| 摘要: |
| 对反刍动物淀粉消化与葡萄糖吸收的研究进展进行了综述,讨论了限制小肠消化淀粉的因素及影响小肠葡萄糖吸收的因素,探讨了淀粉消化位点对整体能量效率的影响.分析认为,淀粉在小肠消化的能量效率较瘤胃发酵高.评价淀粉在小肠的利用效率,不能只考虑瘤胃淀粉发酵造成的潜在能量损失,还需要评定小肠葡萄糖吸收对代谢葡萄糖的贡献和大肠淀粉发酵的能量损失及对反刍动物健康的影响.因此,精确预测流入小肠并能完全消化吸收的淀粉数量,对反刍动物生产性能的改善至关重要. |
| 关键词: 反刍动物 葡萄糖吸收 淀粉消化 |
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| 基金项目:西南大学荣昌校区科研资助项目 |
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| Research progress on starch digestion and glucose absorption in ruminants |
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| Abstract: |
| The purpose of this review is to introduce the research progress on starch digestion and glucose absorption in ruminants.Factors limiting starch digestion and influencing glucose absorption in small intestine are discussed.Effects of the different sites of starch digestion on whole-body energetic efficiency are debated.In fact,the energetic efficiency of digested starch in the small intestine is higher than that of ruminally fermented starch.However,it is not enough to consider separately the potential energy loss as a result of starch fermentation in the rumen for evaluating the efficiency of utilization about starch in the small intestine.Therefore,it is indispensable to evaluate the contribution of glucose absorbed from the small intestine to metabolizable glucose and the potential energy loss and healthy benefit as a result of starch fermentation in the large intestine. Consequently,the optimal performance may be highly dependent on the ability to accurately predict the quantity of starch flowing to and disappearing from the small intestine. |
| Key words: ruminant glucose absorption starch digestion |
