Abstract
Early season foliar fertilization with different nutrients is a promising tool in pomegranate grown in poor, high pH soils. The effects of foliar fertilization with FeSO4 and the synthetic chelate Fe(III)-EDDHA (Fe(III)-ethylendiaminedi(o-hydroxyphenylacetate)) on fruit yield and physicochemical characteristics were assessed in a two-season field trial. Fertilizers were sprayed at full bloom and one month later, using Fe concentrations of 1.3 and 2.6 mM for FeSO4 and 1.1 and 2.1 mM for the Fe-chelate. Both doses of FeSO4 and the higher chelate dose increased leaf Fe concentrations and fruit yield, with the best results being observed with 2.6 mM FeSO4 (20–31% increases in yield). On the other hand, leaf N, P, K, Ca, and Mn concentrations were not affected by foliar Fe fertilization. The only treatment that increased the number of fruits per tree, aril juice content and juice total soluble solids and decreased juice total acidity in both seasons was 2.6 mM FeSO4. Both FeSO4 doses caused consistent increases in the maturity index and total sugars in juice, along with minor decreases in juice total phenolic compounds. The antioxidant activity in juice was slightly decreased by 2.6 mM FeSO4. In conclusion, early season foliar Fe fertilization had positive effects on pomegranate yield and quality, with FeSO4 being better than Fe(III)-EDDHA.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. 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 12
Claim · model-written summary
Both FeSO4 doses increased leaf Fe concentrations.
- Taxon
- pomegranate
Punica granatumt0 - Treatment
- Both doses of FeSO4e0
- Outcome
- leaf Fe concentrationse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both doses of FeSO4 and the higher chelate dose increased leaf Fe concentrations and fruit yield”
t0“Pomegranate”
Claim · model-written summary
Both FeSO4 doses increased fruit yield.
- Taxon
- pomegranatePunica granatumt0
- Treatment
- Both doses of FeSO4e0
- Outcome
- fruit yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both doses of FeSO4 and the higher chelate dose increased leaf Fe concentrations and fruit yield”
t0“Pomegranate”
Claim · model-written summary
The higher chelate dose increased leaf Fe concentrations.
- Taxon
- pomegranatePunica granatumt0
- Treatment
- higher chelate dosee0
- Outcome
- leaf Fe concentrationse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both doses of FeSO4 and the higher chelate dose increased leaf Fe concentrations and fruit yield”
t0“Pomegranate”
Claim · model-written summary
The higher chelate dose increased fruit yield.
- Taxon
- pomegranatePunica granatumt0
- Treatment
- higher chelate dosee0
- Outcome
- fruit yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both doses of FeSO4 and the higher chelate dose increased leaf Fe concentrations and fruit yield”
t0“Pomegranate”
Claim · model-written summary
The 2.6 mM FeSO4 treatment increased yield by 20–31%.
- Taxon
- pomegranatePunica granatumt0
- Treatment
- 2.6 mM FeSO4e0
- Outcome
- yielde0
- Direction
- increasese0
- Value
- 20–31%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“2.6 mM FeSO4 (20–31% increases in yield)”
t0“Pomegranate”
Claim · model-written summary
Foliar Fe fertilization did not affect leaf N, P, K, Ca, or Mn concentrations.
- Taxon
- pomegranatePunica granatumt0
- Treatment
- foliar Fe fertilizatione0
- Outcome
- leaf N, P, K, Ca, and Mn concentrationse0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leaf N, P, K, Ca, and Mn concentrations were not affected by foliar Fe fertilization”
t0“Pomegranate”
Claim · model-written summary
The 2.6 mM FeSO4 treatment increased fruits per tree, aril juice content and total soluble solids in both seasons.
- Taxon
- pomegranatePunica granatumt0
- Treatment
- 2.6 mM FeSO4e0
- Outcome
- number of fruits per tree, aril juice content and juice total soluble solidse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The only treatment that increased the number of fruits per tree, aril juice content and juice total soluble solids and decreased juice total acidity in both seasons was 2.6 mM FeSO4.”
t0“Pomegranate”
Claim · model-written summary
The 2.6 mM FeSO4 treatment decreased juice total acidity in both seasons.
- Taxon
- pomegranatePunica granatumt0
- Treatment
- 2.6 mM FeSO4e0
- Outcome
- juice total aciditye0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“decreased juice total acidity in both seasons was 2.6 mM FeSO4”
t0“Pomegranate”
Claim · model-written summary
Both FeSO4 doses increased juice maturity index and total sugars.
- Taxon
- pomegranatePunica granatumt0
- Treatment
- Both FeSO4 dosese0
- Outcome
- maturity index and total sugars in juicee0
- Direction
- increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both FeSO4 doses caused consistent increases in the maturity index and total sugars in juice”
t0“Pomegranate”
Claim · model-written summary
Both FeSO4 doses caused minor decreases in juice total phenolic compounds.
- Taxon
- pomegranatePunica granatumt0
- Treatment
- Both FeSO4 dosese0
- Outcome
- juice total phenolic compoundse0
- Direction
- decreasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both FeSO4 doses caused consistent increases in the maturity index and total sugars in juice, along with minor decreases in juice total phenolic compounds”
t0“Pomegranate”
Claim · model-written summary
The 2.6 mM FeSO4 treatment slightly decreased juice antioxidant activity.
- Taxon
- pomegranatePunica granatumt0
- Treatment
- 2.6 mM FeSO4e0
- Outcome
- antioxidant activity in juicee0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The antioxidant activity in juice was slightly decreased by 2.6 mM FeSO4”
t0“Pomegranate”
Claim · model-written summary
FeSO4 was judged better than Fe(III)-EDDHA for improving pomegranate yield and quality.
- Taxon
- pomegranatePunica granatume0
- Outcome
- FeSO4 being better than Fe(III)-EDDHAe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“early season foliar Fe fertilization had positive effects on pomegranate yield and quality, with FeSO4 being better than Fe(III)-EDDHA”
The same questions in other papers
iron atom · nutrient: content · Punica granatum (pomegranate)Results differ
2 in the opposite direction
- positive
- positive
fertilization · nutrient: content · Punica granatum (pomegranate)Positive and negative results
1 paper in the same direction as this paper · 8 in the opposite direction
- no effect
- positive
- positive
6 papers more in this group
See all 10 papers →application · nutrient: content · Punica granatum (pomegranate)Positive and negative results
12 in the opposite direction
- positive
- positive
- positive
9 papers more in this group
See all 13 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.