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Digestion and absorption of starch, maltose and lactose by the preruminant calf

Published online by Cambridge University Press:  07 January 2011

N. B. Coombe  and
R. H. Smith
N. B. Coombe
Affiliation:
National Institute for Research in Dairying, Shinfield, Reading RG2 9AT
R. H. Smith
Affiliation:
National Institute for Research in Dairying, Shinfield, Reading RG2 9AT
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Abstract

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1. Preruminant calves, some of which were equipped with re-entrant cannulas in the small intestine, were given liquid feeds in which various starches, maltose or lactose formed the sole source of carbohydrate.

2. The sugars left the abomasum at the same rate as a water-soluble marker but the starches were greatly delayed. Little starch left the abomasum until about 5 h after feeding. Examination of abomasal contents 0.5 h after feeding showed the starch to be associated with the casein clot.

3. Amounts of starch, maltose and lactose removed during the passage of digesta through the small intestine were about 60, 43 and 97% of intake respectively, with no marked difference with age between about 7 and 16 weeks.

4. No change in blood glucose was apparent in calves given starch-containing feeds. The possible effect of the retention of dietary starch in the abomasum in minimizing blood glucose responses is discussed.

Type
General Nutrition
Information
British Journal of Nutrition , Volume 31 , Issue 2 , March 1974 , pp. 227 - 235
Copyright
Copyright © The Nutrition Society 1974

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