Abstract
In soil-less culture systems Fe is usually supplied as chelate to ensure an adequate availability of this element. As chelates have affinity for many metal ions these chelates will interact with other cation nutrients in nutrient solutions. This affects the availability of Fe and other nutrients. The effects of Fe-chelate types, pH, and Zn concentrations on the availability of Fe, Zn and other micro nutrients in the nutrient solution were tested with rock wool grown cucumber as test crop. In the first experiment the Fe-chelates DTPA, EDDHA and HEEDTA (25 μmol L-1) and Zn target values of 5, 25 and 50 μmol L-1 in the root environment were compared. In the second experiment DTPA and EDDHA and Zn target values of 5 and 50 μmol L-1 at two pH ranges: 5-5.5 and 6.0-6.5 were compared. No yield nor fruit quality were significant affected in both trials. Chlorosis occurred severely at the high pH levels but was not significantly different among the chelate- or Zn treatments Necrosis of leaf margin occurred with the DTPA treatments, specifically at high pH. The required Fe-chelate dosage to keep the target levels of Fe was much higher for HEEDTA than for DTPA and EDDHA, at high pH a higher dose of DTPA was needed than for EDDHA in particular with increasing Zn levels. The Fe uptake was not significantly affected by the treatments. The Zn uptake increased with the supply. Interaction of chelate type and pH was found. With EDDHA the Zn uptake was three to five times higher than with DTPA and HEEDTA at high pH. This was in line with the much higher Zn supply needed with EDDHA at high pH The results of these experiments draw the attention to the effects of different Fe chelates on the availability of several micro nutrients to plants, which apparently can be explained by a different behavior to complexation.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 11
Claim · model-written summary
Yield was not significantly affected in either trial.
- Taxon
- cucumber
Cucumis sativust0 - Outcome
- yielde0
- Direction
- Noe0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No yield nor fruit quality were significant affected in both trials.”
t0“cucumber (Cucumis sativus L.)”
Claim · model-written summary
Fruit quality was not significantly affected in either trial.
- Taxon
- cucumberCucumis sativust0
- Outcome
- fruit qualitye0
- Direction
- Noe0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No yield nor fruit quality were significant affected in both trials.”
t0“cucumber (Cucumis sativus L.)”
Claim · model-written summary
Chlorosis was severe at high pH.
- Taxon
- cucumberCucumis sativust0
- Treatment
- high pH levelse0
- Outcome
- Chlorosis occurred severelye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chlorosis occurred severely at the high pH levels”
t0“cucumber (Cucumis sativus L.)”
Claim · model-written summary
Chlorosis did not differ significantly across chelate or Zn treatments.
- Taxon
- cucumberCucumis sativust0
- Treatment
- chelate- or Zn treatmentse0
- Outcome
- Chlorosise1
- Direction
- not significantly differente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“was not significantly different among the chelate- or Zn treatments”
e1“Chlorosis occurred severely at the high pH levels”
t0“cucumber (Cucumis sativus L.)”
Claim · model-written summary
Leaf margin necrosis occurred with DTPA, especially at high pH.
- Taxon
- cucumberCucumis sativust0
- Treatment
- DTPA treatmentse0
- Outcome
- Necrosis of leaf margine0
- Qualifier
- high pHe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Necrosis of leaf margin occurred with the DTPA treatments, specifically at high pH.”
t0“cucumber (Cucumis sativus L.)”
Claim · model-written summary
HEEDTA required a much higher Fe chelate dose than DTPA and EDDHA.
- Taxon
- cucumberCucumis sativust0
- Outcome
- required Fe-chelate dosagee0
- Direction
- much highere0
- Comparator
- DTPA and EDDHAe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The required Fe-chelate dosage to keep the target levels of Fe was much higher for HEEDTA than for DTPA and EDDHA”
t0“cucumber (Cucumis sativus L.)”
Claim · model-written summary
At high pH, DTPA required a higher dose than EDDHA, particularly with increasing Zn.
- Taxon
- cucumberCucumis sativust0
- Outcome
- dose of DTPAe0
- Direction
- highere0
- Qualifier
- high pHe0
- Comparator
- EDDHAe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“at high pH a higher dose of DTPA was needed than for EDDHA in particular with increasing Zn levels”
t0“cucumber (Cucumis sativus L.)”
Claim · model-written summary
Fe uptake was not significantly affected by treatments.
- Taxon
- cucumberCucumis sativust0
- Treatment
- treatmentse0
- Outcome
- Fe uptakee0
- Direction
- not significantly affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Fe uptake was not significantly affected by the treatments.”
t0“cucumber (Cucumis sativus L.)”
Claim · model-written summary
Zn uptake increased with supply.
- Taxon
- cucumberCucumis sativust0
- Treatment
- supplye0
- Outcome
- Zn uptakee0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Zn uptake increased with the supply.”
t0“cucumber (Cucumis sativus L.)”
Claim · model-written summary
At high pH, EDDHA produced three to five times higher Zn uptake than DTPA and HEEDTA.
- Taxon
- cucumberCucumis sativust0
- Treatment
- EDDHAe0
- Outcome
- Zn uptakee0
- Direction
- highere0
- Value
- three to five timese0
- Qualifier
- high pHe0
- Comparator
- DTPA and HEEDTAe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With EDDHA the Zn uptake was three to five times higher than with DTPA and HEEDTA at high pH.”
t0“cucumber (Cucumis sativus L.)”
Claim · model-written summary
EDDHA required much higher Zn supply at high pH.
- Taxon
- cucumberCucumis sativust0
- Outcome
- Zn supply needede0
- Direction
- much highere0
- Qualifier
- high pHe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the much higher Zn supply needed with EDDHA at high pH”
t0“cucumber (Cucumis sativus L.)”
The same questions in other papers
zinc atom · physiology: pigments · Cucumis sativus (cucumber)Positive and negative results
2 papers in the same direction as this paper · 3 in the opposite direction
- positive
- positive
- positive
2 papers more in this group
See all 6 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.