甘露寡糖对泌乳早期奶牛瘤胃发酵及生产性能影响的研究

发布时间：2018-05-15 09:46

本文选题：甘露寡糖 + 中国荷斯坦奶牛　；参考：《饲料工业》2017年17期

【摘要】：试验旨在研究甘露寡糖(mannan-oligosaccharides MOS)对泌乳早期奶牛瘤胃发酵及生产性能的影响。选择4头泌乳天数为20 d,日产奶量30 kg左右,体重550 kg左右的经产(二胎)中国荷斯坦泌乳奶牛,随机分为两组,对照组饲喂基础日粮,试验组饲喂在基础日粮中添加60 g的试验日粮,采用2×2交叉试验设计,每期21 d。结果表明:添加甘露寡糖可以显著提高奶牛瘤胃中总的挥发酸和氨态氮的含量(P0.05),其中瘤胃液中乙酸含量有极显著差异(P0.01),丙酸、丁酸的含量无显著差异(P0.05)。对奶样进行分析,添加甘露寡糖可以显著提高乳脂率(P0.05),并且明显降低乳中体细胞数(P0.05),产奶量、乳蛋白和乳中尿素氮浓度均无显著差异(P0.05)。试验表明,在日粮中添加甘露寡糖有助于提高奶牛瘤胃乙酸发酵比例,提高奶牛乳脂率。
[Abstract]:The purpose of this study was to study the effects of mannan-oligosaccharides (MOSs) on rumen fermentation and production performance in early lactation cows. Four Chinese Holstein lactating cows with daily milk yield of about 30 kg and body weight of about 550 kg were randomly divided into two groups. The control group was fed with basal diet. The experimental group was fed with 60 g trial diet supplemented with basic diet, and was designed by 2 脳 2 cross-experiment for 21 days per period. The results showed that the addition of mannose oligosaccharide could significantly increase the contents of total volatile acid and ammonia nitrogen in the rumen of dairy cows, and there was a significant difference in the content of acetic acid, propionic acid and butyric acid in rumen fluid. There was no significant difference in the contents of acetic acid, propionic acid and butyric acid in rumen fluid. The milk samples were analyzed. The addition of mannose oligosaccharide could significantly increase the milk fat rate and decrease the number of somatic cells in milk. There was no significant difference in milk yield, milk protein and urea nitrogen concentration between milk samples and milk samples. The results showed that the addition of mannose oligosaccharide to the diet could increase the fermentation ratio of acetic acid in rumen and increase the milk fat ratio of dairy cows.
【作者单位】：宁夏大学;
【基金】：国家自然基金“寡糖对奶牛瘤胃纤维降解及乳脂下降综合症调控的研究”[31460619]
【分类号】：S823.5

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