【作者】 周敏；

【导师】 王士长；

【作者基本信息】 广西大学 ， 动物营养与饲料科学， 2005， 硕士

【摘要】 本研究旨在探讨维生素E对樱桃谷鸭产肝性能、肝脏组织形态及血液生理生化指标的影响,为深入研究脂肪肝形成的生化机理提供直接的数据;并确定维生素E在肥肝生产中适宜的添加量,为研究指导肥肝生产的饲料配制提供科学的理论依据。 试验采用单因子随机设计方案。选用42日龄健康的樱桃谷鸭120只,要求体重差异不显著,随机分为5组,每组24只,每个处理设2个重复,每个重复12只。各组基础日粮相同,维生素E的添加量分别为0IU/kg(A组)、10IU/kg(B组)、30IU/kg(C组)、90IU/kg(D组)、270IU/kg(E组)。整个试验期分成预饲期和填饲期两个阶段,预饲10天后,于52日龄时进入填饲期,填饲期为3个填饲周,每个填饲周为6天。每个填饲周统计填料量、记录体增重,并于填饲期末对樱桃谷鸭的生长性能、产肝性能、肥肝等级、肥肝化学组成、脂肪酸组成和血液生化指标进行测定。 试验结果表明:(1)在樱桃谷鸭的填饲日粮中添加维生素E可提高其日增重和饲料转化率,但差异不显著(P>0.05)。(2)添加维生素E可降低料肝比,显著增加樱桃谷鸭的产肝性能。D组维生素E添加量为90IU/kg,其平均肝重达到一级标准,比A组提高了35.92%,更多还原

【Abstract】 The experiment was conducted to investigate the effects of VE supplement on foie gras production, histology character and blood biochemical indices of cherry valley ducks. The objective of this research is to study the biochemistry mechanism about forming foie gras of cherry vally ducks and determin VE supplement for optimum nutrition level in producing foie gras of cherry valley ducks.In the experiment;, 120 42-day-old cherry vally ducks were randomly divided into equal 5 groups with 24 ducks each. Different levels of VE were set up in each group. The VE supplement in experiment diet were 0 IU/kg ( group A), 10 IU/kg ( group B ), 30 IU/kg ( group C ), 90 IU/kg ( group D ), 270 IU/kg ( group E ), respectively. The period was divied into two phases including 10 days of pre-experiment period and 3 weeks force-feeding period. Feed intake, average body weight were recorded weekly. At the end of force-feeding period, production, grade,composition, fatty acid component of foie gras and blood biochemical indices of ducks were measured.The results showed that: (1) The growth and the feed conversion rate tended to increase as dietary VE increased. No significant difference was observed (P>0.05). (2) The foie gras weight of group C and group D was larger than that of control, and the rate of feed consumption and foie gras weight tended to reduce in treatment groups when compared to control group. When the VE level was 90 IU/kg, the average foie gras weight was grade one, and higher than that of the group A by 35.92% (PO.01). (3) No significant differerence in slaughter performance was observed among the treatments (P>0.05). The foie gras histology character was different in various trial groups. (4)Different level of VE tended to depress the contents of the saturated fatty acid and increased the contents of the unsaturated fatty acid in foie gras significantly (P<0.05).The contents of the unsaturated fatty acid was from 61.95% to 66.49%, and that of the saturated fatty acid was from 33.13% to 37.72% . (5)With the VE supplement increased, the composition of foie gras changed, and the quality and grade improved. When the VE level was 90 IU/kg, the contents of crude fat was 52.03%, and higher than that of the group A by 24.35% significantly (P<0.05). (6)The concentrations of serum VE and liver VE increased with the VE supplement increased significantly (P<0.05). (7) No significant difference in theconcentration of serum GSH-PX was observed among the treatment groups(P>0.05). The concentration of serum SOD increased significantly with the VE supplement increased (P<0.05). (8)There were no significant difference in the concentrations of serum lipid, IgG, IgM, T3 and cortisol in various trial groups(P>0.05).更多还原