Determination of rumen microbial-nitrogen production in sheep: a comparison of urinary purine excretion with methods using 15N and purine bases as markers of microbial-nitrogen entering the duodenum

Publisher： Cambridge University Press

E-ISSN： 1475-2662|75|5|699-709

ISSN： 0007-1145

Source： British Journal of Nutrition, Vol.75, Iss.5, 1996-05, pp. : 699-709

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