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Investigation Of The Toxic Affect Of Manganese On Ruminal Microbial Digestion And Growth, Erin Dearing
Investigation Of The Toxic Affect Of Manganese On Ruminal Microbial Digestion And Growth, Erin Dearing
Undergraduate Honors Capstone Projects
This research investigated the toxic effect of manganese, in a reduced chemical state, on rumen microbial metabolism and growth. The reduced form of manganese is the soluble state found in subsurface waters and has a high red-ox potential. In the study, we investigated the effects of reduced manganese at varying concentrations, on rumen microbial ability to replicate and metabolize carbohydrates. The hypotheses that we tested were as follows: (1) reduced manganese decreases the rate of pH drop associated with rumen culture fermentation of a com based diet and (2) reduced manganese decreases the bacterial growth in rumen culture, as measured …
Effects Of A Proteolytic Feed Enzyme On Intake, Digestion, Ruminal Fermentation, And Milk Production, Jong-Su Eun, K. A. Beauchemin
Effects Of A Proteolytic Feed Enzyme On Intake, Digestion, Ruminal Fermentation, And Milk Production, Jong-Su Eun, K. A. Beauchemin
Animal, Dairy, and Veterinary Science Faculty Publications
The effects of exogenous proteolytic enzyme (EPE) on intake, digestibility, ruminal fermentation, and lactational performance were determined using 8 lactating Holstein cows in a double 4 ×4 Latin square experiment with a 2 ×2 factorial arrangement of treatments. Diets based on barley silage and alfalfa hay as the forage sources were formulated to maintain different forage to concentrate ratios [60:40 vs. 34:66, dry matter (DM) basis]. Four dietary treatments were tested: high forage (HF) without EPE (HF−EPE), HF with EPE (HF+EPE), low forage (LF) without EPE (LF–EPE), and LF with EPE (LF+EPE). The EPE, which contained proteolytic activity but negligible …