饲粮中添加铜对家兔生产性能、脂肪酸分布、胆固醇含量和氧化稳定性的影响

V. Skřivanová, M. Skřivan, M. Marounek, M. Baran
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引用次数: 15

摘要

试验开始时5周龄的家兔104只,按饲料添加剂处理分为4组。1、2、3、4组分别饲喂基础颗粒饲料(对照)、基础饲料中添加50mg Cu·kg‐1的CuSO4·5H2O、基础饲料中添加150mg Cu·kg‐1的CuSO4·5H2O、基础饲料中添加100mg·kg‐1的维生素E。试验期42 d。铜添加量为150mg·kg。‐1使体重增加非显著增加9.1%。这种影响在前两周的增肥中最为明显。添加量最高的家兔死亡率最低(7.7%,对照组19.2%)。家兔11周龄时屠宰。两种处理都不影响从腰部和后腿肌肉中提取的脂质中饱和、单不饱和和多不饱和脂肪酸的比例。饲粮铜和维生素E最高时,兔腰肉和后腿肉的胆固醇浓度分别显著降低了13.6%和17.9%。铜添加量为50mg·kg‐1时,影响不大。铜对肉类的氧化稳定性没有影响,在肉类中以硫代巴比妥酸反应物质的形式在4°C下储存0、3和8天。添加过量的维生素E可改善肉的氧化稳定性。在铜饲兔中,铜在肝脏中积累,而不是在肌肉中积累。对先前饲喂硫酸铜的家兔饲喂基础饲料7 d,肝脏铜浓度降低14.0% ~ 24.4%
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effect of feeding supplemental copper on performance, fatty acid profile and on cholesterol contents and oxidative stability of meat of rabbits
One hundred and four rabbits, five weeks old at the beginning of the experiment, were divided into four groups according to a feed additive treatment. Rabbits of the 1st, 2nd, 3rd and 4th group were fed a basal granulated feed (control), basal feed supplemented with CuSO4 · 5H2O at 50mg Cu · kg‐1, basal feed supplemented with 150mg Cu · kg‐1, and the latter feed supplemented with 100mg · kg‐1 vitamin E, respectively. The duration of the experiment was 42 days. Addition of Cu at 150mg · kg.‐1 increased weight gain non‐significantly by 9.1%. This effect was the most pronounced in the first two weeks of fattening. The lowest mortality was observed in rabbits fed the highest amount of additives (7.7% vs. 19.2% in the control). Rabbits were slaughtered at the age of 11 weeks. Neither treatment influenced proportions of saturated, monounsaturated and polyunsaturated fatty acids in lipids extracted from the loin and hindleg muscles. In rabbits fed the highest amount of copper and vitamin E, the cholesterol concentration was significantly decreased by 13.6% and 17.9% in the loin and hindleg meat, respectively. Effects of Cu added at 50mg · kg‐1 were marginal. Copper had no effect on the oxidative stability of meat, measured as thiobarbituric acid‐reactive substances in meat stored at 4°C for 0, 3 and 8 days. Vitamin E added in excess of nutritional requirement improved the oxidative stability of meat. In copper‐fed rabbits, Cu accumulated in the liver, but not in muscles. Feeding of the basal feed for 7 days to rabbits previously fed copper sulphate decreased the hepatic Cu concentration by 14.0 to 24.4%
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