University of Khartoum

The Absorptive Capacity of Sheep Omasum is Modulated by the Diet

The Absorptive Capacity of Sheep Omasum is Modulated by the Diet

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Title: The Absorptive Capacity of Sheep Omasum is Modulated by the Diet
Author: المعتمد, اسامه
Abstract: The omasum is an important site of water and electrolyte absorption in the proximal part of the digestive tract1,2,3,4. Feeding regimes influence mineral and electrolyte transport across the rumen epithelium. All transport mechanisms of electrolytes - so far studied - are Significantly higher in epithelia from concentrate fed sheep. Corresponding studies with tissues from the omasum are not known despite its important absorptive capacity. The aim of the present study has therefore been to examine the effect of diet on transport of Na", SCFA and of HC03- across the isolated omasal epithelium of hay-fed and concentrate-fed sheep. Animals and diet: Sheep with a body weight of30 - 50 kg were fed two different dietary regimens: (a) hay ad libitum or (b) 800 g concentrate diet in equal portions at 7:00 a.m. and 3:00 p.m., plus hay ad libitum. The animals were fed on these diets at least three weeks before being slaughtered. Water and lick-stones were available ad libitum. Isolation of epithelia and in vitro incubation. Na transport: The omasal epithelium of hay-fed animals exhibits an net transport ofNa in mucosalserosal direction.
URI: http://hdl.handle.net/123456789/6415
Date: 2015-03-05


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