Influence of cultures of Aspergillus oryzae on rumen and total tract digestibility of dietary components.

摘要: Three trials were conducted to evaluate the effect of dried cultures Aspergillus oryzae on nutrient utilization by mature Holstein cows fitted with ruminal and duodenal cannulas. In trial 1, four (two dry two lactating) used test (3 g/d) a control treatment at forage amounts in 4 x Latin square. Trial 2 compared control, A. oryzae, Saccharomyces cerevesiae using six lactating repeated 3 square design. For 3, switchback design compare treatment. diets contained 70 61% concentrate. A fourth vitro was conjunction which rumen fluid obtained from adapted or unadapted oryzae. On all except high increased total tract digestibility fiber fractions. Rumen VFA ammonia not affected fungal cultures. rate fermentation alfalfa but milo wheat straw. disappearance DM alfalfa, milo, straw previous adaptation required stimulate digestibility. These results indicate that primary is stimulation digestion microbes.