Alterations of In Vitro Rumen Fermentation Patterns With Various Levels of Sucrose and Cellulose

Three fermentation trials were conducted using cellulose, ground corn, and sucrose as substrates.These substrates were added to a mixture of equal parts of strained tureen fluid and synthetic saliva solution in tubes with rubber stoppers containing one-way relief valves.The samples were incubated in a circulating water bath at 39 C. A factorial arrangement was used to study the effects of 0, 3, 6, 9, and 12% sucrose levels, 30 and 70% cellulose levels, and incubation periods of 0, 2, 4, and 6 hr on pH, lactate concentration, and volatile fatty acid proportions of the medium.Increasing the level of sucrose produced linear elevations in butyrate and lactate, whereas pH and acetate declined linearly.Valerate increased to the 9% sucrose level, but propionate and isovalerate were not significantly affected.In comparison to Effect of Bidrin on the Metabolism of Dietary Components by the Bovine 1,2 AbstractSix steers averaging 400 kg in weight were used in a switchback trial to study