Abstract
The effectiveness on controlling Fe chlorosis in orange trees grown on calcareous soils was tested. The treatments were Fe(II) sulfate (500 mg Fe L−1), sulfuric acid (0.5 mM H2SO4), Fe(III)-chelate (Hampiron 654 GS, 120 mg Fe L−1) and distilled water as a control. A non-ionic wetting agent was used in all treatments. The use of frequent foliar sprays alleviated Fe chlorosis in orange trees. Sprays of Fe(II) sulfate increased the concentrations of chlorophyll, Fe and zinc in leaves and improved fruit size and quality compared to fruits of control trees. Sprays of Fe(III)-chelate also increased leaf chlorophyll and Fe concentrations and improved fruit quality, but did not increase fruit size. Sprays of sulfuric acid alone slightly increased leaf chlorophyll and Fe concentrations, without improving fruit size and quality. These results suggest that foliar sprays with Fe could help to avoid yield and quality losses caused by Fe chlorosis in citrus orchards. Furthermore, these treatments could be done with relatively cheap materials such as solutions containing Fe(II) sulfate.
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Claims 9
Claim · model-written summary
Frequent foliar sprays alleviated iron chlorosis.
Not reportedComparator
Verbatim
e0“frequent foliar sprays alleviated Fe chlorosis in orange trees”
Claim · model-written summary
Fe(II) sulfate sprays increased leaf chlorophyll, iron and zinc concentrations.
- Taxon
- orange treest0
- Organ / stage
- leavese0
- Treatment
- Sprays of Fe(II) sulfatee0
- Outcome
- concentrations of chlorophyll, Fe and zince0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“Sprays of Fe(II) sulfate increased the concentrations of chlorophyll, Fe and zinc in leaves”
t0“orange trees”
Claim · model-written summary
Fe(II) sulfate sprays improved fruit size and quality against controls.
Verbatim
e0“improved fruit size and quality compared to fruits of control trees”
t0“orange trees”
e1“Sprays of Fe(II) sulfate increased”
Claim · model-written summary
Fe(III)-chelate sprays increased leaf chlorophyll and iron concentrations.
- Taxon
- orange treest0
- Treatment
- Sprays of Fe(III)-chelatee0
- Outcome
- leaf chlorophyll and Fe concentrationse0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“Sprays of Fe(III)-chelate also increased leaf chlorophyll and Fe concentrations”
t0“orange trees”
Claim · model-written summary
Fe(III)-chelate sprays improved fruit quality.
Not reportedComparator
Verbatim
e0“improved fruit quality”
t0“orange trees”
e1“Sprays of Fe(III)-chelate also increased”
Claim · model-written summary
Fe(III)-chelate sprays did not increase fruit size.
Not reportedComparator
Verbatim
e0“did not increase fruit size”
t0“orange trees”
e1“Sprays of Fe(III)-chelate also increased”
Claim · model-written summary
Sulfuric acid alone slightly increased leaf chlorophyll and iron concentrations.
- Taxon
- orange treest0
- Treatment
- Sprays of sulfuric acid alonee0
- Outcome
- leaf chlorophyll and Fe concentrationse0
- Direction
- slightly increasede0
Not reportedComparator
Verbatim
e0“Sprays of sulfuric acid alone slightly increased leaf chlorophyll and Fe concentrations”
t0“orange trees”
Claim · model-written summary
Sulfuric acid alone did not improve fruit size or quality.
- Taxon
- orange treest0
- Treatment
- sulfuric acid alonee1
- Outcome
- fruit size and qualitye0
- Direction
- without improvinge0
Not reportedComparator
Verbatim
e0“without improving fruit size and quality”
t0“orange trees”
e1“sulfuric acid alone”
Claim · model-written summary
Authors suggest foliar iron sprays to avoid yield and quality losses from chlorosis.
Verbatim
e0“foliar sprays with Fe could help to avoid yield and quality losses caused by Fe chlorosis”
t0“orange trees”
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See all 19 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.