背景:益生元被定义为一种不可消化的饲料物质,通过选择性刺激大肠中一种或有限数量的细菌的生长和/或活性而有益地影响宿主,从而改善宿主的健康和产品。
目的:本研究旨在确定在Hy-LineW-36蛋鸡日粮中添加益生元低聚果糖(FOS)的效果。
方法:总共168只Hy-LineW-36蛋鸡被分配到四个日粮水平的FOS(0、1.0、2.0、3.0g/kg日粮),在63-74期间6个重复,每个7只鸟。使用完全随机设计进行实验。
结果:生产性能没有受到FOS补充的显著影响。体重增加随着饮食中FOS水平的增加而线性降低(p<0.01)。然而,蛋壳强度,壳厚度和Ca和P百分比没有显着影响,就像抗绵羊红细胞滴度一样,血液参数和血液代谢产物。在实验的第一阶段(63-65周),与对照组相比,3.0g/kg剂量的FOS的形状指数和Haugh单位显着增加和减少,分别为(p<0.05)。在第三和第四个时期(69-71和72-74周龄),FOS对鸡蛋内部品质性状无显著影响。此外,FOS在大多数饱和脂肪酸(SFAs)中呈线性下降,包括妄语,棕榈,脂肪酸和硬脂酸;一些单非SFA(MUFA;棕榈油酸和银杏酸),和多不饱和脂肪酸(γ-亚麻酸和二十碳三烯酸)。
结论:在商品蛋鸡的日粮中添加不同水平的FOS对蛋鸡的表现没有显着影响,免疫反应和血液参数,而对某些内部蛋品质性状和蛋黄脂肪酸含量有显着影响。
BACKGROUND: A prebiotic is defined as an indigestible feed substance that beneficially affects the host by selectively stimulating the growth and/or activity of one or a limited number of bacteria in the large intestine, thereby improving host health and products.
OBJECTIVE: This study was conducted to determine the effects of supplementing prebiotic fructooligosaccharide (FOS) to the diets of Hy-Line W-36 laying hens.
METHODS: A total of 168 Hy-Line W-36 laying hens were allocated to four dietary levels of FOS (0, 1.0, 2.0, 3.0 g/kg diet), 6 replicates of 7 birds each during 63-74. The experiment was performed using a completely randomized design.
RESULTS: Productive performance was not significantly affected by the FOS supplementation. Body weight gain was linearly decreased with increasing FOS levels in the diet (p < 0.01). However, eggshell strength, shell thickness and Ca and p percentages were not significantly affected, as were anti-sheep red blood cell titres, blood parameters and blood metabolites. In the first period of the experiment (63-65 weeks), shape index and Haugh unit at the dose of 3.0 g/kg FOS were significantly increased and decreased in comparison with control, respectively (p < 0.05). In the third and fourth periods (69-71 and 72-74 weeks of age), the FOS had no significant effect on the internal egg quality traits. Furthermore, FOS had a linear decrease in the most saturated fatty acids (SFAs), including myristic, palmitic, margaric and stearic fatty acids; some of the mono-un-SFA (MUFA; palmitoleic and ginkgolic acids), and poly-unsaturated fatty acids (γ-linolenic and eicosatrienoic).
CONCLUSIONS: Supplementing different levels of FOS to the diet of commercial laying hens had no significant effect on the layers\' performance, immune response and blood parameters, whereas there was a significant effect on some of the internal egg quality traits and egg yolk fatty acid contents.