Synthesis of microbial protein from ammonia in the sheep's rumen and the proportion of dietary nitrogen converted into microbial nitrogen

Pilgrim, A.F.; Weller, R.A.; Gray, F.V.; Belling, C.B.

British Journal of Nutrition 24(2): 589-598

1970


ISSN/ISBN: 0007-1145
PMID: 5452709
DOI: 10.1079/bjn19700057
Accession: 014707380

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Abstract
The extent to which ammonia serves as a starting point for synthesis of microbial nitrogenous compounds was assessed when15N as (15NH4)2SO4was continuously infused into the rumen of a sheep for periods of 78 to 98 h. Steady states were reached in the composition of the rumen contents because the animal was fed with equal parts of its ration at hourly intervals. Concentrations of15N in bacterial, protozoal and rumen ammonia N were compared.