Graham H, Hesselman K, Aman P
J Nutr. 1986 Feb;116(2):242-51. doi: 10.1093/jn/116.2.242.
The influence of added wheat bran or dried sugar-beet pulp on the apparent digestion of dietary components was examined in pigs fitted with duodenal and terminal ileal cannulas. The pigs were fed a basal cereal-based diet alone or substituted at a level of 33% by wheat bran or beet pulp. Neither fibrous component influenced the digestibility of starch, but inclusion of beet pulp decreased dry matter content and digestibility of ash, protein and fat in the ileum and fecal digestibility of fat. Between 11 and 37% of the nonstarch polysaccharides were degraded anterior to the ileum, and the percentage of beet pulp diet nonstarch polysaccharides that was soluble increased from 11% in the feed to 35% at the ileum. Xylose and glucose were the least degraded nonstarch polysaccharide residues in all three diets, and the non-starch polysaccharide residues varied in susceptibility to breakdown within and between diets, depending on the composition of the fiber. Almost 50% of the beet pulp, but less than 20% of the wheat bran, was degraded in the large intestine. The inclusion of wheat bran and beet pulp increased fecal output by 127 and 56%, respectively.
在装有十二指肠和回肠末端插管的猪身上，研究了添加麦麸或干甜菜粕对日粮成分表观消化率的影响。给猪单独饲喂以谷物为基础的基础日粮，或以33%的水平用麦麸或甜菜粕替代。两种纤维成分均未影响淀粉的消化率，但添加甜菜粕降低了回肠中干物质含量以及灰分、蛋白质和脂肪的消化率，以及粪便中脂肪的消化率。11%至37%的非淀粉多糖在回肠之前被降解，甜菜粕日粮中非淀粉多糖的可溶百分比从饲料中的11%增加到回肠中的35%。木糖和葡萄糖是所有三种日粮中降解最少的非淀粉多糖残基，非淀粉多糖残基在日粮内部和日粮之间的分解敏感性有所不同，这取决于纤维的组成。在大肠中，近50%的甜菜粕被降解，但麦麸的降解率不到20%。添加麦麸和甜菜粕分别使粪便产量提高了127%和56%。
