Abstract
Zinc deficiency symptoms have been observed on corn ( Zea mays L.) grown on coarse‐textured, high‐pH soils in the Mississippi Delta. To correct deficiencies, many corn producers apply foliar Zn. Corn injury from foliar Zn application has been observed; however, it is not clear whether foliar Zn injury affects grain yield. Also, little information currently exists about the ability of foliar Zn sources to increase corn tissue Zn concentration. Therefore, the purpose of this study was to determine the effect of Zn source and Zn application rate on foliar injury, tissue Zn concentration, and grain yield in corn. Zinc‐citrate, Zn–ethylenediaminetetraacetic acid (EDTA), and ZnSO 4 were applied to corn at 0.56, 1.12, and 2.24 kg Zn ha −1 at V4. Corn injury was evaluated 3, 6, and 9 d after application, and tissue Zn concentration was determined 2 wk after Zn application. Grain yield was determined at harvest. Zinc‐citrate imparted the greatest injury at all application rates, followed by ZnSO 4 and Zn‐EDTA. Injury generally increased as Zn application rate increased. The 0.56 kg Zn ha −1 rate resulted in similar tissue Zn content across all Zn sources. Zinc‐citrate and ZnSO 4 application resulted greater tissue Zn content than Zn‐EDTA at 1.12 and 2.24 kg Zn ha −1 rates. Despite high levels of foliar injury observed for some Zn sources and rates, no differences in grain yield were observed. Citrate‐Zn application to corn caused more foliar injury than EDTA‐Zn and Zinc sulfate. Citrate‐Zn resulted in highest corn tissue Zn concentrations. Corn injury from foliar Zn application did not affect grain yield.
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Claims 6
Claim · model-written summary
Zinc-citrate caused the greatest corn injury, followed by zinc sulfate and zinc EDTA.
- Taxon
- Corn
Zea mays subsp. mayst0 - Treatment
- Zinc‐citratee0
- Outcome
- injurye0
- Direction
- greateste0
- Qualifier
- at all application ratese0
- Comparator
- ZnSO 4 and Zn‐EDTAe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zinc‐citrate imparted the greatest injury at all application rates, followed by ZnSO 4 and Zn‐EDTA.”
t0“Corn Injury from Foliar Zinc Application Does Not Affect Grain Yield”
Claim · model-written summary
Corn injury generally rose as zinc application rate increased.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- Zn application ratee0
- Outcome
- Injurye0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Injury generally increased as Zn application rate increased.”
t0“Corn Injury from Foliar Zinc Application Does Not Affect Grain Yield”
Claim · model-written summary
At 0.56 kg Zn ha −1, tissue zinc content was similar across sources.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- 0.56 kg Zn ha −1e0
- Outcome
- tissue Zn contente0
- Direction
- similare0
- Comparator
- all Zn sourcese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 0.56 kg Zn ha −1 rate resulted in similar tissue Zn content across all Zn sources.”
t0“Corn Injury from Foliar Zinc Application Does Not Affect Grain Yield”
Claim · model-written summary
At 1.12 and 2.24 kg Zn ha −1, zinc citrate produced greater tissue zinc than zinc EDTA.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- Zinc‐citratee0
- Outcome
- tissue Zn contente0
- Direction
- greatere0
- Qualifier
- at 1.12 and 2.24 kg Zn ha −1 ratese0
- Comparator
- Zn‐EDTAe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zinc‐citrate and ZnSO 4 application resulted greater tissue Zn content than Zn‐EDTA at 1.12 and 2.24 kg Zn ha −1 rates.”
t0“Corn Injury from Foliar Zinc Application Does Not Affect Grain Yield”
Claim · model-written summary
At 1.12 and 2.24 kg Zn ha −1, zinc sulfate produced greater tissue zinc than zinc EDTA.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- ZnSO 4e0
- Outcome
- tissue Zn contente0
- Direction
- greatere0
- Qualifier
- at 1.12 and 2.24 kg Zn ha −1 ratese0
- Comparator
- Zn‐EDTAe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zinc‐citrate and ZnSO 4 application resulted greater tissue Zn content than Zn‐EDTA at 1.12 and 2.24 kg Zn ha −1 rates.”
t0“Corn Injury from Foliar Zinc Application Does Not Affect Grain Yield”
Claim · model-written summary
Grain yield did not differ among zinc sources and rates despite some high foliar injury.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- Zn sources and ratese0
- Outcome
- grain yielde0
- Direction
- no differencese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Despite high levels of foliar injury observed for some Zn sources and rates, no differences in grain yield were observed.”
t0“Corn Injury from Foliar Zinc Application Does Not Affect Grain Yield”
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See all 46 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.