Abstract
Abstract Severely chlorotic ‘Red Delicious’ apple ( Malus domestica Borkh.) trees growing on a calcareous soil were treated for iron (Fe) chlorosis with pressure injections of 1.0% (w:w) solutions of ferrous sulfate, ferric citrate, or Fe-Sequestrene-330 (Fe-330). Injections were made in September of 1981 and in April, June, and July of 1983. All treatments increased chlorophyll concentrations compared to controls, and treatments made in September of 1981 and in April and June of 1983 increased shoot growth during the 1983 growing season compared to controls. Although the treatments did result in a temporary increase in foliar Fe content, there was not a strong correlation between foliar Fe and chlorophyll concentration. Ferrous sulfate and Fe-330 were more effective than ferric citrate in alleviating chlorosis. Injections made in April and June of 1983 greatly increased bloom in May of 1984, compared to trees injected in July of 1983 and the untreated controls. Hence, injections should be made early in the season (before July) in order to promote bloom the following growing season.
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Claims 8
Claim · model-written summary
All three injected iron treatments increased apple chlorophyll concentrations over controls.
- Taxon
- Apple Trees
Malus domesticat0 - Treatment
- All treatmentse0
- Outcome
- chlorophyll concentrationse0
- Direction
- increasede0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All treatments increased chlorophyll concentrations compared to controls”
t0“Apple Trees”
Claim · model-written summary
September 1981 and April and June 1983 injections increased shoot growth versus controls.
- Taxon
- Apple TreesMalus domesticat0
- Treatment
- treatments made in September of 1981 and in April and June of 1983e0
- Outcome
- shoot growthe0
- Direction
- increasede0
- Qualifier
- during the 1983 growing seasone0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“treatments made in September of 1981 and in April and June of 1983 increased shoot growth during the 1983 growing season compared to controls”
t0“Apple Trees”
Claim · model-written summary
Iron injections temporarily increased foliar iron content.
- Taxon
- Apple TreesMalus domesticat0
- Treatment
- the treatmentse0
- Outcome
- foliar Fe contente0
- Direction
- increasee0
- Qualifier
- temporarye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the treatments did result in a temporary increase in foliar Fe content”
t0“Apple Trees”
Claim · model-written summary
Foliar iron content was weakly correlated with chlorophyll concentration.
- Taxon
- Apple TreesMalus domesticat0
- Compound
- foliar Fee0
- Outcome
- chlorophyll concentratione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was not a strong correlation between foliar Fe and chlorophyll concentration”
t0“Apple Trees”
Claim · model-written summary
Ferrous sulfate was more effective than ferric citrate at alleviating chlorosis.
- Taxon
- Apple TreesMalus domesticat0
- Treatment
- Ferrous sulfatee0
- Outcome
- alleviating chlorosise0
- Direction
- more effectivee0
- Comparator
- ferric citratee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ferrous sulfate and Fe-330 were more effective than ferric citrate in alleviating chlorosis”
t0“Apple Trees”
Claim · model-written summary
Fe-330 was more effective than ferric citrate at alleviating chlorosis.
- Taxon
- Apple TreesMalus domesticat0
- Treatment
- Fe-330e0
- Outcome
- alleviating chlorosise0
- Direction
- more effectivee0
- Comparator
- ferric citratee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ferrous sulfate and Fe-330 were more effective than ferric citrate in alleviating chlorosis”
t0“Apple Trees”
Claim · model-written summary
April and June 1983 injections greatly increased May 1984 bloom compared with July injections and untreated controls.
- Taxon
- Apple TreesMalus domesticat0
- Treatment
- Injections made in April and June of 1983e0
- Outcome
- bloome0
- Direction
- increasede0
- Qualifier
- May of 1984e0
- Comparator
- trees injected in July of 1983 and the untreated controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Injections made in April and June of 1983 greatly increased bloom in May of 1984, compared to trees injected in July of 1983 and the untreated controls”
t0“Apple Trees”
Claim · model-written summary
The authors recommend iron injections before July to promote bloom the following season.
- Taxon
- Apple TreesMalus domesticat0
- Outcome
- injections should be made early in the season (before July) in order to promote bloom the following growing seasone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“injections should be made early in the season (before July) in order to promote bloom the following growing season”
t0“Apple Trees”
The same questions in other papers
iron atom · physiology: pigments · Malus domestica (apple)Positive and negative results
7 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
5 papers more in this group
See all 9 papers →iron(2+) sulfate (anhydrous) · physiology: pigments · Malus domestica (apple)Results agree
2 papers in the same direction as this paper
- positive
- positive
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.