Reducing the Risk of Iron Toxicity by Imposing Unsaturated Conditions before Flooding
| Autor: | Saykham Vorachit, Noriharu Ae, Kazuyuki Matsuo |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
0301 basic medicine Sucrose Moisture Ecology fungi Flooding (psychology) food and beverages Soil Science 01 natural sciences Redox 03 medical and health sciences chemistry.chemical_compound 030104 developmental biology Iron toxicity Animal science chemistry Bacterial activity Agronomy and Crop Science Water content Incubation 010606 plant biology & botany |
| Zdroj: | Communications in Soil Science and Plant Analysis. 48:1078-1088 |
| ISSN: | 1532-2416 0010-3624 |
| Popis: | Unsaturated incubation (UI) of air-dried soil before flooding significantly reduced the reduction of redox potential and decreased the easily reducible iron (Fe) (ERFe). Antibacterial treatment of the soil decreased the ERFe level regardless of the moisture regime while fungicide treatment reduced the effects of UI. Treating soil under imposed UI with sucrose helped recover the ERFe to the non-UI level. The effects of UI disappeared after air-drying the soil; therefore, the decrease in ERFe—by imposing upland conditions before flooding—could be due to the decrease in the activity of iron-reducing bacteria owing to the depletion of respiratory substrates by bacterial activity during the upland conditions. These results indicate that a drastic change in soil moisture from dry to wet will increase the risk of iron toxicity by increasing the ERFe, but that maintaining an upland condition for more than one week before total submergence can reduce the risk of iron toxicity. |
| Databáze: | OpenAIRE |
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