site of net absorption of Ca from the intestinal tract of growing pigs and effect of phytic acid, Ca level and Ca source on Ca digestibility

An experiment was conducted to test the hypothesis that the standardised digestibility of Ca in calcium carbonate and Lithothamnium calcareum Ca is not different regardless of the level of dietary Ca, and that phytic acid affects the digestibility of Ca in these two ingredients to the same degree. T...

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Bibliographic Details
Published in:Archives of animal nutrition 2014, Vol.68 (2), p.126-142
Main Authors: González-Vega, J. Caroline, Walk, Carrie L, Liu, Yanhong, Stein, Hans H
Format: Article
Language:English
Subjects:
Absorption
Animal Feed - analysis
Animal Nutritional Physiological Phenomena
Animals
body weight
calcium
calcium absorption
calcium carbonate
Calcium Carbonate - administration & dosage
Calcium Carbonate - metabolism
Calcium, Dietary - administration & dosage
Calcium, Dietary - metabolism
cannulas
diet
Diet - veterinary
Dietary Supplements - analysis
digestibility
Digestion
Dose-Response Relationship, Drug
duodenum
endogenous fluxes
endogenous losses
ileum
ingredients
Intestine, Large - metabolism
Intestine, Small - metabolism
jejunum
large intestine
Lithothamnium
phytic acid
Phytic Acid - metabolism
pigs
Random Allocation
Rhodophyta - chemistry
stomach
Stomach - metabolism
Sus scrofa - physiology
swine
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Summary:An experiment was conducted to test the hypothesis that the standardised digestibility of Ca in calcium carbonate and Lithothamnium calcareum Ca is not different regardless of the level of dietary Ca, and that phytic acid affects the digestibility of Ca in these two ingredients to the same degree. The objectives were to determine where in the intestinal tract Ca absorption takes place and if there are measurable quantities of basal endogenous Ca fluxes in the stomach, small intestine or large intestine. Diets contained calcium carbonate or L. calcareum Ca as the sole source of Ca, 0% or 1% phytic acid and 0.4% or 0.8% Ca. A Ca-free diet was also formulated and used to measure endogenous fluxes and losses of Ca. Nine growing pigs (initial body weight 23.8 ± 1.3 kg) were cannulated in the duodenum and in the distal ileum, and faecal, ileal and duodenal samples were collected. Duodenal endogenous fluxes of Ca were greater (p
ISSN:1477-2817
1745-039X
1477-2817
DOI:10.1080/1745039X.2014.892249