PMID: 9164243May 1, 1997Paper

Plant limitations to fiber digestion and utilization

The Journal of Nutrition
D R Buxton, D D Redfearn

Abstract

Energy availability from forages is limited by fiber concentration because fiber is slowly and incompletely digested, whereas cell solubles are almost completely digested. Thus, the proportion of fiber to cell solubles is a major determinant of energy availability in forages. Grasses normally have more fiber than legumes, especially in leaves. Grass fiber is more digestible than that of legumes, but that of legumes digests at a faster rate. Ruminants digest 40-50% of legume fiber and 60-70% of grass fiber. Some fiber cannot be digested no matter how long it remains in the rumen. Lignin is thought to interfere with microbial degradation of fiber polysaccharides by acting as a physical barrier and by being cross-linked to polysaccharides by ferulate bridges. In addition to the effects of lignin, physical and structural barriers may limit fiber digestibility. Because the middle lamella and primary wall of thick-walled cells are so highly lignified, many cells can be digested only from the interior of the cell. For many cells, access to cell interiors is limited because of large particle sizes. Forage digestibility could be improved by reducing the amount of lignified cells or by developing improved cultivars so that lignified cell...Continue Reading

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May 6, 2019·Animals : an Open Access Journal From MDPI·Asep I M AliEva Schlecht
May 23, 2012·Journal of Dairy Science·K L Kammes, M S Allen
Feb 7, 2018·Journal of the Science of Food and Agriculture·Girma GetachewEdward J DePeters
Apr 13, 2018·Asian-Australasian Journal of Animal Sciences·Seongjin OhNag-Jin Choi
Sep 24, 2014·Animal : an International Journal of Animal Bioscience·A K S SchulzeM R Weisbjerg
Apr 6, 2016·Frontiers in Plant Science·Zan WangYingjun Zhang
Jul 31, 2020·Animals : an Open Access Journal From MDPI·Wen Yang ChuangTzu-Tai Lee
Dec 19, 2007·Plant Biotechnology Journal·Marcia M de O BuanafinaPhillip Morris
Feb 1, 2011·Journal of Applied Genetics·Suresh Kumar
Mar 29, 2014·Animal : an International Journal of Animal Bioscience·B KambashiJ Bindelle
Aug 13, 2011·Ecological Applications : a Publication of the Ecological Society of America·Karine DancoseXulin Guo
Dec 19, 2017·Journal of Dairy Science·Franziska SchulzAndreas Susenbeth
Jun 28, 2017·Ecological Applications : a Publication of the Ecological Society of America·Tara J ZaminPaul Grogan
Jun 1, 2017·Animal : an International Journal of Animal Bioscience·M JohansenM R Weisbjerg
May 1, 1997·The Journal of Nutrition·G A Varga, E S Kolver
Jan 13, 2021·International Journal of Biological Macromolecules·Shuaifeng GuXianghui Zhao
Aug 8, 2021·Animals : an Open Access Journal From MDPI·Wen-Yang ChuangTzu-Tai Lee

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