摘要
本试验旨在探讨饲粮维生素A添加水平对3～5月龄生长獭兔生长性能、毛皮品质、维生素A沉积、血清生化指标及抗氧化性能的影响。选取平均体重为（1．50-4-0．14）kg的3月龄獭兔200只，随机分成5组（每组40个重复，每个重复1只），对照组饲喂基础饲粮，试验组分别饲喂添加5000、10000、20000和40000IU／kg维生素A的试验饲粮，预试期7d，正试期53d。结果表明：饲粮维生素A添加水平对料重比有显著影响（P〈0．05），对平均日增重、平均日采食量均无显著影响（P〉0．05）；饲粮维生素A添加水平对獭兔毛皮重量和毛皮面积影响极显著（P〈0．01），对毛囊密度、初级毛囊密度、次级毛囊密度和次级毛囊密度／初级毛囊密度均无显著影响（P〉0．05）；饲粮维生素A添加水平对血清及肝脏维生素A含量影响显著（P〈0．05），血清和肝脏维生素A含量均随饲粮维生素A添加水平的提高显著升高（P〈0．05）；饲粮维生素A添加水平对血清尿素氮和白蛋白含量影响显著（P〈0．05），对血清总蛋白、甘油三酯、胆固醇、高密度脂蛋白、低密度脂蛋白含量影响均不显著（P〉0．05）；饲粮中添加维生素A可以极大地改善血清和肝脏的抗氧化性能，饲粮维生素A添加水平对血清谷胱甘肽过氧化物酶（GSH—Px）和总超氧化物歧化酶（T—sOD）活性影响极显著（P〈0．01），对血清丙二醛（MDA）含量影响显著（P〈0．05），对肝脏GSH—Px活性影响极显著（P〈0．01），对肝脏T—SOD活性和MDA含量有显著影响（P〈0．05），对肝脏总抗氧化能力无显著影响（P〉0．05）。综合考虑本试验所测指标，生长獭兔饲粮中维生素A适宜添加水平为10000IU／kg。
The purpose of this trial was to study the effects of dietary vitamin A level on growth performance, fur quality, vitamin A deposition, serum biochemical indices and antioxidant function of growing Rex rabbits aged 3 to 5 months. Two hundred 3-month-old Rex rabbits with an average body weight of （ 1.50 ＋_0.14） kg were randomly assigned to 5 groups with 40 replicates in each group and each replicate contained 1 rabbit. Rabbits in control group were fed a basal diet, and rabbits in the experimental groups were fed experimental di- ets containing 5 000, 10 000, 20 000 and 40 000 IU/kg vitamin A, respectively. There was a pretrial period of 7 days followed by an experimental period of 53 days. The results showed as follows ： the dietary vitamin A level had a significant impact on feed/gain （ P 〈 0.05 ） , and had no significant effects on average daily feed intake and average daily gain （P 〉 0.05 ） ; the dietary vitamin A level had significant impacts on fur weight and fur area （ P 〈 0.01 ）, and had no significant effects on hair follicle density, primary hair follicle density, secondary hair follicle density and secondary hair follicle density/primary hair follicle density （ P 〉 0.05 ） ; the dietary vitamin A level had significant impacts on vitamin A content in serum and liver （ P 〈 0.05 ）, and the vitamin A content in serum and river was observably increased with the increase of dietary vitamin A level （P 〈 0.05） ; the dietary vitamin A level had significant impacts on urea nitrogen, total protein and albumin contents in serum （ P 〈 0.05 ）, and had no significant effects on triglyceride, cholesterol, high density lipopro- teins and low density lipoprotein contents in serum （P 〉 0.05） ; the dietary vitamin A supplement could im- prove the anti-oxidative activity in serum and liver, had significant impacts on the activities of glutathione per- oxidase （ GSH-Px ） and total superoxide dismutase （T-SOD） （P 〈 0.01 ）, and malondialdehyde （MDA） con- tent （ P 〈 0.05 ） in serum, had significant impacts on the activities of GSH-Px （ P 〈 0.01 ） and T-SOD （ P 〈 0.05 ）, and MDA content （ P 〈 0.05 ） in liver, and had no significant effect on total antioxidation capacity in liver （ P 〉 0.05 ）. Considering all indices of this experiment, the appropriate vitamin A level in the diet of growing Rex rabbit is 10 000 IU/kg.
出处
《动物营养学报》
CAS
CSCD
北大核心
2014年第4期981-988,共8页
CHINESE JOURNAL OF ANIMAL NUTRITION
基金
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)
关键词
维生素A
生长獭兔
生长性能
毛皮品质
维生素A沉积
血清生化指标
抗氧化性能
vitamin A
growing Rex rabbits
growth performance
fur quality
vitamin A deposition
serumbiochemical indices
antioxidant function
