Zhong Wei, Liu Hanlu, Luo Guoliang, Chang Zhongjuan, Liu Fenghua, Zhao Jingbo, Li Danli, Yue Zhigang, Zhang Haihua, Li Guangyu
Institute of Special Economic Animal and Plant Science, Chinese Academy of Agricultural Sciences, Changchun, China.
Anim Sci J. 2014 Jul;85(7):757-62. doi: 10.1111/asj.12208. Epub 2014 May 5.
Copper has an essential role in normal fur pigmentation and fur quality. This study evaluated the effects of cupric citrate (CuCit) supplementation on growth, nutrients metabolism and pelt characteristics of the female silver fox (Vulpes fulva). Fifty age-matched female silver foxes with similar body weights were randomly divided into five dietary groups for 58 days during the winter fur-growing season. The basal diet contained 4.92 mg/kg copper. Groups I-V were supplemented with 6, 30, 60, 90 or 150 mg Cu from CuCit per 1 kg dry matter basal diet. Serum alkaline phosphatase activity was significantly higher (P<0.05) in those fed 90 mg/kg Cu than those fed 150 mg/kg Cu. Pelt total thickness was significantly higher (P<0.05) in those fed 30 mg/kg Cu than foxes fed 6 mg/kg Cu supplemented diet, but were similar to the other groups. Length of guard hair was significantly lower (P<0.05) in those fed 90 mg/kg Cu than fed 6 mg/kg Cu and 30 mg/kg Cu, but were similar to the other groups. Length of underhair was significantly higher (P<0.05) in those fed 6 mg/kg Cu than those fed 90 mg/kg Cu, but was similar to the other groups. Considering decreasing environmental contamination and improving pelt performance, supplementing 30 mg/kg Cu from CuCit (actual copper 35 mg/kg dry matter) is appropriate for female silver fox.
铜在正常的皮毛色素沉着和皮毛质量中起着至关重要的作用。本研究评估了补充柠檬酸铜（CuCit）对雌性银狐（Vulpes fulva）生长、营养物质代谢和皮毛特性的影响。在冬季皮毛生长季节，将50只年龄匹配、体重相近的雌性银狐随机分为五个日粮组，为期58天。基础日粮含铜量为4.92毫克/千克。第I - V组每1千克干物质基础日粮分别补充6、30、60、90或150毫克来自CuCit的铜。饲喂90毫克/千克铜的银狐血清碱性磷酸酶活性显著高于（P<0.05）饲喂150毫克/千克铜的银狐。饲喂30毫克/千克铜的银狐皮毛总厚度显著高于（P<0.05）饲喂补充6毫克/千克铜日粮的银狐，但与其他组相似。饲喂90毫克/千克铜的银狐针毛长度显著低于（P<0.05）饲喂6毫克/千克铜和30毫克/千克铜的银狐，但与其他组相似。饲喂6毫克/千克铜的银狐绒毛长度显著高于（P<0.05）饲喂90毫克/千克铜的银狐，但与其他组相似。考虑到减少环境污染和改善皮毛性能，每千克干物质日粮补充30毫克来自CuCit的铜（实际含铜量为35毫克/千克干物质）对雌性银狐是适宜的。
