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| Content Provider | Springer Nature Link |
|---|---|
| Author | Santiago, Ana Delgado, Antonio |
| Copyright Year | 2007 |
| Abstract | Poorly crystalline Fe oxides and organic matter are two important factors affecting Fe nutrition of plants. The main objective of this work was to study the contribution of humic substances to Fe nutrition of a typical Fe-chlorosis sensitive plant (white lupin, Lupinus albus L.). An experiment was performed involving two growing media (siliceous and calcareous) and different Fe sources: control without additional Fe added to the growing media, ferrihydrite (FH), FH + humic substances (HS, at two rates, 0.1 and 0.3 g C kg−1 growing media), Fe complexed to humic substances (Fe–HS), and Fe–EDDHA (as an effective Fe source in calcareous media). Chlorophyll meter readings and dry matter production (DM) were significantly greater with Fe–EDDHA and Fe–HS when compared with the other treatments in calcareous media. The positive effect of complexed Fe (to EDDHA or HS) on Fe nutrition can be, at least partially, related to an increase in Fe(III)-reducing capacity by roots, which seems to be improved by an enhanced root development. No positive effect on Fe nutrition was observed with the application of HS in a ferrihydrite enriched growing media (FH + HS) at 4 weeks, particularly with the application of HS at 0.3 g C kg−1 in calcareous media. Thus, the effect of HS on Fe availability was only positive if some Fe is complexed to HS. The efficiency of HS with Fe complexed (Fe–HS) in preventing Fe chlorosis was found to be similar to Fe–EDDHA. This is important not only for the knowledge of factors affecting Fe availability in soils, but also with a view of using Fe–HS complexes as effective products to correct this nutritional problem. |
| Starting Page | 829 |
| Ending Page | 836 |
| Page Count | 8 |
| File Format | |
| ISSN | 01782762 |
| Journal | Biology and Fertility of Soils |
| Volume Number | 43 |
| Issue Number | 6 |
| e-ISSN | 14320789 |
| Language | English |
| Publisher | Springer-Verlag |
| Publisher Date | 2007-04-19 |
| Publisher Place | Berlin, Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Fe-availability Fe-chlorosis Ferrihydrite Organometallic compounds Soil Science & Conservation Agriculture |
| Content Type | Text |
| Resource Type | Article |
| Subject | Agronomy and Crop Science Soil Science Microbiology |
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