Author
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VAREL V H - 5438-01-07 |
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KREIKEMEIER K K - 5438-01-07 |
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Submitted to: American Society of Microbiologists Abstracts
Publication Type: Abstract Only Publication Acceptance Date: 3/10/1994 Publication Date: N/A Citation: N/A Interpretive Summary: Technical Abstract: The objective of this study was to determine if Aspergillus oryzae fermentation extract (Amaferm) produced any inhibitory responses on ruminal fermentation when fed at much higher levels than the recommended dose of 2 to 3 g daily. Using an extended Latin square design, four dietary treatments of 0, 3, 9, and 27 g Amaferm were fed daily to six cows fitted with rumen fistula. For each of four periods, bromegrass with and without Amaferm was fed for 28 d; 1 to 14 d for adaptation, 15 to 21 d for feed intake and 22 to 28 d for ruminal sampling. Dacron bags containing bromegrass cell walls were used to determine ruminal fiber degradation at 3, 6, 9, 12, 24, 48, and 72 h. There were no Amaferm effects on degradation of cell walls, cellulose or hemicellulose. Total ruminal anaerobic or cellulolytic bacteria were not different between treatments; neither were the proportion of cellulolytic species, Butyrivibrio sp., Ruminococcus albus or R. flavefaciens. Ruminal ammonia was not different; however, total VFA were higher and pH lower when 27 g daily were fed. The proportion of VFA was not different between treatments. These results indicate that Amaferm concentrations fed at nine times the recommended dosage are not inhibitory or toxic to ruminal metabolism and forage fiber degradation. |
