Abstract
Abstract Corn ( Zea mays L.) and pinto beans ( Phaseolus vulgaris ) were used as test crops to study the interactions between P, Fe, and Zn in a calcareous solution culture. The addition of Zn to the intermediate Fe level accentuated Fe deficiency symptoms and depressed the yield of corn. This adverse effect on yield was not related to the Fe concentration in the plant but was associated with a decreased Fe/Zn ratio. In this study the antagonistic effect of Zn on Fe was manifested by reduced yields as the ratio of Fe/Zn in the tissue decreased below 1.5. Addition of Fe corrected this adverse effect on yield. By increasing the P at the intermediate Fe level the yield first increased; then P‐induced Fe deficiency symptoms appeared, accompanied by a depression in yield. This phenomenon was not associated with change in Fe concentration but was related to high P concentration in the plant tissue, which resulted in a P/Fe ratio > 60. The addition of Fe did not change the Fe concentration but corrected the depression in yield. A P/Zn concentration ratio > 300 resulted in a slight depression in yield in the presence of an adequate supply of Fe. The depression in yield associated with the antagonistic effect of Zn on Fe and P on Fe and Zn, although manifested on corn, was not found with pinto bean at the concentration levels studied.
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Claims 9
Claim · model-written summary
Adding Zn to the intermediate Fe level accentuated Fe deficiency and depressed corn yield.
- Taxon
- Corn
Zea mays subsp. mayse0 - Treatment
- addition of Zne1
- Outcome
- yield of corne1
- Direction
- depressede1
- Comparator
- intermediate Fe levele1
- Setting
- calcareous solution culturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn ( Zea mays L.) and pinto beans ( Phaseolus vulgaris ) were used as test crops to study the interactions between P, Fe, and Zn in a calcareous solution culture”
e1“The addition of Zn to the intermediate Fe level accentuated Fe deficiency symptoms and depressed the yield of corn”
Claim · model-written summary
Yield of corn was reduced when the tissue Fe/Zn ratio fell below 1.5.
- Taxon
- cornZea mays subsp. mayse0
- Compound
- Fe/Zne2
- Outcome
- yieldse2
- Direction
- reducede2
- Qualifier
- decreased below 1.5e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn ( Zea mays L.) and pinto beans ( Phaseolus vulgaris ) were used as test crops to study the interactions between P, Fe, and Zn in a calcareous solution culture”
e2“In this study the antagonistic effect of Zn on Fe was manifested by reduced yields as the ratio of Fe/Zn in the tissue decreased below 1.5”
Claim · model-written summary
The adverse effect on corn yield was not related to Fe concentration in the plant but was associated with a decreased Fe/Zn ratio.
- Taxon
- cornZea mays subsp. mayse0
- Outcome
- Fe/Zn ratioe3
- Direction
- decreasede3
- Qualifier
- not related to the Fe concentration in the plante3
- Comparator
- Fe concentration in the plante3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn ( Zea mays L.) and pinto beans ( Phaseolus vulgaris ) were used as test crops to study the interactions between P, Fe, and Zn in a calcareous solution culture”
e3“This adverse effect on yield was not related to the Fe concentration in the plant but was associated with a decreased Fe/Zn ratio”
Claim · model-written summary
Adding Fe corrected the adverse effect of Zn on corn yield.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- Addition of Fee4
- Outcome
- adverse effect on yielde4
- Direction
- correctede4
- Comparator
- intermediate Fe levele1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn ( Zea mays L.) and pinto beans ( Phaseolus vulgaris ) were used as test crops to study the interactions between P, Fe, and Zn in a calcareous solution culture”
e4“Addition of Fe corrected this adverse effect on yield”
e1“The addition of Zn to the intermediate Fe level accentuated Fe deficiency symptoms”
Claim · model-written summary
Increasing P at the intermediate Fe level first increased corn yield.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- increasing the Pe5
- Outcome
- yielde5
- Direction
- increasede5
- Comparator
- intermediate Fe levele5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn ( Zea mays L.) and pinto beans ( Phaseolus vulgaris ) were used as test crops to study the interactions between P, Fe, and Zn in a calcareous solution culture”
e5“By increasing the P at the intermediate Fe level the yield first increased”
Claim · model-written summary
Further P increase caused P-induced Fe deficiency and a depression in corn yield at a P/Fe ratio above 60.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- increasing the Pe5
- Outcome
- yielde6
- Direction
- depressione6
- Qualifier
- a P/Fe ratio > 60e7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn ( Zea mays L.) and pinto beans ( Phaseolus vulgaris ) were used as test crops to study the interactions between P, Fe, and Zn in a calcareous solution culture”
e5“By increasing the P at the intermediate Fe level the yield first increased”
e6“accompanied by a depression in yield”
e7“related to high P concentration in the plant tissue, which resulted in a P/Fe ratio > 60”
Claim · model-written summary
A P/Zn concentration ratio above 300 caused a slight depression in corn yield when Fe supply was adequate.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- adequate supply of Fee1
- Outcome
- yielde1
- Direction
- depressione1
- Qualifier
- P/Zn concentration ratio > 300e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn ( Zea mays L.) and pinto beans ( Phaseolus vulgaris ) were used as test crops to study the interactions between P, Fe, and Zn in a calcareous solution culture”
e1“A P/Zn concentration ratio > 300 resulted in a slight depression in yield in the presence of an adequate supply of Fe”
Claim · model-written summary
Adding Fe did not change the Fe concentration in the plant.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- addition of Fee2
- Outcome
- Fe concentratione2
- Direction
- did not changee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn ( Zea mays L.) and pinto beans ( Phaseolus vulgaris ) were used as test crops to study the interactions between P, Fe, and Zn in a calcareous solution culture”
e2“The addition of Fe did not change the Fe concentration but corrected the depression in yield”
Claim · model-written summary
The yield depression caused by Zn-Fe and P-Fe-Zn antagonism was not found with pinto bean at the concentrations studied.
Verbatim
e2“The depression in yield associated with the antagonistic effect of Zn on Fe and P on Fe and Zn, although manifested on corn, was not found with pinto bean at the concentration levels studied”
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