Zelenák I, Cerný I, Apalovic R, Dosková E, Váradiová E
Vet Med (Praha). 1977 Sep;22(9):541-50.
Sheep were subject to an experiment concerning the effect of treated beech sawdust and thickened aqueous hydrolyzate of beech wood (xylocel) on the digestibility of glycides and on the level of volatile fatty acids (VFA) in the rumen content. The results prove that the use of treated beech sawdust as a replacer for ground barley straw favourably influenced the digestibility of monosaccharides, cellulose, lignin and total dry matter of the diet. Sawdust reduced the concentration of total VFA in the rumen content but the ratio of acetic acid to propionic acid (A:P) was lower and the energetic efficiency of the VFA produced was higher in the diet containing sawdust. The addition of urea to the diet with beech sawdust conditioned less effectively, as distinct from the case mentioned above, did not give a clear effect. Urea encouraged the digestibility of pentosanes, glucose and cellulose, but reduced the energetic efficiency of the VFA produced. Xylocel had no clear effect on the digestibility of sugars either. The higher A:P ratio and the lower energetic efficiency of the VFA produced testify to the fact that xylocel in combination with beet molasses was not a sufficient replacer of sugar-beet glycides.
对绵羊进行了一项实验，研究经处理的山毛榉锯末和山毛榉木浓缩水解产物（木纤维）对糖类消化率以及瘤胃内容物中挥发性脂肪酸（VFA）水平的影响。结果表明，使用经处理的山毛榉锯末替代磨碎的大麦秸秆，对日粮中单核糖、纤维素、木质素和总干物质的消化率产生了有利影响。锯末降低了瘤胃内容物中总VFA的浓度，但在含锯末的日粮中，乙酸与丙酸的比例（A:P）较低，且所产生的VFA的能量效率较高。与上述情况不同，在含山毛榉锯末的日粮中添加尿素的调节效果较差，未产生明显效果。尿素促进了戊聚糖、葡萄糖和纤维素的消化率，但降低了所产生的VFA的能量效率。木纤维对糖类的消化率也没有明显影响。较高的A:P比例和所产生的VFA较低的能量效率证明，木纤维与甜菜糖蜜结合并非甜菜糖类的充分替代品。
