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Open AccessArticle

Early Season Foliar Iron Fertilization Increases Fruit Yield and Quality in Pomegranate

1
Department of Horticultural Science and Landscape, Ferdowsi University of Mashhad, Mashhad 9177948974, Iran
2
Department of Horticultural Science, College of Agriculture, University of Zabol, Zabol 53898615, Iran
3
Department of Plant Nutrition, Estación Experimental de Aula Dei (EEAD-CSIC), 50059 Zaragoza, Spain
*
Authors to whom correspondence should be addressed.
Agronomy 2020, 10(6), 832; https://doi.org/10.3390/agronomy10060832
Received: 4 May 2020 / Revised: 4 June 2020 / Accepted: 10 June 2020 / Published: 12 June 2020
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. View Full-Text
Keywords: Punica granatum L.; foliar fertilization; iron chlorosis; iron deficiency; fruit quality Punica granatum L.; foliar fertilization; iron chlorosis; iron deficiency; fruit quality
MDPI and ACS Style

Davarpanah, S.; Tehranifar, A.; Zarei, M.; Aran, M.; Davarynejad, G.; Abadía, J. Early Season Foliar Iron Fertilization Increases Fruit Yield and Quality in Pomegranate. Agronomy 2020, 10, 832. https://doi.org/10.3390/agronomy10060832

AMA Style

Davarpanah S, Tehranifar A, Zarei M, Aran M, Davarynejad G, Abadía J. Early Season Foliar Iron Fertilization Increases Fruit Yield and Quality in Pomegranate. Agronomy. 2020; 10(6):832. https://doi.org/10.3390/agronomy10060832

Chicago/Turabian Style

Davarpanah, Sohrab; Tehranifar, Ali; Zarei, Mahvash; Aran, Mehdi; Davarynejad, Gholamhossein; Abadía, Javier. 2020. "Early Season Foliar Iron Fertilization Increases Fruit Yield and Quality in Pomegranate" Agronomy 10, no. 6: 832. https://doi.org/10.3390/agronomy10060832

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