饲粮核黄素添加水平对生长獭兔生长性能、毛皮质量、血液指标及抗氧化功能的影响

Effects of Dietary Riboflavin Supplemental Level on Growth Performance,Fur Quality,Blood Indices and Antioxidant Function of Growing Rex Rabbits

本试验旨在研究饲粮核黄素添加水平对3-5月龄生长獭兔生长性能、毛皮质量、血液指标及抗氧化功能的影响。选取体重相近、健康状况良好的3月龄獭兔160只,随机分成4组,每组40个重复,每个重复1只。对照组饲喂基础饲粮,试验组分别饲喂在基础饲粮中添加3、6和12 mg/kg核黄素的试验饲粮。预试期7 d,正试期53 d。结果表明：饲粮核黄素添加水平对生长獭兔料重比、平均日增重、平均日采食量均无显著影响（P〉0.05）,对毛皮厚度、被毛长度无显著影响（P〉0.05）,但是对毛皮面积、毛皮重量有显著或极显著影响（P〈0.05或P〈0.01）。饲粮核黄素添加水平对血清胆固醇含量有显著影响（P〈0.05）,而对血清总蛋白、白蛋白、甘油三酯、尿素氮、高密度脂蛋白胆固醇和低密度脂蛋白胆固醇含量均无显著影响（P〉0.05）。6 mg/kg添加组血清和肝脏谷胱甘肽过氧化物酶活性极显著高于对照组（P〈0.01）。饲粮核黄素添加水平对血清和肝脏总超氧化物歧化酶活性、丙二醛含量以及肝脏总抗氧化能力无显著影响（P〉0.05）。结果表明,生长獭兔的饲粮核黄素添加水平为6 mg/kg（饲粮核黄素实测含量为8.35 mg/kg）时能显著提高毛皮品质和机体抗氧化能力。

This experiment was conducted to study the effects of dietary riboflavin supplemental level on growth performance, fur quality, blood indices and antioxidant function of growing Rex rabbits aged from 3 to 5 months. A total of 160 three-month-old healthy Rex rabbits with similar body weight were randomly divided into 4 groups with 40 replicates per group and 1 rabbit per replicate. Rabbits in the control group were fed a basal diet, and the others in the experimental groups were fed the experimental diets supplemented with 3, 6 and 12 mg/kg riboflavin, respectively. The pre-test period lasted for 7 days, and the experimental period lasted for 53 days. The results showed as follows： dietary riboflavin supplemental levels had no significant effects on average daily gain, average daily feed intake, ratio of feed to gain, fur thickness and wool length （ P〉0.05） , while it had significant effects on fur area and fur weight （ P〈0.05 or P〈0.01） . Dietary riboflavin supplemen-tal levels had significant effects on serum cholesterol content （ P〈0.05） , while it had no significant effects on the contents of total protein, albumin , triglyceride, urea nitrogen, high-density lipoprotein cholestorol （ HDL-C） and low-density lipoprotein cholestorol in serum （ P〉0.05） . The serum and liver glutathione peroxi-dase activity in 6 mg/kg group was significantly higher than that in control group （ P〈0.01） . Dietary riboflavin supplemental levels had no significant effects on serum and liver total superoxide dismutase activity, malondial-dehyde content and liver total antioxidant capability （ P〉0. 05 ） . In conclusion, dietary supplemented with 6 mg/kg riboflavin （ dietary riboflavin measured content is 8.35 mg/kg） can improve fur quality and antioxi-dant function of growing Rex rabbits.