动物营养学报2016，Vol.28Issue(11)：3687-3693,7.DOI:10.3969/j.issn.1006-267x.2016.11.039
饲粮铜添加水平对生长獭兔生长性能、毛皮品质、肌肉品质及氮代谢的影响
Effects of Dietary Copper Supplemental Level on Growth Performance, Fur Quality, Muscle Quality and Nitrogen Metabolism of Growing Rex Rabbits
摘要
Abstract
This experiment was conducted to investigate the effects of dietary copper supplemental level on growth performance, fur quality, meat quality and nitrogen metabolism of growing Rex rabbits. Two hundred 1⁃month⁃old Rex rabbits with the similar health conditions were randomly assigned to 5 groups with 40 repli⁃cates per group and 1 rabbit per replicate. Rabbits in 5 groups were fed experimental diets with the following copper supplemental levels:0, 5, 15, 45 and 135 mg/kg, and copper content measured values in experimen⁃tal diets were 8.19, 13.59, 23.78, 54.08 and 143.68 mg/kg, respectively. The trial lasted for 7 days for ad⁃aptation and 60 days for test. The results showed as follows: dietary copper supplemental level had extremely significant influences on average daily gain and average daily feed intake ( P<0.01) , and had no significant in⁃fluence on feed/gain (P>0.05). The highest values of average daily gain and average daily feed intake ap⁃peared when dietary copper supplemental level was 15 mg/kg. Dietary copper supplemental level had signifi⁃cant influence on fur weight (P<0.05), but had no significant influences on fur area and fur thickness (P>0.05) . The fur weight in 5 mg/kg group was significantly higher than that in 45 and 135 mg/kg groups ( P<0.05), but no significant difference was found between 5 and 15 mg/kg groups (P>0.05). Dietary copper supplemental level had extremely significant influence on drip loss (P<0.01), and had significant influences on muscle pH45min and yellowness (b∗) value (P<0.05), but had no significant influences on muscle shear force and the values of lightness ( L∗) and redness ( a∗) ( P>0.05) . The minimum of drip loss and the maxi⁃mum of pH45 min appeared when dietary copper supplemental level was 15 mg/kg. Dietary copper supplemental level had extremely significant influences on nitrogen intake, urinary nitrogen, digestible nitrogen, nitrogen re⁃tention, nitrogen apparent digestibility and nitrogen bioavailability ( P<0.01) , and had significant influences on fecal nitrogen and nitrogen availability (P<0.05). Considering all indices of this experiment, the appropriate dietary copper supplemental level is 15 mg/kg for growing Rex rabbits ( dietary copper content measured value is 23.78 mg/kg).关键词
铜/獭兔/生长性能/毛皮品质/肌肉品质/免疫器官指数/氮代谢Key words
copper/Rex rabbits/growth performance/fur quality/muscle quality/immune organ indices/nitrogen metabolism分类
农业科技引用本文复制引用
隋啸一,刘磊,高琴,李福昌..饲粮铜添加水平对生长獭兔生长性能、毛皮品质、肌肉品质及氮代谢的影响[J].动物营养学报,2016,28(11):3687-3693,7.基金项目
现代农业产业技术体系建设专项（CARS-44-B-1）；国家公益性行业（农业）科研专项（2000903006）；山东省农业重大应用技术创新课题（肉、獭兔高效高产技术研究、集成与推广）；中国博士后科学基金资助项目 （）
