Ammonia production from in vitro fermentation of diets with dry yeast, urea or cottonseed meal

[摘要] - The objective of this trial was to evaluate the in vitro ammonia (N-NH3) production in fermentation of diets with different protein sources (dry yeast, urea and cottonseed meal) used for ruminants diets. The data relative to the N-NH3 production measured in the first hour of incubation, showed differences between diets with cottonseed meal and dry yeast, compared with diets with urea, with values of 7.52; 8.66; and 29.84 mg N-NH3/100 mL of ruminal fluid, respectively. The same pattern was observed until 12 hours of fermentation, with values of 1.05; 1.57; and 8.57 mg N-NH3/100 mL. The analysis of data related to the 12 hourly sample of fermentation showed the trend of decreasing N-NH3/100 mL concentration of ruminal fluid, reaching the lower values on 12 hours of fermentation.

[学科分类] 兽医学

[关键词] ammonia;cottonseed meal;dry yeast;protein sources;ruminal fermentation;urea     IntroduçãoO ruminante é dotado de sistema digestivo peculiar que permite a digestão de alimentos fibrosos;transformando-os em princípios nutritivos úteis;a partir do mutualismo existente entre o animal e a microbiota ruminal