Md. Emran Hossain,
- Professor, Department of Animal Science and Nutrition, Chattogram Veterinary and Animal Sciences University, Khulshi, Chattogram, Bangladesh
Abstract
The digestibility of fiber in dairy cows is a critical factor for optimizing their nutritional efficiency and overall productivity. This study explores the key dietary, management, and environmental factors influencing fiber-digestibility in the rumen. Various aspects of feed composition, such as fiber content, protein-to-fiber ratio, and the presence of anti-nutritional factors, play a significant role in determining microbial activity and rumen fermentation efficiency. Physical feed characteristics, including particle size, feed processing methods, and forage maturity, further influence the breakdown of fiber. Environmental factors, such as ambient temperature, humidity, and heat stress, can disrupt rumen function and reduce microbial efficiency, negatively impacting fiber digestion. In addition, management practices – such as feed mixing efficiency, stocking density, and access to quality pasture – are essential for maintaining optimal rumen conditions and supporting effective fiber utilization. The study also highlights the importance of microbial diversity and the presence of specific microbial populations, including fibrolytic bacteria, in enhancing fiber digestion. Effective use of dietary interventions – such as enzyme supplementation, ionophores, and prebiotics – can further improve fiber digestibility. By understanding the interplay of these factors, this review provides insights into strategies for enhancing fiber digestion, which is essential for improving feed efficiency, animal health, and sustainable dairy farming practices
Keywords: Dairy cows, enzyme supplementation, environmental factors, feed composition, feed management, fiber digestibility
[This article belongs to Research and Reviews: A Journal of Microbiology and Virology ]
References
- Zebeli Q, Aschenbach JR, Tafaj M, Boguhn J, Ametaj BN, Drochner W. Invited review: Role of physically effective fiber and estimation of dietary fiber adequacy in high-producing dairy cattle. J Dairy Sci. 2012;95(3):1041–1056. doi: 3168/jds.2011-4421.
- Zhao XH, Zhang T, Xu M, Yao JH. Effects of physically effective fiber on chewing activity, ruminal fermentation, and digestibility in goats. J Anim Sci. 2011;89(2):501–509. doi: 2527/jas.2010-3013.
- Galyean ML, Goetsch AL. Utilization of forage fiber by ruminants. Forage Cell Wall Struct Dig. 2015:33–71. doi: 2134/1993.foragecellwall.c2.
- Fustini M, Palmonari A, Canestrari G, Bonfante E, Mammi LU, Pacchioli MT, Sniffen GC, Grant RJ, Cotanch KW, Formigoni A. Effect of undigested neutral detergent fiber content of alfalfa hay on lactating dairy cows: Feeding behavior, fiber digestibility, and lactation performance. Journal of dairy science. 2017 Jun 1;100(6):4475-83.
- Shi R, Dong S, Mao J, Wang J, Cao Z, Wang Y, Li S, Zhao G. Dietary neutral detergent fiber levels impacting dairy cows’ feeding behavior, rumen fermentation, and production performance during the period of peak-lactation. Animals. 2023 Sep 10;13(18):2876.
- Beane KE, Redding MC, Wang X, Pan JH, Le B, Cicalo C, Jeon S, Kim YJ, Lee JH, Shin EC, Li Y. Effects of dietary fibers, micronutrients, and phytonutrients on gut microbiome: a review. Applied Biological Chemistry. 2021 Dec;64(1):36.
- Cavallini D, Concolino A, Mammi L, et al. Factors influencing fiber digestibility in dairy cows. J Dairy. 2020. [Online]. Available:
https://cris.unibo.it/handle/11585/804412%0Ahttps://cris.unibo.it/bitstream/11585/804412/2/PIIS002203022030816X.pdf
- Aschalew ND, Wang T, Qin GX, Zhen YG, Zhang XF, Chen X, et al. Effects of physically effective fiber on rumen and milk parameters in dairy cows: a review. 2020:1317-1323.
- Xie B, Gao J, Zhao G. Dietary supplementation with sodium sulfate improves rumen fermentation, fiber digestibility, and the plasma metabolome through modulation of rumen bacterial communities in steers. Appl Environ Microbiol. 2020;86(22):1–18. doi: 1128/AEM.01412-20.
- Makki K, Deehan EC, Walter J, Bäckhed F. The impact of dietary fiber on gut microbiota in host health and disease. Cell host & microbe. 2018 Jun 13;23(6):705-15.
- Korcz E, Kerényi Z, Varga L. Dietary fibers, prebiotics, and exopolysaccharides produced by lactic acid bacteria: Potential health benefits with special regard to cholesterol-lowering effects. Food Funct. 2018;9(6):3057–3068. doi: 1039/c8fo00118a.
- Oldick BS, Firkins JL. Effects of degree of fat saturation on fiber digestion and microbial protein synthesis when diets are fed twelve times daily. J Anim Sci. 2000;78(9):2412–2420. doi: 2527/2000.7892412x.
- Amminga ST. Influence of feeding management on ruminant fiber digestibility. Forage Cell Wall Struct Dig. 2015:571–602. doi: 2134/1993.foragecellwall.c22.
- Chen H, Wang C, Huasai S, Chen A. Effects of dietary forage to concentrate ratio on nutrient digestibility, ruminal fermentation and rumen bacterial composition in Angus cows. Sci Rep. 2021;11(1):17023. doi: 1038/s41598-021-96580-5.
- Yang K, Wei C, Zhao GY, Xu ZW, Lin SX. Effects of dietary supplementing tannic acid in the ration of beef cattle on rumen fermentation, methane emission, microbial flora and nutrient digestibility. J Anim Physiol Anim Nutr (Berl). 2017;101(2):302–310. doi: 1111/jpn.12531.
- Huhtanen P, Rinne M, Nousiainen J. A meta-analysis of feed digestion in dairy cows. 2. The effects of feeding level and diet composition on digestibility. J Dairy Sci. 2009;92(10):5031–5042. doi: 3168/jds.2008-1834.
- Oba M, Allen MS. Evaluation of the importance of the digestibility of neutral detergent fiber from forage: Effects on dry matter intake and milk yield of dairy cows. J Dairy Sci. 1999;82(3):589–596. doi: 3168/jds.S0022-0302(99)75271-9.
- Hendawy AO, Sugimura S, Sato K, Mansour MM, Abd El-Aziz AH, Samir H, Islam MA, Bostami AR, Mandour AS, Elfadadny A, Ragab RF. Effects of selenium supplementation on rumen microbiota, rumen fermentation, and apparent nutrient digestibility of ruminant animals: A review. Fermentation. 2021 Dec 24;8(1):4.
- Brask M, Lund P, Hellwing ALF, Poulsen M, Weisbjerg MR. Enteric methane production, digestibility and rumen fermentation in dairy cows fed different forages with and without rapeseed fat supplementation. Anim Feed Sci Technol. 2013;184(1–4):67–79. doi: 1016/j.anifeedsci.2013.06.006.
- Wang Y, Xia K, Wang XN, Lin X, Liu J, Li YJ, Liu XL, Zhao WJ, Zhang YG, Guo JH. Improvement of feed intake, digestibility, plasma metabolites, and lactation performance of dairy cows fed mixed silage of sugar beet pulp and rice straw inoculated with lactic acid bacteria. Journal of dairy science. 2022 Jan 1;105(1):269-80.
- Yang L, et al. Alterations in nutrient digestibility and performance of heat-stressed dairy cows by dietary L-theanine supplementation. 2022. Elsevier. doi: 10.1016/j.aninu.2022.08.002.
- Mousa GA, Allak MA, Shehata MG, Hashem NM, Hassan OG. Dietary supplementation with a combination of fibrolytic enzymes and probiotics improves digestibility, growth performance, blood metabolites, and economics of fattening lambs. Animals. 2022 Feb 15;12(4):476.
- Grossi S, Compiani R, Rossi L, Dell’Anno M, Castillo I, Sgoifo Rossi CA. Effect of slow-release urea administration on production performance, health status, diet digestibility, and environmental sustainability in lactating dairy cows. Animals. 2021 Aug 14;11(8):2405.
- Hassanat F, Benchaar C. Corn silage-based diet supplemented with increasing amounts of linseed oil: Effects on methane production, rumen fermentation, nutrient digestibility, nitrogen utilization, and milk production of dairy cows. Journal of Dairy Science. 2021 May 1;104(5):5375-90.
- Rehman A, et al. Nutrient digestibility, nitrogen excretion, and milk production of mid-lactation Jersey × Friesian cows fed diets containing different proportions of rumen-undegradable protein. 2020. SciELO Brasil. doi: 1590/0001-3765202020180787.
- Woodford JA, Jorgensen NA, Barrington GP. Impact of dietary fiber and physical form on performance of lactating dairy cows. Journal of dairy science. 1986 Apr 1;69(4):1035-47.
- Shakira G, Qubtia M, Ahmed I, Hasan F, Anjum MI, Imran M. Effect of indigenously isolated saccharomyces cerevisiae probiotics on milk production, nutrient digestibility, blood chemistry and fecal microbiota in lactating dairy cows. 2018. thejaps.org.pk. [Online]. Available: http://www.thejaps.org.pk/docs/Accepted/2007/28-2/10.pdf
- Huhtanen P, Rinne M, Nousiainen J. A meta-analysis of feed digestion in dairy cows. 2. The effects of feeding level and diet composition on digestibility. Journal of dairy science. 2009 Oct 1;92(10):5031-42.
- Bernabucci U, Lacetera N, Danieli PP, Bani P, Nardone A, Ronchi B. Influence of different periods of exposure to hot environment on rumen function and diet digestibility in sheep. Int J Biometeorol. 2009;53(5):387–395. doi: 1007/s00484-009-0223-6.
- Moallem U, Lehrer H, Livshitz L, Zachut M, Yakoby S. The effects of live yeast supplementation to dairy cows during the hot season on production, feed efficiency, and digestibility. Journal of dairy science. 2009 Jan 1;92(1):343-51.
- Sánchez NR, Ledin I. Effect of feeding different levels of foliage from Cratylia argentea to creole dairy cows on intake, digestibility, milk production and milk composition. Trop Anim Health Prod. 2006;38(4):343–351. doi: 1007/s11250-006-4314-7.
- Sales J, Janssens GPJ. Acid-insoluble ash as a marker in digestibility studies: A review. 2003. jafs.com.pl. doi: 22358/jafs/67718/2003.
- Chow LO, Baron VS, Corbett R, Oba M. Effects of planting date on fiber digestibility of whole-crop barley and productivity of lactating dairy cows. 2008;91(4). library-archives.canada.ca. doi: 3168/jds.2007-0854.
- Morsy AS, Soltan YA, El-Zaiat HM, Alencar SM, Abdalla AL. Bee propolis extract as a phytogenic feed additive to enhance diet digestibility, rumen microbial biosynthesis, mitigating methane formation and health status of late pregnant ewes. Anim Feed Sci Technol. 2021;273:114834. doi: 1016/j.anifeedsci.2021.114834.
- Zebeli Q, Tafaj M, Weber I, Dijkstra J, Steingass H, Drochner W. Effects of varying dietary forage particle size in two concentrate levels on chewing activity, ruminal mat characteristics, and passage in dairy cows. J Dairy Sci. 2007;90(4):1929–1942. doi: 3168/jds.2006-354.
- Maulfair DD, Fustini M, Heinrichs AJ. Effect of varying total mixed ration particle size on rumen digesta and fecal particle size and digestibility in lactating dairy cows. J Dairy Sci. 2011 Jul;94(7):3527–3536. doi: 3168/jds.2010-3718.
- Evangelista C, Petrocchi Jasinski F, Basiricò L, Turriziani G, Bernabucci U. Particle size distribution of total mixed rations fed to Italian Mediterranean buffaloes measured by the PSPS: Impact on milk quality and digestibility. Ital J Anim Sci. 2024;23(1):1535–1550. doi: 1080/1828051X.2024.2417714.
- Miller-Cushon EK, DeVries TJ. Effect of dietary dry matter concentration on the sorting behavior of lactating dairy cows fed a total mixed ration. J Dairy Sci. 2009;92(7):3292–3298. doi: 3168/jds.2008-1772.
- Abulaiti, A., Ahsan, U., Naseer, Z., Ahmed, Z., Liu, W., Ruan, C., Pang, X. and Wang, S., 2024. Effect of dietary Chinese herbal preparation on dry matter intake, milk yield and milk composition, serum biochemistry, hematological profile, and reproductive efficiency of Holstein dairy cows in early postpartum period. Frontiers in Veterinary Science, 11, p.1434548.
- Ncisana L, Mabhaudhi T, Mkhize NR, Ravhuhali K, Tjelele TJ, Nyathi MK, Mbambalala L, Msiza NH, Nzeru MS, Modi AT. Water regimes in selected fodder radish (Raphanus sativus) genotypes: Effects on nutritional value and in vitro ruminal dry matter degradability. Heliyon. 2024 Apr 30;10(8).
- Ahmad M, Jamil M, Ullah S, Ali M. Examine the effects of climate change on forage quality and its subsequent impact on milk yield and composition. Indus J. 2024. [Online]. Available: http://induspublishers.com/IJBR/article/view/431
- Zhou L, et al. Effects of dietary concentrate: Forage ratio on development of gastrointestinal tract in black Tibetan sheep. J Appl Anim Res. 2022;50(1):192–197. doi: 10.1080/09712119.2022.2053131.
- Yang WZ, Beauchemin KA. Increasing physically effective fiber content of dairy cow diets through forage proportion versus forage chop length: Chewing and ruminal pH. J Dairy Sci. 2009;92(4):1603–1615. doi: 3168/jds.2008-1379.
- AlZahal O, Dionissopoulos L, Laarman AH, Walker N, McBride BW. Active dry Saccharomyces cerevisiae can alleviate the effect of subacute ruminal acidosis in lactating dairy cows. 2014. Elsevier. doi: 3168/jds.2014-8212.
- Xu Q, Qiao Q, Gao Y, Hou J, Hu M, Du Y, Zhao K, Li X. Gut microbiota and their role in health and metabolic disease of dairy cow. Frontiers in nutrition. 2021 Aug 4;8:701511.
- Chaucheyras-Durand F, Walker ND, Bach A. Effects of active dry yeasts on the rumen microbial ecosystem: Past, present and future. Anim Feed Sci Technol. 2008;145(1–4):5–26. doi: 1016/j.anifeedsci.2007.04.019.
- Anadón A, Ares I, Martínez-Larrañaga MR, Martínez MA. Prebiotics and probiotics in feed and animal health. Nutraceuticals Vet Med. 2019:261–285. doi: 1007/978-3-030-04624-8_19.
- Nova E, Gómez-Martinez S, González-Soltero R. The influence of dietary factors on the gut microbiota. 2022. mdpi.com. doi: 3390/microorganisms10071368.
- Wu S, Bhat ZF, Gounder RS, Mohamed Ahmed IA, Al-Juhaimi FY, Ding Y, Bekhit AE. Effect of dietary protein and processing on gut microbiota—A systematic review. Nutrients. 2022 Jan 20;14(3):453.
- Kumar Singh A, Cabral C, Kumar R, Ganguly R, Kumar Rana H, Gupta A, Rosaria Lauro M, Carbone C, Reis F, Pandey AK. Beneficial effects of dietary polyphenols on gut microbiota and strategies to improve delivery efficiency. Nutrients. 2019 Sep 13;11(9):2216.
- Uyeno Y, Shigemori S, Shimosato T. Effect of probiotics/prebiotics on cattle health and productivity. Microbes Environ. 2015;30(2):126–132. doi: 1264/jsme2.ME14176.
- Rojas OJ, Stein HH. Processing of ingredients and diets and effects on nutritional value for pigs. 2017. Springer. doi: 1186/s40104-017-0177-1.
- Wanapat M, Polyorach S, Boonnop K, Mapato C, Cherdthong A. Effects of treating rice straw with urea or urea and calcium hydroxide upon intake, digestibility, rumen fermentation and milk yield of dairy cows. Livest Sci. 2009;125(2–3):238–243. doi: 1016/j.livsci.2009.05.001.
- Dehghan-banadaky M, Corbett R, Oba M. Effects of barley grain processing on productivity of cattle. Anim Feed Sci Technol. 2007;137(1–2):1–24. doi: 1016/j.anifeedsci.2006.11.021.
- Zoabi H, Ammar H, Ghzayel S, Aziz BA, Kholif AE, Díaz A, de Haro-Martí M, Chahine M, López S. Feeding sodium hydroxide-treated almond hulls to assaf sheep: effects on chemical composition, nutrient digestibility, and zootechnical performance. Agriculture. 2025 May 5;15(9):1000.
- Giallongo F, Hristov AN, Oh J, Frederick T, Weeks H, Werner J, Lapierre H, Patton RA, Gehman A, Parys C. Effects of slow-release urea and rumen-protected methionine and histidine on performance of dairy cows. Journal of dairy science. 2015 May 1;98(5):3292-308.
- Varga GA, Kolver ES. Microbial and animal limitations to fiber digestion and utilization. 1997. Elsevier. doi: 1093/jn/127.5.819s.
- Yan T, Mayne CS, Porter MG. Effects of dietary and animal factors on methane production in dairy cows offered grass silage-based diets. Int Congr Ser. 2006;1293:123–126. doi: 1016/j.ics.2006.02.024.
- Piluzza G, Sulas L, Bullitta S. Tannins in forage plants and their role in animal husbandry and environmental sustainability: A Grass Forage Sci. 2014;69(1):32–48. doi: 10.1111/gfs.12053.
- Adesogan AT, Ma ZX, Romero JJ, Arriola KG. Ruminant Nutrition Symposium: Improving cell wall digestion and animal performance with fibrolytic enzymes. J Anim Sci. 2014;92(4):1317–1330. doi: 2527/jas.2013-7273.
- El-Zaiat HM, Al-Marzooqi W, Al-Kharousi K. Effects of chitosan-based additive on rumen fermentation and microbial community, nutrients digestibility and lactation performance in goats. J Anim Physiol Anim Nutr (Berl). 2024. doi: 1111/jpn.14057.
- Ferraretto LF, Shaver RD, Bertics SJ. Effect of dietary supplementation with live-cell yeast at two dosages on lactation performance, ruminal fermentation, and total-tract nutrient digestibility in dairy cows. 2012. Elsevier. doi: 3168/jds.2011-5190.
- Bernabucci U, Bani P, Ronchi B, Lacetera N, Nardone A. Influence of short- and long-term exposure to a hot environment on rumen passage rate and diet digestibility by Friesian heifers. J Dairy Sci. 1999;82(5):967–973. doi: 3168/jds.S0022-0302(99)75316-6.

Research and Reviews: A Journal of Microbiology and Virology
| Volume | 16 | |
| Issue | 02 | |
| Received | 25/05/2026 | |
| Accepted | 27/06/2026 | |
| Published | 28/06/2026 | |
| Publication Time | 34 Days |