肉仔鸡上纳米维生素A的相对生物学效价评估  

Research on Relative Bio-value of Nano-vitamin A in Broilers

作　　者：顾克松 蔡春[1] 龚月生[1] 

机构地区：[1]西北农林科技大学动物科技学院,陕西杨凌712100

出　　处：《家畜生态学报》2017年第2期22-28,51,共8页Journal of Domestic Animal Ecology

摘　　要：试验通过研究纳米维生素A和普通维生素A对肉鸡生产性能、免疫器官指数、胫骨灰分钙磷含量及组织和血清中维生素A含量的影响,来评定其相对生物学效价,为维生素A的选用提供理论依据。试验采用单因素完全随机试验设计,将300只健康、体重基本一致的1日龄AA肉鸡随机分为10个处理组,每组5个重复,每重复6只鸡。基础日粮以玉米、豆粕为主,其中1~5组在基础日粮中添加普通维生素A(750、1 500、2 250、3 000、3 750IU/kg);6~10组在基础日粮中添加纳米维生素A(750、1 500、2 250、3 000、3 750IU/kg),进行为期21d的饲养试验。结果表明:普通维生素A和纳米维生素A能显著影响料重比、肝脏维生素A水平和肾脏维生素A水平,且料重比随维生素A添加量的增加显著线性减少,肝脏、肾脏维生素A水平随维生素A添加量的增加显著线性增加。应用斜率比法得出纳米维生素A的相对生物学效价0.957(料重比)、1.816(平均体重)、1.858(日增重)、0.679(肝脏维生素A)、0.779(肾脏维生素A)、0.690(血清维生素A)、1.243(脾脏指数)、0.854(法氏囊指数)和3.133(灰分钙比例)。研究结果表明,纳米维生素A较普通维生素A的生物学效价高,以平均体重和日增重为评价指标,纳米维生素A的生产性能的相对生物学效价估测为1.816和1.858。An experiment was conducted to evaluate the effects of ordinary vitamin A （VA） and nano- VA on growth performance, immunity index, calcium,phosphorus and ash content and VA concentrations in liver, kidney and serum of broilers from 1 to 21 days of age and to research the relative bio-value of nano VA. By using a single factor completely randomized design, 300 one-day-old AA broilers were randomly divided into 10 groups with 5 replicates in each group and 6 broilers in each replicate. Ordinary VA and nano VA were used to provide 750, 1 500, 2 250, 3 000, 3 750 IU/kg activity in a nutritionally completed corn-soybean meal diet. The experiment phase was 1 ？21 d. The results are as follows： feed conversion （FCR） , spleen index, liver vitamin A content, renal vitamin A content and serum vitamin A content were all significantly affected by ordinary vitamin A and nano vitamin A（P〈0 . 05）. However, no significant differences on the average daily gain, average weight and average daily feed intake （ P 〉0. 05） were ob-served. By comparing the relative biological value of the two with non-linear model, the relative biological value of nano vitamin A was acquired, namely, feed conversion 0. 9574, average weight 1. 8155,average daily gain 1. 8577, liver vitamin A content 0. 6786, kidney vitamin A content 0. 7793, serum vitamin A content 0. 6904, spleen index 1. 2432, fabricius index 0. 8538, and calcium percentage 3. 1327. The results showed that in ferms of economic benefits, nano vitamin A is comparatively better in biological values than the ordinary vitamin A. Taking average body weight and daily gain as the assessment indicators, the rela-tive biological value of the productive performance of nano vitamin A is 1. 8155 and 1. 8577.

关 键 词：纳米 维生素A 肉鸡 生产性能 相对生物学效价 

分 类 号：S811.5[农业科学—畜牧学]