Ruminal parameters and dry matter fiber and nitigen detergent neutral disappearance in steers of which diet received yeast and fibrolytic enzymes
Abstract
This work has evaluated additives effect on ruminal pH and ammonia nitrogen (NH3-N) and the dry matter and neutral detergent fiber disappearance in beef cattle that received hay and 1000 g of concentrate (on dry matter basis). Four crossbred steers fitted were used, with a permanent ruminal cannula by which the ruminal liquid samples and nylon bags were collected. The bovines diet supplementation with fibrolytic enzymes and yeast have not influenced (P>0.05) the ruminal NH3-N, with values from 17.40 to 18.89 mg/dL of ruminal liquid. However, the association of enzyme and yeast reduced (P<0.05) the pH value, and the decrease ranged from 6.63 to 6.48. There was no influence (P>0.05) on the disappearance of dry matter and neutral detergent fiber, after the supplementation, and average values were 47.6% and 40.71%, respectively. Actually, there is still lack of data concerning how and where the yeast and the enzymes act.Downloads
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Published
2008-09-24
Issue
Section
Animal Nutrition
License
Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons