Abstract
Iron (Fe) and manganese (Mn) are essential nutrients for plants. Application of high levels of either Fe or Mn is often accompanied by relatively low levels of uptake for the other nutrient. The antagonistic relationship of these nutrient elements may occur either during absorption by roots or during translocation from roots to shoot. A greenhouse study was carried out to study the effect of soil and foliar applications of Fe and Mn on yield and Fe-Mn status of soybean plant. Results showed that soil or foliar application of Fe or Mn did not influence soybean root or shoot dry matter yield (SDMY). Both soil and foliar applications of Fe significantly increased shoot Fe concentration and uptake; however, foliar application was more effective. Foliar spray of 1 % Fe sulfate improved plant Fe content and had no effect on SDMY or on shoot Mn concentration. Soil addition of Fe decreased root Mn concentration/uptake probably due to the well-known antagonistic effect of Fe on Mn absorption; whereas, foliar Fe application had no negative effect on shoot Mn status . Shoot Mn uptake was more negatively affected by soil Fe application than root Mn uptakes. Hence, reduction of root Mn absorption and translocation to shoot were the main reasons for suppressing effect of Fe on Mn nutrition. Also, high level of soil applied Mn (i.e., 30 mg Mn kg -1 ) decreased Fe translocation from root to shoot. In conclusion, foliar Fe/ Mn applications are appropriate methods of applying these nutients for preventing yield reduction and nutrient imbalance in soybean grown on such calcareous soils.
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Claims 11
Claim · model-written summary
Soil or foliar Fe or Mn did not change soybean root or shoot dry matter yield.
- Taxon
- soybean
Glycine maxt0 - Treatment
- soil or foliar application of Fe or Mne0
- Outcome
- root or shoot dry matter yielde0
- Direction
- did not influencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean”
e0“soil or foliar application of Fe or Mn did not influence soybean root or shoot dry matter yield (SDMY)”
Claim · model-written summary
Soil and foliar Fe significantly increased shoot Fe concentration.
- Taxon
- soybeanGlycine maxt0
- Treatment
- soil and foliar applications of Fee0
- Outcome
- concentratione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean”
e0“Both soil and foliar applications of Fe significantly increased shoot Fe concentration and uptake”
Claim · model-written summary
Soil and foliar Fe significantly increased shoot Fe uptake.
- Taxon
- soybeanGlycine maxt0
- Treatment
- soil and foliar applications of Fee0
- Outcome
- uptakee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean”
e0“Both soil and foliar applications of Fe significantly increased shoot Fe concentration and uptake”
Claim · model-written summary
Foliar Fe application was more effective than soil application for shoot Fe status.
- Taxon
- soybeanGlycine maxt0
- Treatment
- foliar applicatione0
- Outcome
- shoot Fe concentration and uptakee0
- Direction
- more effectivee0
- Comparator
- soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean”
e0“Both soil and foliar applications of Fe significantly increased shoot Fe concentration and uptake; however, foliar application was more effective”
Claim · model-written summary
A 1 % Fe sulfate foliar spray improved plant Fe content.
- Taxon
- soybeanGlycine maxt0
- Treatment
- Foliar spray of 1 % Fe sulfatee0
- Outcome
- plant Fe contente0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean”
e0“Foliar spray of 1 % Fe sulfate improved plant Fe content”
Claim · model-written summary
A 1 % Fe sulfate foliar spray did not affect dry matter yield or shoot Mn concentration.
- Taxon
- soybeanGlycine maxt0
- Treatment
- Foliar spray of 1 % Fe sulfatee0
- Outcome
- SDMY or on shoot Mn concentratione0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean”
e0“Foliar spray of 1 % Fe sulfate improved plant Fe content and had no effect on SDMY or on shoot Mn concentration”
Claim · model-written summary
Soil Fe addition decreased root Mn concentration and uptake.
- Taxon
- soybeanGlycine maxt0
- Treatment
- Soil addition of Fee0
- Outcome
- root Mn concentration/uptakee0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean”
e0“Soil addition of Fe decreased root Mn concentration/uptake”
Claim · model-written summary
Foliar Fe had no negative effect on shoot Mn status.
- Taxon
- soybeanGlycine maxt0
- Treatment
- foliar Fe applicatione0
- Outcome
- shoot Mn statuse0
- Direction
- no negative effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean”
e0“foliar Fe application had no negative effect on shoot Mn status”
Claim · model-written summary
Soil Fe suppressed shoot Mn uptake more than root Mn uptake.
- Taxon
- soybeanGlycine maxt0
- Treatment
- soil Fe applicatione0
- Outcome
- Shoot Mn uptakee0
- Direction
- more negatively affectede0
- Comparator
- root Mn uptakese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean”
e0“Shoot Mn uptake was more negatively affected by soil Fe application than root Mn uptakes”
Claim · model-written summary
High soil Mn decreased Fe translocation from roots to shoots.
- Taxon
- soybeanGlycine maxt0
- Treatment
- soil applied Mn (i.e., 30 mg Mn kg -1 )e0
- Outcome
- Fe translocation from root to shoote0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean”
e0“high level of soil applied Mn (i.e., 30 mg Mn kg -1 ) decreased Fe translocation from root to shoot”
Claim · model-written summary
Foliar Fe and Mn applications were recommended to prevent yield loss and nutrient imbalance on calcareous soil.
- Taxon
- soybeanGlycine maxt0
- Outcome
- foliar Fe/ Mn applications are appropriate methods of applying these nutients for preventing yield reduction and nutrient imbalancee0
- Setting
- calcareous soilse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean”
e0“foliar Fe/ Mn applications are appropriate methods of applying these nutients for preventing yield reduction and nutrient imbalance in soybean grown on such calcareous soils”
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See all 50 papers →8 of 10 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.
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.