Effects of Dietary Supplemented with Different Levels of Copper on Pigeon Egg Quality,Copper Content in Tissues and Serum Antioxidant Indexes of Squab
This experiment was conducted to investigate the effects of dietary supplementation of different lev-els of copper on the contents of copper in tissues of squab and milk of breeder pigeons,the quality of egg and the serum antioxidant indexes of squab.A total of 120 pairs of Yinyu King's parented breeding pigeons were randomly divided into 5 groups,including 1 control group(basal diet supplemented with no copper)and 4 ex-perimental groups(basal diet supplemented with 4,8,12 and 16 mg/kg copper,respectively).Using CuSO4·5H2O(copper content 24.57％)as copper source,the measured copper content of each group was 5.66,8.67,11.46,15.22 and 20.09 mg/kg,respectively.The experiment lasted for 46 days.Result showed as follows:with the increase of dietary copper supplemental level,the copper content of pigeon milk and aver-age daily feed intake(ADFI)of breeding pigeons aged from 1 to 28 days were linearly increased(P＜0.05).Compared with the control group,dietary supplemented with 4 mg/kg copper significantly increased yolk col-or,serum catalase(CAT)activity of female pigeon,serum ceruloplasmin(CP)activity of squabs(P＜0.05).Dietary supplementation of different levels of copper had no significant effects on the copper content in liver,heart and breast muscle of squabs,malondialdehyde(MDA)content,copper and zinc superoxide dismutase(CuZn-SOD)activity in serum and tissues of squabs,ADFI of breeding pigeons,egg weight,egg shape in-dex,protein height,Haugh unit,yolk weight,eggshell color,eggshell thickness and serum CP activity of fe-male pigeons(P＞0.05).Serum CP activity of squabs and serum CAT activity of female pigeons were used as sensitive indexes to evaluate the dietary copper requirement of breeding pigeons.The optimal supplemental lev-els of copper sulfate were 3.96 and 7.96 mg/kg,respectively.In conclusion,dietary supplementation of cop-per can improve egg quality and antioxidant capacity of female pigeons and squabs.[Chinese Journal of Ani-mal Nutrition,2024,36(5):3049-3060]
万方数据
维普
