Abstract
Drip-irrigated rice (Oryza sativa L.) is susceptible to iron (Fe) deficiency. The major possible cause of Fe deficiency is the changes in the water regime, which mainly affects the redox potential (Eh) of the soil dictating the solubility of Fe. However, how high soil Eh affects soil available Fe and rice Fe uptake is unclear. In this paper, we investigated the effect of soil Eh on rice Fe uptake under different water management strategies (drip irrigation (DI), flood irrigation (FI) and forced aeration of soil in flooding irrigation (FIO)). The results showed that the diethylenetriaminepentaacetic acid (DTPA)-extractable Fe and Fe(II) concentration in the soil, Fe concentration and chlorophyll contents of leaves and biomass of rice in FIO were greater than those in DI but significantly less than those in FI. The Fe uptake of the plant in DI was the lowest, but which in FI was the highest. Overall, FIO resulted in a significant reduction in Fe uptake of rice, but greater than that in DI. We concluded that both the decreased soil water content and the increased soil Eh were important factors that caused Fe deficiency of drip-irrigated rice.
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Claims 7
Claim · model-written summary
Soil extractable Fe and Fe(II) in FIO exceeded DI but were significantly below FI.
- Taxon
- rice
Oryza sativat0 - Treatment
- FIOe0
- Outcome
- DTPA)-extractable Fe and Fe(II) concentration in the soile0
- Direction
- greatere0
- Qualifier
- significantly less than those in FIe0
- Comparator
- DIe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that the diethylenetriaminepentaacetic acid (DTPA)-extractable Fe and Fe(II) concentration in the soil, Fe concentration and chlorophyll contents of leaves and biomass of rice in FIO were greater than those in DI but significantly less than those in FI.”
t0“rice”
Claim · model-written summary
Rice leaf Fe concentration under FIO exceeded DI but was significantly below FI.
- Taxon
- riceOryza sativae0
- Organ / stage
- leavese0
- Treatment
- FIOe0
- Outcome
- Fe concentratione0
- Direction
- greatere0
- Qualifier
- significantly less than those in FIe0
- Comparator
- DIe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fe concentration and chlorophyll contents of leaves and biomass of rice in FIO were greater than those in DI but significantly less than those in FI.”
Claim · model-written summary
Rice leaf chlorophyll under FIO exceeded DI but was significantly below FI.
- Taxon
- riceOryza sativae0
- Organ / stage
- leavese0
- Treatment
- FIOe0
- Outcome
- chlorophyll contentse0
- Direction
- greatere0
- Qualifier
- significantly less than those in FIe0
- Comparator
- DIe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“chlorophyll contents of leaves and biomass of rice in FIO were greater than those in DI but significantly less than those in FI.”
Claim · model-written summary
Rice biomass under FIO exceeded DI but was significantly below FI.
- Taxon
- riceOryza sativae0
- Treatment
- FIOe0
- Outcome
- biomasse0
- Direction
- greatere0
- Qualifier
- significantly less than those in FIe0
- Comparator
- DIe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“biomass of rice in FIO were greater than those in DI but significantly less than those in FI.”
Claim · model-written summary
Rice Fe uptake was lowest under DI and highest under FI.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Fe uptake of the plant in DI was the lowest, but which in FI was the highest.”
t0“rice”
Claim · model-written summary
FIO significantly reduced rice Fe uptake relative to FI, while uptake remained greater than in DI.
- Taxon
- riceOryza sativae0
- Treatment
- FIOe0
- Outcome
- Fe uptakee0
- Direction
- greatere0
- Qualifier
- significant reductione0
- Comparator
- DIe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Overall, FIO resulted in a significant reduction in Fe uptake of rice, but greater than that in DI.”
Claim · model-written summary
The authors attributed iron deficiency in drip-irrigated rice to lower soil water content and higher soil Eh.
- Taxon
- riceOryza sativae0
- Treatment
- drip-irrigatede0
- Outcome
- Fe deficiencye0
- Qualifier
- decreased soil water content and the increased soil Ehe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We concluded that both the decreased soil water content and the increased soil Eh were important factors that caused Fe deficiency of drip-irrigated rice.”
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