育肥羊饲喂全混合日粮条件下瘤胃固相食糜外流速度及其有效降解率的评定

发布时间：2018-04-23 19:33

本文选题：瘤胃 + 外流速度　；参考：《中国畜牧兽医》2017年02期

【摘要】：试验旨在测定育肥羊饲喂全混合日粮(TMR)条件下瘤胃食糜外流速度(Kp)及干物质(DM)、有机物(OM)及粗蛋白质(CP)的有效降解率。选取3只安装有永久性瘤胃瘘管、体重(30.0±3.7)kg的哈萨克公羔羊作为试验动物,代谢笼内单笼饲养。按3×3拉丁方试验设计,分别饲喂3种能量水平一致而CP水平不同(11%、12%和13%)的TMR。采用醋酸镱(Yb-ac)作为固相食糜标记物,测定镱(Yb)元素的浓度,绘制浓度衰减曲线,利用非线性回归法拟合其Kp,并计算全混合日粮的瘤胃有效降解率。结果显示,3种TMR的瘤胃固相食糜的Kp值分别为6.71、6.66和7.59%/h,TMR1的DM、OM和CP的有效降解率分别为39.82%、38.58%和43.87%;TMR2的为35.70%、34.40%和36.86%;TMR3的为42.46%、41.29%和51.28%。3种TMR的DM在瘤胃中的有效停留时间分别为26.49、28.98和21.73h。此结果为进一步评定TMR的DM及过瘤胃氨基酸的小肠消化率研究提供了重要参数。
[Abstract]:The experiment was designed to determine the effective degradation rate of the rumen flow rate (Kp) and dry matter (DM), organic matter (OM) and crude protein (CP) in the fed sheep fed with full mixed diet (TMR). 3 Kazakh lambs with permanent rumen fistula and weight (30 + 3.7) kg were selected as experimental animals and kept in a single cage in the metabolic cage. 3 x 3 Latin squares were used. The experiment was designed to feed ytterbium acetate (Yb-ac) as a solid meal marker in the same CP levels (11%, 12% and 13%), respectively, to determine the concentration of ytterbium (Yb) elements, to draw the concentration attenuation curve, to use the nonlinear regression method to fit the Kp, and to calculate the effective rate of rumen degradation in all mixed diets. The results showed that 3 kinds of TMR were TMR. The Kp values of the rumen solid soil were 6.71,6.66 and 7.59%/h, and the effective degradation rates of DM, OM and CP in TMR1 were 39.82%, 38.58% and 43.87%, respectively, and TMR2 were 35.70%, 34.40% and 36.86%, and TMR3 was 42.46%, 41.29% and 51.28%.3 TMR in the rumen The study of small intestinal digestibility of rumen protected amino acids provides important parameters.

【作者单位】：石河子大学动物科技学院;
【基金】：国家自然基金项目(31260557) 兵团博士资金专项(2013BB018)
【分类号】：S826.5

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