Abstract
Abstract Although a positive response to iron (Fe) is, usually, expected in calcareous soils; this has not been always the case; and in some instances a depressing effect has been observed. An induced micronutrient imbalance is suspected. This experiment was designed to study the effect of Fe fertilizer on the plant micronutrients. Twenty three highly calcareous soils (18–46% calcium carbonate equivalent; pH 7.7–8.4; and a wide range of extractable Fe) from southern Iran were used in an eight‐week greenhouse experiment to study the effect of Fe fertilizers on soybean [Glycine max (L.) Merr.] growth and chemical composition. The statistical design was a 23 × 3 factorial arranged in a completely randomized block with three replications. Treatments consisted of 23 soils and three levels of applied Fe (0, 10, and 20 mg Fe/kg as FeEDDHA). Uniform doses of nitrogen (N), phosphorus (P), copper (Cu), manganese (Mn), and zinc (Zn) were applied to all pots. Dry matter (DM) and micronutrients concentrations and uptakes of plant tops were determined and used as the plant responses. Application of Fe either had no significant effect on DM or even decreased it. The plant concentration and uptake of Fe increased significantly in all soils. The concentrations and uptakes of Cu and Zn did not change but those of Mn decreased significantly. The negative effect of Fe application was, therefore, attributed to the interference of Fe with Mn nutrition. The mechanism involved appears to be the restriction in Mn translocation from soil to root and/or from root to the plant tops. Notes Paper No. K‐600–74 College of Agriculture, Shiraz University, Shiraz, Iran. Corresponding author.
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Claims 6
Claim · model-written summary
Fe application had no significant effect on soybean dry matter or decreased it.
- Taxon
- soybean
Glycine maxt0 - Treatment
- Application of Fee0
- Outcome
- DMe0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of Fe either had no significant effect on DM or even decreased it.”
t0“soybean”
Claim · model-written summary
Fe application significantly increased soybean Fe concentration and uptake in all soils.
- Taxon
- soybeanGlycine maxt0
- Treatment
- Fee0
- Outcome
- plant concentration and uptake of Fee0
- Direction
- increasede0
- Setting
- all soilse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The plant concentration and uptake of Fe increased significantly in all soils.”
t0“soybean”
Claim · model-written summary
Soybean Cu and Zn concentrations and uptakes did not change.
- Taxon
- soybeanGlycine maxt0
- Outcome
- concentrations and uptakes of Cu and Zne0
- Direction
- did not changee0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The concentrations and uptakes of Cu and Zn did not change but those of Mn decreased significantly.”
t0“soybean”
Claim · model-written summary
Soybean Mn concentrations and uptakes decreased significantly.
- Taxon
- soybeanGlycine maxt0
- Outcome
- those of Mne0
- Direction
- decreasede0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The concentrations and uptakes of Cu and Zn did not change but those of Mn decreased significantly.”
t0“soybean”
Claim · model-written summary
Authors attributed the negative growth effect of Fe to interference with Mn nutrition.
- Taxon
- soybeanGlycine maxt0
- Treatment
- Fe applicatione0
- Compound
- Mne0
- Outcome
- negative effecte0
- Qualifier
- interference of Fe with Mn nutritione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The negative effect of Fe application was, therefore, attributed to the interference of Fe with Mn nutrition.”
t0“soybean”
Claim · model-written summary
Authors proposed restricted Mn translocation from soil to root or root to plant tops.
- Taxon
- soybeanGlycine maxt0
- Outcome
- Mn translocatione0
- Qualifier
- restriction in Mn translocation from soil to root and/or from root to the plant topse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The mechanism involved appears to be the restriction in Mn translocation from soil to root and/or from root to the plant tops.”
t0“soybean”
The same questions in other papers
iron atom · nutrient: content · Glycine max (soybean)Positive and negative results
24 papers in the same direction as this paper · 13 in the opposite direction
- positive
- positive
- no effect
34 papers more in this group
See all 38 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.