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A review on newer trends in the use of exogenous fibrolytic enzymes use in the ruminants

Continuous efforts are being made to utilize the fibre feeds to the maximum extent in ruminants which form a staple feed in tropical countries. Though only about 65% of the fibre is effectively digested in the rumen, need to supplement certain exogenous fibrolytic enzymes (EFE) has become mandatory. The main principle with which EFE is added is to specifically target the increased bacterial multiplication of certain species which enhances rumen degradation of cellulose which constitutes the major part of the forages. | Int.J.Curr.Microbiol.App.Sci 2020 9 10 2242-2249 International Journal of Current Microbiology and Applied Sciences ISSN 2319-7706 Volume 9 Number 10 2020 Journal homepage http www.ijcmas.com Review Article https doi.org 10.20546 ijcmas.2020.910.271 A Review on Newer Trends in the Use of Exogenous Fibrolytic Enzymes Use in the Ruminants M.V.A.N. Suryanarayana Department of Livestock Farm Complex College of Veterinary Science Sri Venkateswara Veterinary University Tirupati-517501 A P India Corresponding author ABSTRACT Continuous efforts are being made to utilize the fibre feeds to the maximum extent in ruminants which form a staple feed in tropical countries. Though only about 65 of the fibre is effectively digested in the rumen need to supplement certain exogenous fibrolytic enzymes EFE has become mandatory. The main principle with which EFE is added is to specifically target the increased bacterial multiplication of certain species which enhances rumen degradation of cellulose which constitutes the major part of the forages. Effectiveness of enzymes in animal nutrition depends on i type ii source iii level of supplemented enzymes iv the type of diet fed v animal health and vi animal productivity. Exogenous enzymes are classified into cellulolytic amylolytic proteolytic and others based on the type of substrate on which they act. The mode of application of EFE incubation with the substrate is also crucial. Solubulized enzymes incubated with the substrate is Keywords more effective since the enzymes starts acting on the substrate forming a stable complex resistant to EFE Forages endogenous enzymes even before entering into the rumen. Supplementation of White-rot fungi in Rumen degradation recent times improved the digestibility of the so called tough lignocellulosic bonded substrates fed to Cellulose Crop ruminants. Supplementation of EFE to silage can hydrolyze plant cell walls into fermentable residues substrates through enhanced homolactic fermentation and thus