ISSN:
1432-0789
Keywords:
Ferrous iron
;
Fe2+ chelates
;
Stability constants
;
Anearobic decomposition
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Geosciences
,
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Summary The stability constants (log K) of Fe2+ chelates were determined on the basis of the shift in peak potential during the reduction of Fe2+ by a consortium of soluble ligands from incubated soils. Log K values ranged from 2.6 to 4.5. On average a change in pH of 1 unit induced a change in log K of 0.92 units. Aeration of the anaerobic decomposition products increased log K. The log K for Fe2+ chelates was about 0.8 units larger than that for Mn2+ chelates. It is considered that the chelation of ferrous iron plays an important role in the mobility and availability of iron to plants.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00264352
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