Effects of Potassium Fertilization on Sweet Cherry Fruit (Prunus avium L.) Quality and Mineral Content

ABSTRACT

Potassium (K) is present in higher concentrations than other macronutrients in cherry fruits and is most often associated with changes in fruit quality. This study was carried out in the Sultandağı district of Afyon province between 2015 and 2017 in the cultivation “ziraat 900” sweet cherry cultivar grafted Prunus padus rootstock on aged 15–20 years. The effects of soil K applications (as potassium sulfate (K₂SO₄) on sweet cherry quality and mineral content were investigated. Different concentrations of K₂SO₄ (0, 500, 1000, and 1500 g trees⁻¹) were applied under the canopy at one time before full bloom. After harvested fruit length, fruit weight, flesh firmness, water-soluble dry matter (WDM), and mineral content [Calcium (Ca), Magnesium (Mg), Potassium (K), Phosphorus (P), Iron (Fe), Copper (Cu), Zinc (Zn), Manganese (Mn)] were determined. Fruit quality criteria (fruit length, weight, flesh firmness, and WDM content), fruit K and Cu contents values increased depending on the application of K. It was observed that fruit length increased by 9%, fruit weight by 23%, flesh firmness by 24% and WDM content by 20% due to K applications. Potassium application decreased the content of Ca and Mg. This study indicates that the application of K caused an increase in the fruit quality of the sweet cherry.

KEYWORDS:

• Potassium application
• Prunus avium L.
• quality
• sweet cherry

Acknowledgments

This study was financially supported by the General Directorate of Agricultural Research And Policies (Project No: Tagem/Tskad/12/A13/P4/7).

Disclosure statement

No potential conflict of interest was reported by the author(s).