Abstract
Abstract A pot experiment was conducted to estimate the levels of iron (Fe) needed to correct Fe‐deficiency chlorosis in groundnut grown in an alkaline soil and to study Fe x nitrogen (N) interactions in soil and plant and their associated effects on growth and yield. Four levels of Fe (0, 2.5, 10, and 25 mg Fe kg‐1soil as Fe‐EDDHA) and two levels of N(0 and 100 mg N kg‐1 soil as NH4NO3) were applied factorially in a completely randomized block design. Higher rates of 10 and 25 mg Fe kg‐1 caused a significant reduction in leaf area and aerial biomass accumulation irrespective of N treatment. The Fe x N interaction was significant for all of these parameters. Specific leaf area increased at higher levels of Fe application. Higher Fe levels induced symptoms suggestive of manganese (Mn) deficiency. This diagnosis was supported by decreasing concentration of Mn in leaf blades with increasing Fe levels. By contrast concentrations of most other elements in leaf blades increased with increasing levels of Fe application, suggestive of plant growth but not uptake of other elements being reduced by Mn deficiency.
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Claims 7
Claim · model-written summary
Higher iron rates significantly reduced leaf area.
- Taxon
- groundnut
Arachis hypogaeae1 - Treatment
- 10 and 25 mg Fe kg‐1e0
- Outcome
- leaf areae0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher rates of 10 and 25 mg Fe kg‐1 caused a significant reduction in leaf area and aerial biomass accumulation irrespective of N treatment.”
e1“groundnut grown in an alkaline soil”
Claim · model-written summary
Higher iron rates significantly reduced aerial biomass accumulation.
- Taxon
- groundnutArachis hypogaeae1
- Treatment
- 10 and 25 mg Fe kg‐1e0
- Outcome
- aerial biomass accumulatione0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher rates of 10 and 25 mg Fe kg‐1 caused a significant reduction in leaf area and aerial biomass accumulation irrespective of N treatment.”
e1“groundnut grown in an alkaline soil”
Claim · model-written summary
Iron and nitrogen interacted significantly for leaf area and aerial biomass.
- Taxon
- groundnutArachis hypogaeae2
- Treatment
- Fe x Ne0
- Outcome
- leaf area and aerial biomass accumulatione1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Fe x N interaction was significant for all of these parameters.”
e1“leaf area and aerial biomass accumulation”
e2“groundnut grown in an alkaline soil”
Claim · model-written summary
Specific leaf area increased at higher iron levels.
- Taxon
- groundnutArachis hypogaeae1
- Treatment
- higher levels of Fe applicatione0
- Outcome
- Specific leaf areae0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Specific leaf area increased at higher levels of Fe application.”
e1“groundnut grown in an alkaline soil”
Claim · model-written summary
Higher iron levels induced symptoms suggestive of manganese deficiency.
- Taxon
- groundnutArachis hypogaeae1
- Treatment
- Higher Fe levelse0
- Outcome
- symptoms suggestive of manganese (Mn) deficiencye0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher Fe levels induced symptoms suggestive of manganese (Mn) deficiency.”
e1“groundnut grown in an alkaline soil”
Claim · model-written summary
Leaf blade manganese concentration declined as iron increased.
- Taxon
- groundnutArachis hypogaeae1
- Treatment
- increasing Fe levelse0
- Outcome
- concentration of Mn in leaf bladese0
- Direction
- decreasinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“decreasing concentration of Mn in leaf blades with increasing Fe levels”
e1“groundnut grown in an alkaline soil”
Claim · model-written summary
Concentrations of most other elements in leaf blades increased with iron application.
- Taxon
- groundnutArachis hypogaeae1
- Treatment
- increasing levels of Fe applicatione0
- Outcome
- concentrations of most other elements in leaf bladese0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“concentrations of most other elements in leaf blades increased with increasing levels of Fe application”
e1“groundnut grown in an alkaline soil”
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