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Changes of redox and pH conditions in a flooded soil amended with glucose and manganese oxide or iron oxide under laboratory conditions
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Titel: |
Changes of redox and pH conditions in a flooded soil amended with glucose and manganese oxide or iron oxide under laboratory conditions |
In: | Zeitschrift für Pflanzenernährung und Bodenkunde, 159, 1996, 3, S. 297-304 |
veröffentlicht: |
Wiley
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Umfang: | 297-304 |
ISSN: |
0044-3263 |
DOI: | 10.1002/jpln.1996.3581590311 |
Zusammenfassung: | <jats:title>Abstract</jats:title><jats:p>The changes of Eh and pH in soil suspension (Ah‐horizon of a Mollic Gleysol) and Mn<jats:sup>2+</jats:sup> or Fe<jats:sup>2+</jats:sup> concentrations in the equilibrium soil solution at different levels of glucose (0%, 0.5% and 1%) and MnO<jats:sub>2</jats:sub> (0%, 0.025%, 0.05% and 0.1%) or Fe<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub> (0%, 0.025%, 0.05% and 0.1%) were examined. It was found that the degree of Mn‐ and Fe‐reduction in soil depends mainly on the presence and the amount of an easily decomposable carbon source and to a minor degree on the content of native or added forms of MnO<jats:sub>O</jats:sub>2 or Fe<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub> in the soil.</jats:p><jats:p>Theoretical relationships between the water soluble manganese and iron and the Eh and pH values have been verified, when the observed initial drop of Eh was eliminated. It was found that the water soluble manganese content was described best by the Mn<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub>/Mn<jats:sup>2+</jats:sup> redox system, and that of iron by the Fe<jats:sub>3</jats:sub> (OH)<jats:sub>3</jats:sub>/Fe<jats:sup>2+</jats:sup> system.</jats:p> |
Format: | E-Article |
Quelle: | Wiley (CrossRef) |
Sprache: | Englisch |