不同精粗比饲粮中添加甘露寡糖对绵羊瘤胃养分降解率的影响

发布时间：2019-03-06 17:06

【摘要】：本试验采用尼龙袋法研究不同精粗比饲粮中添加甘露寡糖(MOS)对绵羊瘤胃养分降解率的影响。选取6只安装永久瘤胃瘘管的羯羊(白萨福克×小尾寒羊♀),采用4×6双因子析因试验设计,共设饲粮精粗比和MOS添加水平2个因子,其中饲粮精粗比分别为20∶80(A1)、30∶70(A2)、40∶60(A3)和50∶50(A4),MOS添加水平分别为0(B1)、0.4%(B2)、0.8%(B3)、1.2%(B4)、1.6%(B5)和2.0%(B6)。结果显示:饲粮精粗比对不同时间点绵羊瘤胃干物质(DM)、有机物(OM)和粗蛋白质(CP)的降解率、降解参数[DM、OM:快速降解部分(a)、慢速降解部分(b)和可降解部分(a+b);CP:a、b和b的降解速率(c)]及有效降解率均产生了显著影响(P0.05),其变化规律均为随饲粮精料比例的升高而升高,在A4组达到最高;MOS添加水平仅对不同时间点绵羊瘤胃CP的降解率及降解参数a+b产生了显著影响(P0.05),其变化规律均为随MOS添加水平的增加先升高后降低,在B5组达到最高。饲粮精粗比和MOS添加水平对绵羊瘤胃养分降解率没有产生显著的交互作用(P0.05)。由此得出,饲粮精粗比为50∶50时绵羊瘤胃干物质、有机物和粗蛋白质的有效降解率最高,MOS添加水平达到1.6%时绵羊瘤胃粗蛋白质的降解率最高。
[Abstract]:The effect of mannose oligosaccharide (MOS) on rumen nutrient degradation rate of sheep was studied by nylon bag method. Six Capricorn sheep with permanent rumen fistula (White Suffolk 脳 small tail Han Sheep) were selected and designed with 4 脳 6 double factorial design. Two factors, concentrate to roughage ratio and level of MOS addition, were designed, in which the feed concentrate / roughage ratio was 20:80 (A1), respectively. 30:70 (A2), 40:60 (A3) and 50:50 (A4), MOS addition levels were 0 (B1), 0.4% (B2), 0.8% (B3), 1.2% (B4), 1.6% (B5) and 2.0% (B6), respectively). The results showed that the degradation rate of (DM), organic matter (OM) and crude protein (CP) (CP) in rumen dry matter of sheep at different time points and the degradation parameters [DM,OM: (rapid degradation of partial (a),)] were studied. Slow degradation of partial (b) and degradable partial (a b); The degradation rate of CP:a,b and b, (c), and the effective degradation rate were significantly affected (P0.05), and the variation regularity was increased with the increase of ration concentrate ratio, which reached the highest level in A4 group. The degradation rate and degradation parameter a / b of rumen CP in sheep rumen were significantly affected by MOS addition level at different time points (P0.05), and the change rule was that the degradation rate of rumen CP increased first and then decreased with the increase of MOS addition level, and reached the highest level in B5 group. There was no significant interaction between concentrate / roughage ratio and MOS level on rumen nutrient degradation rate of sheep (P0.05). The results showed that the effective degradation rate of organic matter and crude protein in rumen of sheep was the highest when the ratio of concentrate to roughage was 50: 50, and the degradation rate of rumen crude protein was the highest when the level of MOS was 1.6%.
【作者单位】：甘肃农业大学动物科学技术学院;
【基金】：国家自然科学基金项目(31560646)
【分类号】：S826.5

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