反刍动物后肠道对碳水化合物的消化吸收研究进展

本文就反刍动物后肠道的容积、食糜存留时间、微生物、淀粉及纤维物质的消化能力及影响因素、VFA的产生与吸收以及后肠道对碳水化合物消化能力与利用等方面进行了综述。后肠道的内容物相当于瘤胃的 15 %～2 6 % ,大肠食糜存留时间为 10～ 2 9h ,5 %～ 30 %的纤维素和 30 %～ 4 0 %半纤维素在大肠消化 ,产生的VFA相当于总产量的 8%～ 17% ,提供相当于进食量 8.6 %的代谢能 ,满足机体 5 %～ 13%的葡萄糖需要。

Advance in Carbohydrate Digestion and Absorption in Hindgut of Ruminants

The paper summaries the volume of contents, retention times of ingesta, microbial population, digestion and absorption of starch and cell wall carbohydrates and VFA production and absorption in hindgut of ruminants. The volume of contents in hindgut is equivalent to 15% to 26% of the volume of contents in rumen. Retention times of ingesta in the large intestine is 10 to 29 h. The digested cellulose and hemicellulose in hindgut can account for 5% to 30% and 30% to 40% of the total digested daily. The VFA production in hindgut can account for 8% to 17% of the total produced daily to provide 8.6% ME of intake and satisfy 5% to 13% glucose requirement.