Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 421586
Title The biodegradability of EDDHA chelates under calcareous soil conditions
Author(s) Schenkeveld, W.D.C.; Hoffland, E.; Reichwein, A.M.; Temminghoff, E.J.M.; Riemsdijk, W.H. van
Source Geoderma 173-174 (2012). - ISSN 0016-7061 - p. 282 - 288.
Department(s) Chair Soil Chemistry and Chemical Soil Quality
Chair Soil Biology and Biological Soil Quality
Publication type Refereed Article in a scientific journal
Publication year 2012
Keyword(s) enhanced phytoremediation - organic-carbon - iron chlorosis - heavy-metals - plants - phytoextraction - temperature - components - fertilizer - behavior
Abstract FeEDDHA (iron (3 +) ethylenediamine-N,N'-bis(hydroxy phenyl acetic acid) products are commonly applied to mend or prevent Fe chlorosis in plants. In soil application, racemic and meso o,o-FeEDDHA are the effective components, while o,p-FeEDDHA tends to adsorb or react to o,p-CuEDDHA. Upon interaction with soil, a plant-independent, gradual decline in soil solution concentration of meso o,o-FeEDDHA and o,p-CuEDDHA has been observed. The aim of this study was to examine to what extent biodegradation contributes to this gradual decline. A 4-week incubation experiment was done with calcareous soil to which FeEDDHA was added. The experiment involved three sterility regimes, two conditioning regimes and three time steps. Soil solution concentrations of meso o,o-FeEDDHA and o,p-CuEDDHA gradually declined in all sterility regimes. Biodegradation did not significantly contribute to the decline in concentration of any EDDHA chelate, except for CoEDDHA, which was formed in small quantities as a result of cation displacement. The rate of the process causing the decline in meso o,o-FeEDDHA and o,p-CuEDDHA concentration was higher at higher temperature and in soil not exposed to gamma irradiation. This study offers no evidence that the effectiveness of soil-applied FeEDDHA fertilizers is compromised by biodegradation
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