摘要
本试验旨在研究饲粮中添加不同水平核黄素对5~11周龄笼养蛋鸭生产性能、激素分泌及免疫器官发育的影响,以探讨笼养生长期蛋鸭适宜的核黄素添加水平。试验选用28日龄平均体重（0.27±0.01）kg的金定蛋鸭216只,采用单因素随机分组设计,随机分为6组,每组6个重复,每个重复6只鸭。对照组饲喂基础饲粮,试验组分别在基础饲粮中添加4、6、10、20、50mg/kg的核黄素。试验期7周。结果显示：1）与对照组相比,10mg/kg添加组的蛋鸭平均日增重显著升高（P〈0.05）,料重比显著降低（P〈0.05）;2）10和20mg/kg添加组血清生长激素（GH）含量显著高于对照组（P〈0.05）,各组间血清三碘甲腺原氨酸（T3）和甲状腺素（T4）含量差异不显著（P〉0.05）,但总体呈先升高后降低趋势,10mg/kg添加组达到最高值;3）10和20mg/kg添加组脾脏指数、法氏囊指数显著高于对照组（P〈0.05）;各组间胸腺指数差异不显著（P〉0.05）,10mg/kg添加组胸腺指数最高。结果提示,饲粮中添加10mg/kg核黄素能显著提高笼养生长期蛋鸭的生产性能,调节激素代谢及促进免疫器官的生长发育。
The experiment was conducted to study the effects of riboflavin on performance,hormone secretion and immune organ development of caged growing laying ducks aged from 5 to 11 weeks,and aimed to discuss a suitable supplemental level of riboflavin for the ducks.Using a single factor completely randomized design,a total of 216 4-week-old Jinding laying ducks were randomly allotted to 6 groups with 6 replicates per group and 6 ducks in each replicate.Ducks in control group were fed a basal diet,and the others in experimental groups were fed the basal diet supplemented with 4,6,10,20 and 50 mg/kg riboflavin,respectively.The experiment lasted for 7 weeks.The results showed as follows： 1） compared with the control group,supplementation of 10 mg/kg riboflavin improved average daily gain,and reduced the ratio of feed to gain of laying ducks（P0.05）.2） The serum growth hormone level in 10 and 20 mg/kg riboflavin groups was significantly higher than that in the control group.There were no significant differences in serum T3 and T4 levels among all the groups（P0.05）,but with a kickpoint at 10 mg/kg riboflavin,it showed a trend to first increase and then decrease.3） The spleen index and bursa of Fabricius index in 10 and 20 mg/kg riboflavin groups were significantly higher than those in the control group（P0.05）,and there were no significant differences in thymus index among all the groups（P0.05）,and the thymus index in 10 mg/kg riboflavin group had the highest value.In conclusion,supplementation of 10 mg/kg riboflavin in diets can improve the performance,adjust hormone metabolism and promote immune organ development of caged growing laying ducks.
出处
《动物营养学报》
CAS
CSCD
北大核心
2011年第11期1906-1911,共6页
CHINESE JOURNAL OF ANIMAL NUTRITION
基金
国家自然科学基金资助项目(30972111)
关键词
核黄素
生长期蛋鸭
生产性能
激素分泌
免疫器官
riboflavin
growing laying ducks
performance
hormone secretion
immune organ
