Effects of Different Sources and Levels of Copper on Growth Performance, Nutrient Digestibility, and Elemental Balance in Young Female Mink (Mustela vison)
文献类型: 外文期刊
第一作者: Wu, Xuezhuang
作者: Wu, Xuezhuang;Liu, Zhi;Guo, Jungang;Gao, Xiuhua;Wu, Xuezhuang;Zhang, Tietao;Zheng, Junjun;Yang, Fuhe;Wu, Xuezhuang;Zhang, Tietao;Yang, Fuhe
作者机构:
关键词: Mink;Copper;Growth performance;Nutrient digestibility
期刊名称:BIOLOGICAL TRACE ELEMENT RESEARCH ( 影响因子:3.738; 五年影响因子:3.44 )
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收录情况: SCI
摘要: An experiment was conducted in a 3 x 3 + 1 factorial experiment based on a completely randomized design to evaluate the effects of different sources of copper on growth performance, nutrient digestibility and elemental balance in young female mink on a corn-fishmeal-based diet. Animals in the control group were fed a basal diet (containing 8.05 mg Cu/kg DM; control), which mainly consisted of corn, fish meal, meat bone meal, and soybean oil, with no copper supplementation. Minks in other nine treatments were fed basal diets supplemented with Cu from reagent-grade copper sulfate, tribasic copper chloride (TBCC) and copper methionate. Cu concentrations of experiment diets were 10, 25, and 40 mg/kg copper. A metabolism trial of 4 days was conducted during the last week of experimental feeding. Final body weight and average daily gain increased (linear and quadratic, P < 0.05) as Cu increased in the diet; maximal growth was seen in the Cu25 group. Cu supplementation slightly improved the feed conversion rate (P = 0.095). Apparent fat digestibility was increased by copper level (P = 0.020). Retention nitrogen was increased by copper level (linear, P = 0.003). Copper source had a significant effect on copper retention with Cu-Met and copper sulfate treatments retention more than TBCC treatments (P < 0.05). Our results indicate that mink can efficiently utilize added dietary fat and that Cu plays an important role in the digestion of dietary fat in mink, and mink can efficiently utilize Cu-Met and CuSO4.
分类号: Q5
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