Interactions and interrelationships in mineral metabolism
Individual nutrients interact with each other. Depending on their composition in the solution, a competitive situation can arise: An excess of one nutrient blocks the absorption of another (antagonism). The opposite is also possible: certain nutrients promote the uptake of other elements (synergism). Conversely, this means that if certain substances are missing or are present in too low a concentration, absorption of the desired substances is not possible at all or only incompletely.
The Table provides an overview of the most frequent Interrelationships.
| Cause | Action | |
|
impedes absorption (antagonism) |
promotes absorption (synergism) |
|
| NH4 (Ammonium) | Ca, Mg, K | P, SO4 |
| NO3 (Nitrat) | P | Ca, Mg, Mn, K |
| Ca (Calcium) | Mg, Fe, B, Mn | |
| K (Kalium) | Ca, Mg, NH4 (Ammonium) | NO3 (Nitrat) |
| Mg (Magnesium) | Ca | P |
| Mn (Mangan) | Mg, Fe, Zn, NH4 (Ammonium), B | NO3 (Nitrat) |
| Cl (Chlor) | P, NO3 (Nitrat) | Ca |
| Na (Natrium) | Ca | P |
| P (Phosphor) | Fe (Ca, B, Cu) | Zn |
| Cu (Kupfer) | Fe, B | |
| SO4 (Sulfat) | Mo | Ca |
| Zn (Zink) | P | |
| Optimal supply of: | ||
| B (Bor) | K, Ca, P | |
| Ca (Calzium) | K (Viets-Effekt 1) | |
| Lack off: | ||
| B (Bor) | K, Mg, P = Carbohydrate stagnation | |
| Ca (Calcium) | K | |
| Überschuss an: | ||
| Ammoniak | Calcium | |
| Kalium | Calcium | |
| Magnesium | Calcium | |
| Natrium | Calcium (2) | |
1) Viets effect
On the function of calcium (Ca) in the cell wall: homogalacturonan of the pectins are bound together via Ca (= junction zones); suppresses the uptake of unwanted cations (Na+; Cd2+; Mn2+); prevents the leakage of sugars, amino acids and K+; promotes internal uptake, especially at acidic pH (Viets effect);
2) EC value
Too high a sodium value (manifested in a high EC value) can make calcium uptake more difficult or even block it completely.
Context:
ID: 58