title: [A comparative study of the in-vitro solubility and availability of magnesium from various sources for cattle].
abstract: Magnesium (Mg) is often added to the feed of cattle to meet the dietary requirements of this element. Magnesium oxide (MgO) is usually used. However, if the supplemented MgO does not dissolve in the rumen, it will not be effective. The solubility of eight preparations of MgO was measured with three different in vitro methods. Particle size and origin varied among the eight preparations. Solubility in vitro ranged from hardly soluble (MgO-C) to highly soluble (MgO-A). In an experiment with four cows with rumen fistulas (4 x 4), the solubility of the MgO preparations in vitro was found to parallel their solubility in the rumen and their urinary excretion. It was concluded that not only the amount of MgO added to the ration is important but also the solubility of the MgO.
authors.affiliation: Vakgroep Inwendige Ziekten en Voeding der Grote Huisdieren, Faculteit Diergeneeskunde, Rijksuniversiteit Utrecht.
authors.forename: J T
authors.initials: JT
authors.lastname: Schonewille
authors.forename: A T
authors.initials: AT
authors.lastname: van't Klooster
authors.forename: M
authors.initials: M
authors.lastname: van Mosel
mesh_terms: D000821:Animal Feed; D000818:Animals; D002417:Cattle / Q000378:metabolism*; D005747:Gastric Fistula; D066298:In Vitro Techniques; D008277:Magnesium Oxide / Q000008:administration & dosage / Q000378:metabolism*; D010316:Particle Size; D012417:Rumen / Q000378:metabolism; D012995:Solubility
chemical_list: D008277:Magnesium Oxide
vernacular_title: Een vergelijkend onderzoek naar de in vitro oplosbaarheid en de beschikbaarheid van magnesium uit verschillende magnesiumbronnen voor het rund.