Use of Exogenous Fibrolytic Enzymes to Improve Feed Utilization by Ruminants

@article{Beauchemin2003UseOE,
  title={Use of Exogenous Fibrolytic Enzymes to Improve Feed Utilization by Ruminants},
  author={Karen A Beauchemin and Dar{\'i}o Colombatto and Diego P. Morgavi and W. Z. Yang},
  journal={Journal of Animal Science},
  year={2003},
  volume={81},
  pages={37-47}
}
Research has demonstrated that supplementing dairy cow and feedlot cattle diets with fiberdegrading enzymes has significant potential to improve feed utilization and animal performance. Ruminant feed enzyme additives, primarily xylanases and cellulases, are concentrated extracts resulting from bacterial or fungal fermentations that have specific enzymatic activities. Improvements in animal performance due to the use of enzyme additives can be attributed mainly to improvements in ruminal fiber… 
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399 Citations

Improving Forage Quality and Animal Performance with Fibrolytic Enzymes
TLDR
The intention in this paper is to review the literature on the effects of enzyme application to feeds at ensiling or feeding, and to present the results of certain preliminary studies aimed at improving the utilization of tropical forages with fibrolytic enzymes.
Effect of Exogenous Enzymes on Ruminal degradation of Feed and Animal Performance: A review
TLDR
The better understanding of the production techniques, enzyme activity, mode of enzyme action and application techniques of commercial non starch polysaccharidase enzymes can help the scientific community for competent utilization of these biotechnological products for efficient utilization of the available feed resources.
Enzymes for Nutritional Enrichment of Agro-Residues as Livestock Feed
Mode of action of exogenous cell wall degrading enzymes for ruminants
TLDR
Adding exogenous enzymes to the diet increases the hydrolytic capacity of the rumen mainly due to increased bacterial attachment, stimulation of rumen microbial populations and synergistic effects with hydrolases of ruminal microorganisms.
Ruminant Nutrition Symposium: Improving cell wall digestion and animal performance with fibrolytic enzymes.
This paper aimed to summarize published responses to treatment of cattle diets with exogenous fibrolytic enzymes (EFE), to discuss reasons for variable EFE efficacy in animal trials, to recommend…
Fibrolytic enzymes improving in vitro rumen degradability of tropical forages.
TLDR
The results indicated that the use of fibrolytic enzymes can be a reliable strategy to improve degradability of low-quality forages, contributing to the sustainability and intensification of livestock production in tropical countries.
Effects of dietary fibrolytic enzymes on chewing time, ruminal fermentation, and performance of mid-lactating dairy cows
Effect of adding fibrolytic enzymes to dairy cow rations on digestive activity in the rumen.
the objective of the study was to determine whether supplementing the rations of red-and-white Polish holstein-friesian dairy cows with exogenous fibrolytic enzymes in the form of fibrozymetm…
EFFECT OF EXOGENOUS FIBROLYTIC ENZYMES ON RUMINANT PERFORMANCE
J J The' objective of this paper is to examine the role of exogenous fibrolytic enzymes on ruminant productivity. These fibrolytic enzymes have been reported to be effective to increase feed…
Supplementation of exogenous fibrolytic enzyme in livestock nutrition
TLDR
Exogenous fibrolytic enzymes can be used to increase utilization of feed and increase production of the animals, which help in degradation of specific bond, anti nutritional factors present in the feed, changes in the micro flora profile in the small and large intestine.
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References

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TLDR
Increased intake of digestible energy due to enzyme supplementation did not increase milk yield or milk component yield, and further research is necessary to determine the mechanism by which adding a fibrolytic enzyme mixture enhanced intake, but only increased feed digestion when used at a low level.
Influence of supplementary fibrolytic enzymes on the fermentation of corn and grass silages by mixed ruminal microorganisms in vitro.
TLDR
It was concluded that enzyme activity, probably a type of endo-(beta-1,4)-glucanase activity, limits the rate of fermentation of corn and grass silage in the rumen and treatment of the ration prefeeding will be key to harnessing the potential of exogenous fibrolytic enzymes in ruminant nutrition.
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TLDR
The synergistic effect between ruminal and exogenous enzymes increases the hydrolytic potential within the rumen environment and is likely a significant mechanism by which enzyme additives improve feed digestion in ruminants.
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TLDR
It is demonstrated that using a fibrolytic enzyme mixture in high-grain diets that contain mainly barley grain can improve fiber digestion and grain utilization, but the mode of action is unclear.
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TLDR
Results from this study indicate that direct application of enzymes to forages is capable of improving forage digestion.
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TLDR
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TLDR
The effects of supplying increasing ruminal doses of exogenous polysaccharide-degrading enzymes (EPDE) on rumen fermentation and nutrient digestion were studied using eight ruminally cannulated heifers and did not affect urinary excretion of allantoin and uric acid, or concentrations of glucose and urea in blood.
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TLDR
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Stability of exogenous polysaccharide-degrading enzymes in the rumen 1 Lethbridge Research Centre Co
Stability and stabilization of potential feed additive enzymes in rumen fluid*
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