01).The color, shape and the content of water of faeces weretransformed with copper levels.the content of serum urea nitrogen and the activity ofalkaline were significantly decreased, but total protein was significantly increased in dietsupplemented with 25mg/kg copper compared with 200mg/kg copper (p＜0.05). Theactivity of glutamate-pyruvate transaminase was increased, copper activity was decreasedin diet supplemented with 125mg/kg copper, compared with 200mg/kg copper (p＜0.05).Copper had no significant role in performance in growing and finisher pig.Thecontent of copper and color, shape and the content of water in faece swas significantlyaffected by copper level.Biochemical parameters were differently changed by copperlevel in two trail.