复合缓冲剂对奶山羊瘤胃、血液营养物质代谢及乳品质的影响

发布时间：2018-02-09 18:32

本文关键词： 复合缓冲剂高精料日粮奶山羊瘤胃血液营养物质乳品质　出处：《江苏农业科学》2017年09期 　论文类型：期刊论文

【摘要】：为了研究长期饲喂高精料日粮下添加复合缓冲剂(碳酸氢钠、氧化镁、丁酸钠)对奶山羊营养物质代谢与乳品质的影响,选择8头安装瘤胃瘘管处于泌乳中期的奶山羊,随机分为2组,分别饲喂基础日粮(高精料日粮组,HG)和基础日粮+复合缓冲剂(高精料日粮+复合缓冲剂组,BG),试验期为4个月。结果显示,与HG组相比,复合缓冲剂能显著提高瘤胃液乙酸、丁酸、总挥发性脂肪酸的浓度,乙酸与丙酸比值(A/P),乙酸丁酸之和与丙酸比值[(A+B)/P]以及瘤胃液p H值(P0.05);同时,复合缓冲剂能提高颈静脉血液中乙酸、丁酸、总挥发性脂肪酸的浓度(P0.05)、显著提高A/P、(A+B)/P比值(P0.05);添加复合缓冲剂能显著降低血糖浓度以及His、Lys、Phe浓度(P0.05),有降低Arg、Leu、Val、Orn浓度的趋势(0.05P0.10);对血浆中非蛋白氨基酸有一定的影响。综合试验结果表明,在长期高精料日粮饲喂下,添加复合缓冲剂能改变瘤胃发酵类型,影响机体营养物质代谢,最终有效提高产乳量、改善乳品品质。
[Abstract]:In order to study the effects of compound buffer (sodium bicarbonate, magnesium oxide, sodium butyrate) on nutritional metabolism and milk quality of dairy goats fed with high concentrate diet for a long time, 8 dairy goats with rumen fistula in the middle lactation period were selected. Two groups were randomly divided into two groups, which were fed basic diet (high concentrate diet group) and basal diet compound buffer group (high concentrate diet compound buffer group) for 4 months. The results showed that compared with HG group. The concentration of acetic acid, butyric acid and total volatile fatty acids in rumen fluid, the ratio of acetic acid to propionic acid, the sum of acetic acid to propionic acid, the ratio of butyric acid to propionic acid, and the pH value of rumen fluid were significantly increased by the compound buffer. Compound buffer can improve acetic acid and butyric acid in jugular blood. The concentration of total volatile fatty acids and the ratio of A / P / P to A / P / P were significantly increased, and the concentration of blood glucose and the concentration of Hishis Lysn Phe were significantly decreased by adding compound buffers, which showed a tendency of decreasing the concentration of Argophane Leuutii Valo Orn (0.05P0.10), which had a certain effect on plasma non-protein amino acids. The results of the combined test show that, Under the long-term high concentrate diet, the addition of compound buffer could change the type of rumen fermentation, affect the metabolism of nutrients, and improve the milk yield and dairy quality.
【作者单位】：南京农业大学动物科技学院;
【基金】：国家“973”计划项目(编号:2011CB100802)
【分类号】：S827.5

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