本文旨在探讨日粮铜水平对断奶至2月龄生长肉兔生产性能、血清指标的影响。选用新西兰断奶肉兔100只，随机分为5组，每组20个重复，每个重复1只兔。对照组饲喂基础日粮，试验组分别饲喂在基础日粮中以五水硫酸铜形式添加20、40、80和160 mg/kg铜的日粮，预试期7 d，正试期21 d。结果表明：日粮铜水平对生长肉兔平均日增重影响极显著(P=0.002 4)，对料重比和平均日采食量无显著性影响(P>0.05)；日粮铜水平对铜锌超氧化物歧化酶和血清铜蓝蛋白活性影响不显著（P>0.05），对血清总蛋白、球蛋白含量有显著影响（P=0.040 3，P=0.043 6），对白蛋白、白球比、尿素氮、总胆固醇含量无显著影响（P>0.05）；日粮铜水平极显著影响血清胰岛素的含量（P=0.005 9），显著影响血清生长激素水平（P=0.024 8），对类胰岛素样生长因子-Ⅰ无显著影响（P>0.05）。综合本试验结果，断奶至2月龄生长肉兔铜适宜添加水平为40～80 mg/kg（日粮实际含量为50～90 mg/kg）。

The experiment was conducted to study the effects of dietary copper levels on the production performance and serum indices of weanling to 2-month-old growing meat rabbits. One hundred New Zealand weanling rabbits were randomly divided into 5 groups with 20 replicates each and 1 rabbit in each replicate. Rabbits in the control group were fed basal diet and those in test groups were fed basal diet supplemented with 20, 40, 80 and 160 mg/kg copper (CuSO4·5H2O), respectively. The trial lasted for 28 days, including preset period for 7 days and test period for 21 days. The results showed that, the copper levels in diet had significant effect on the average daily gain (P=0.002 4), but no significant effect on the feed/gain ratio and average daily intake (P>0.05); the copper levels in diet had no significant effect on the activities of cuprozincsuperoxide dismutase and ceruloplasmin in serum (P>0.05); the dietary copper levels could significantly increase the contents of total protein and globulin in serum（P=0.040 3, P=0.043 6）, while the albumin, albumin/globulin ratio, urea nitrogen and total cholesterol in serum were not significantly affected (P>0.05 ); the dietary copper levels had significant effect on insulin (P=0.005 9) and the growth hormone (P=0.024 8), while no significant effect on the insulinlike growth factor-Ⅰ(P>0.05). In conclusion, the appropriate supplementation of copper in diet of weanling to 2-month-old New Zealand rabbits was 40-80 mg/kg (the actual content of copper in diet was 50～90 mg/kg)