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Utilization of dietary urea nitrogen is stimulated by D‐mannitol feeding in rabbits
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Description
<jats:title>ABSTRACT</jats:title><jats:p>The effect of D‐mannitol as an indigestible sugar on apparent digestibility of nutrients, nitrogen (N) utilization and growth performance, have been investigated in growing rabbits fed a urea‐containing diet. In experiment 1, 40‐day‐old male rabbits were fed a commercial diet with urea 10 g/kg with added glucose or D‐mannitol 60 g/kg each. Thereafter, in experiment 2 the rabbits aged 55 days were fed a commercial diet with or without urea 10 g/kg. Feed restriction at 55 g/kg<jats:sup>0.75</jats:sup>/day was carried out in both experiments. Addition of D‐mannitol to the urea‐containing diet decreased urinary N excretion, which consequently increased N retention and ratios of retained N to consumed N or apparently absorbed N. Addition of urea alone to the diet increased daily N intake and urinary N excretion but did not affect N retention. Weight gain and feed efficiency were improved by D‐mannitol feeding, whereas feeding with urea alone did not affect these parameters. Utilization of dietary urea was enhanced in growing rabbits fed the urea‐containing diet with D‐mannitol, resulting in improvement of N retention and growth performance.</jats:p>
Journal
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- Animal Science Journal
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Animal Science Journal 83 (8), 605-609, 2012-02-10
Wiley
