SVIBOR - Project code: 3-03-291

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Project code: 3-03-291


ABSORPTION OF MINERALS IN THE DIGESTIVE TRACT OF DOMESTIC ANIMALS


Main researcher: MITIN, VLADIMIR (32053)



Assistants
Type of research: basic
Duration from: 01/01/91. to 12/31/94.

Papers on project (total): 22
Institution name: Veterinarski fakultet, Zagreb (53)
Department/Institute: Department of Physiology and Radiobiology
Address: Heinzelova 55
City: 10000 - Zagreb, Croatia
Communication
Phone: 385 (0)1 2390 172, ili 2390 111
Fax: 385 (0)1 214 697

Summary: The experiments are provided on bags made from the surviving mucous membrane of different compartments of the bovine stomach, swine caecum and colon epithelia, and from the chicken caeca. The mineral interactions during absorption are investigated. Sodium generally stimulates phosphate absorption from the epithelia mentioned above. Even presence of ferrous ions did not diminish this stimulatory effect. Low sodium concentrations in the content stimulates and high concentrations of sodium in the content inchibites calcium absorption from the chicken caeca. Low ammonia concentration in the content of swine colon did not influence phosphate absorption, medium ones stimuleted it, and high concentrations inchibited this absorption. Inorganic as well as chelated ferro iron may be absorbed from the caecum epithelium, inorganic ferro iron by the saturable process, and chelated ferro iron depending of chelate concentration in the content. Ferro iron stimulate calcium absorption in the abomasum. Magnesium may be absorbed from the swine caecal epithelium depending of its concentration in the content. Presence of ammonia in the content depressed the magnesium absorption from this organ.

Keywords: absorption, phosphate, iron, calcium, magnesium, effect of sodium, effect of ammonia, rumen, omasum, abomasum, cattle, swine's caecum, swine's colon, chicken's caeca.

Research goals: According to our experience during last 25 years about the mineral absorption from the digestive tract of domestic animals, as well as many data from the literature, the interactions between the absorption of different minerals essential for the living, exsists and as a result of these interactions stimulation or inchibition of their absorption may be achieved. An exsistance of these relations which was shown in our previous investigations, especially those carried on different compartments of the bovine stomach was the basis of our intention to investigate the absorption of different minerals from other parts of the digestive tract of domestic animals especially from the caeca and colon of omnivor mammals and birds. The knowledge about the antagonistic and synergistic effects of the particular mineral during absorption from the digestive tract is extremely important for the preparing of proper composition of animal feed especially during the modern farming technology. An ignorance or poor knowledge about these interactions may be due to a poore success of animal production, and the course of many pathological problems during the animal breeding processes as a result of poore or imposible absorption of particular mineral from the digestive tract.

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Last update: 02/25/94
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