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Effects of an enzyme feed additive on extent of digestion and milk production of lactating dairy cows.
The results demonstrated the benefits of using a fibrolytic enzyme additive to enhance feed digestion and milk production by dairy cows.
Effects of particle size of alfalfa-based dairy cow diets on chewing activity, ruminal fermentation, and milk production.
Results indicate that increasing physically effective NDF content of the diets increased chewing activity and improved rumen pH status but had limited effect on milk production and milk fat content.
Effects of grain processing, forage to concentrate ratio, and forage particle size on rumen pH and digestion by dairy cows.
In this study, extent of grain processing and intake of ruminal available starch were the most influential factors affecting milk production and reducing the ratio of F:C improved total digestion and actual milk production.
A comparison of methods of adding fibrolytic enzymes to lactating cow diets.
The results indicate that fibrolytic enzymes have the potential to increase digestibility and milk production in dairy cows because digestion is low relative to potential Digestibility and when digestion is higher, as was observed in lambs or in vitro, no improvement in digestibility occurs.
Effects of grain source and enzyme additive on site and extent of nutrient digestion in dairy cows.
Results indicate that the use of hull-less barley rather than barley increased the digestible energy intake of dairy cows, resulting in higher milk production and theUse of a fibrolytic enzyme mixture enhanced feed digestibility and milk production.
Fibrolytic enzyme supplements for dairy cows in early lactation.
Investigating effects of exogenous fibrolytic enzyme supplementation on dry matter intake, milk production, and digestibility in multiparous lactating Holstein cows in early lactation found it has the potential to enhance milk yield and nutrient digestibility of cows inEarly lactation without changing feed intake.
Effects of barley grain processing on the site and extent of digestion of beef feedlot finishing diets.
Results indicate that optimal degree of rolling for barley fed to feedlot cattle corresponded to a PI of 75% or lower, and coarsely rolled barley is not recommended because it resulted in the lowest digestibility and lowest microbial protein synthesis.
Mode of action of exogenous cell wall degrading enzymes for ruminants
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.
Effects of dietary sunflower seed oil on rumen protozoa population and tissue concentration of conjugated linoleic acid in sheep
Evaluation of a nonstarch polysaccharidase feed enzyme in dairy cow diets.
- K. Beauchemin, L. Rode, M. Maekawa, D. Morgavi, R. Kampen
- Biology, MedicineJournal of dairy science
- 1 March 2000
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.