[Influence of potassium on Mg- and Ca-metabolism in cows: effects and side effects of scientific research].
Results of scientific studies are obtained by analysing of the present knowledge of a current problem and a corresponding new experimental set-up. Under ideal conditions the data of the new study agree with the deduced working hypothesis. This general consideration is true for the well established correlation between K content and growth rates of plants. At low K concentrations (up to 3% of dry matter) K causes a linear increase of growth and finally a saturation. This positive effect of K on growth rates of plants is accompanied by some side effects. There is no doubt that a high intake of K is involved in the pathogenesis of grass tetany and of milk fever. The present publication gives some information about this correlation and discusses the discrepancy between the intention of a scientific study and possible "side effects", which cannot be predicted in many cases.
Martens
H
H
Institut für Veterinär-Physiologie, Freie Universität Berlin. martens@vetmed.fu-berlin.de
Schweigel
M
M
D000821:Animal Feed; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D002118:Calcium / Q000009:adverse effects / Q000378:metabolism*; D002417:Cattle / Q000254:growth & development / Q000378:metabolism*; D002418:Cattle Diseases / Q000209:etiology; D008274:Magnesium / Q000009:adverse effects / Q000378:metabolism*; D011188:Potassium / Q000008:administration & dosage / Q000009:adverse effects / Q000494:pharmacology*; D012106:Research
D008274:Magnesium; D011188:Potassium; D002118:Calcium