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| Titel: |
Effect of pH on the behaviour of various iron chelates in sphagnum (moss) peat |
| Auteur: |
Boxma, R. |
| Verschenen in: |
Communications in soil science and plant analysis |
| Paginering: | Jaargang 12 (1981) nr. 8 pagina's 755-763 |
| Jaar: |
1981 |
| Inhoud: |
An incubation experiment was conducted to examine the stability and water solubility of four different iron chelates in slightly decomposed sphagnum peat as affected by pH and time of incubation. Decrease in soluble iron upon addition of iron chelates is caused by fixation and by replacement of the chelated iron by calcium at high pH. At low pH (pH-H2O 4.35), recovery of soluble iron after six weeks decreases in the order:Fe-DTPA > Fe-EDTA > Fe-EDDHA > Fe-HEEDTA. At high pH (pH - H2O 7.25 and 7.85) this order is: Fe-EDDHA >>Fe-DTPA > Fe-HEEDTA > Fe-EDTA. In cultivating plants at low pH, Fe-EDTA and Fe-DTPA will be the more efficient iron sources. At high pH, however, only Fe-EDDHA supplies sufficient soluble iron for a long period. Fe-HEEDTA is a poor iron source at all pH-levels because of fixation and, at high pH, substitution of calcium for iron. It was demonstrated that it is necessary to characterize commercial iron chelates by gel chromatography before testing them in plant performance studies. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 4 van 8 gevonden artikelen
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