菊粉对蛋鸡生产性能、蛋品质、肠道微生物区系和血清及蛋黄胆固醇的影响。

Effects of inulin on performance, egg quality, gut microflora and serum and yolk cholesterol in laying hens.

College of Animal Science and Technology, Northwest A & F University, Yangling, China.

Br Poult Sci. 2010 Dec;51(6):791-6. doi: 10.1080/00071668.2010.531005.

Abstract

The present study was conducted to investigate the effects of inulin on laying hens. A total of 360 Brown Nick laying hens were divided randomly into 6 groups of 60 with 6 replicates of 10 hens and fed on diets containing 0 (control), 0·1, 0·5, 1·0, 1·5 or 2·0% inulin during the 4-week trial. 2. Dietary supplementation of inulin reduced cholesterol concentration (mg/g yolk) and content (mg/egg) in eggs. Cholesterol content in eggs decreased linearly with increasing levels of dietary inulin level. 3. Supplementation of inulin in diets decreased coliform bacteria counts and pH in the caecum. The lowest coliform bacteria counts (6·30 ± 0·03 log10 cfu/g) and pH (6·47 ± 0·01) were obtained in the 2·0% inulin group, the two indices decreasing by 21·6% and 3·0% respectively, compared with the control group. Coliform bacteria count and pH were changed linearly in accordance with increasing levels of dietary inulin level. Caecal Bifidobacteria counts were increased in the 2·0%-inulin group. 4. Inulin supplementation of layer diets did not appear to have any adverse effects on laying rate, egg weight, feed intake, feed conversion efficiency, cracked-egg rate, eggshell thickness or Haugh unit compared with the control laying hens. 5. Therefore, dietary supplementation with inulin may lead to the development of low-cholesterol chicken eggs as demanded by health-conscious consumers.

摘要

本研究旨在探讨菊糖对蛋鸡的影响。将 360 只褐尼克蛋鸡随机分为 6 组，每组 60 只，每组 10 只，在 4 周试验期间，分别饲喂含 0（对照）、0·1、0·5、1·0、1·5 或 2·0%菊糖的日粮。
日粮中添加菊糖可降低蛋黄中胆固醇浓度（mg/g 蛋黄）和含量（mg/枚蛋）。蛋黄胆固醇含量随日粮菊糖水平的增加呈线性下降。
日粮中添加菊糖可降低盲肠中大肠杆菌数量和 pH 值。在 2·0%菊糖组中，大肠杆菌数量（6·30±0·03log10cfu/g）和 pH 值（6·47±0·01）最低，分别比对照组降低 21.6%和 3.0%。大肠杆菌数量和 pH 值随日粮菊糖水平的增加呈线性变化。盲肠双歧杆菌数量在 2·0%菊糖组中增加。
与对照组蛋鸡相比，日粮中添加菊糖对产蛋率、蛋重、采食量、饲料转化率、破蛋率、蛋壳厚度或哈夫单位均无不良影响。
因此，日粮中添加菊糖可能会生产出符合注重健康的消费者需求的低胆固醇鸡蛋。