Claim · model-written summary
After reflooding, intermittently flooded soil solution Si reached levels similar to continuous flooding before Fe was reduced again.
- Treatment
- intermittent flooding treatmente0
- Outcome
- Si concentrations in soil solutionse0
- Direction
- increasede0
- Qualifier
- after re-flooding before Fe was re-reducede0
- Comparator
- continuous flooding treatmente0
Not reportedTaxonMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSettingValue
Verbatim
e0“the Si concentrations in soil solutions in the intermittent flooding treatment increased to the levels similar to those in the continuous flooding treatment after re-flooding before Fe was re-reduced”
Title
Relationship between plant-available silicon and reducible iron in irrigated paddy soils
Chikako Mihara; Xhui Chang; Yuki Sugiura; et al. Soil Science & Plant Nutrition 2017. doi:10.1080/00380768.2016.1278560
Other claims from this paper (9)
- Association Available soil Si was positively correlated with Si content in rice shoots.
- Association Soil Feo content was positively correlated with Si content in rice shoots.
- Association Available Si, Sio, and Feo in soil did not show a similar correlation.
- Mechanism The authors inferred that Sio adsorbed to Feo is unnecessary for determining plant-available Si pool size.
- Intervention effect Intermittent drainage lowered soil solution Fe concentration by 83–96% versus continuous flooding.
- Mechanism Oxidation of Fe2+ led to coprecipitation of Si with Fe.
- Intervention effect Drainage decreased soil solution Si by 22% or less.
- Observation Si declines after drainage were smaller than 24–97% declines in mixed oxic solutions.
- Mechanism The authors concluded that reducible Fe has little effect on dissolved Si and is not a major determinant of rice-available Si.