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

Revista Brasileira de Zootecnia

Vieira, Paulo de Figueiredo¹  Brito, Rodolfo Marques de³  Sampaio, Alexandre Amstalden Moraes² 

[1] Unesp;Unesp, Jaboticabal;UNESP

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;   

DOI  :  10.1590/S1516-35982000000200037

学科分类：兽医学

来源: Universidade Federal de Vicosa

【 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.

【 授权许可】

CC BY-NC