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  • Title: [Effects of reduced food intake on digestive flux and use of nitrogenous matter by goats].
    Author: Halbouche M, Brun-Bellut J.
    Journal: Reprod Nutr Dev; 1995; 35(1):105-16. PubMed ID: 7873041.
    Abstract:
    Limited feeding effects (75% of ad libitum) were studied in 3 adult dry goats. Their diet was composed of dried beet pulps (1/3 DM), dried alfalfa (1/3 DM) and hay (1/3 DM). The CP content was 11.9% DM. Rumen fermented OM was decreased by 243 g.d-1, but rumen pH and ammonia content remained the same. Rumen bacteria synthesis efficiency was decreased (-4%), but the value (151 g crude bacteria protein.kg-1 DOM) was higher than conventional values used in PDI and NRC systems. Nitrogen rumen balance (duodenal N-N intake) was lower (-1.9 g.d-1) with restricted goats. This could be related to the increase in urinary urea excretion (+0.4 gN.d-1). There was no significant effect of the limiting feeding on total OM and N digestibilities. The disappearance rate of OM in the rumen and the small intestine tended to be higher (+4 and +8%, respectively) in the restricted animals. Nitrogen retention was lower (-5.7 g.d-1) in restricted goats. Only 59 (or 56%) of the duodenal nitrogen was protein. Their digestibility in the small gut was higher (+8 pts) than NPN digestibility. A total of 86% of duodenal RNA disappeared in the small gut but less than 60% of DAPA was digested in this part.
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