Abstract
Response to iron supply was observed for crops growing in newly reclaimed sandy and calcareous soils of Egypt. Fe-EDDHA was more effective as a soil application or foliar spray than FeSO4 in correcting iron deficiency in these soils characterized by alkaline pH and high CaCO3 content. Due to costs and irregular supply of the synthetic chelates in the market, crop production was affected. The addition of organic residues to these soils was found to reduce the incidence of iron deficiency in crops. Attempts were made to study the nature and role of humic substances formed under arid conditions with respect to the availability and uptake of iron by plants. The aim of this work is to present various studies dealing with humic and fulvic acids in relation to their chemical properties and the nature of complexes formed with Fe as a function of organic residue source and their role in solubilizing Fe and other nutrients from soils. A comparative study regarding the effect of synthetic versus natural chelates on Fe uptake by plants from soil or from nutrient solution having increasing concentrations of Fe will be presented.
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Elgala, A.M. (1999). Interaction of Iron and Organic Matter in Relation to its Uptake by Plants. In: Berthelin, J., Huang, P.M., Bollag, JM., Andreux, F. (eds) Effect of Mineral-Organic-Microorganism Interactions on Soil and Freshwater Environments. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-4683-2_7
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DOI: https://doi.org/10.1007/978-1-4615-4683-2_7
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