Abstract
Fertilizers are commonly applied to improve the yield and quality in orchards. But unbalanced fertilization negatively affects the nutrient contents of the fruits. Fruits with low energy and high mineral and vitamin contents are significant foods for human nutrition and human health. This study was carried out with ‘0900 Ziraat’ sweet cherry cultivar grafted on ‘Gisela 5’ rootstock in two consecutive years. The effects of different nitrogen (N) and Potassium (K) doses on nutrient content of fruits were investigated. Different doses of N (0, 50, 125 and 250 g N tree-1) and K (0, 50, 125 and 250 g K2O tree-1) were applied beneath the tree canopy in 6 replications and 1 tree in every replication in two consecutive years. Fruit samples were harvested from each tree and fruit colour, firmness, cracking index and nutrient contents (N, P, K, Ca, Mg, Fe, Zn and B) were determined. Fruit N content, N:K ratio, L*, a*, C* and firmness values increased with increasing N doses. While K fertilization did not have significant effects on K content and N:K ratio, it negatively influenced the N content of the fruits. It was concluded that N fertilization directly influenced fruit quality attributes, but K fertilization did not have any significant effects on fruit quality parameters.
Highlights
Sweet cherry (Prunus avium L.) has an important place in fruit culture of Turkey (Sarisu and Demirtas, 2015)
Increasing N doses had positive effects on desired fruit quality attributes like fruit color and flesh firmness and optimum values were obtained from 125 g N tree-1 treatment
Such effects were not observed in K fertilization
Summary
Sweet cherry (Prunus avium L.) has an important place in fruit culture of Turkey (Sarisu and Demirtas, 2015). The cultivar ‘0900 Ziraat’ has played an important role in forming this concept. Firm, and sweet fruits, ‘0900 Ziraat’ has become one of the most popular cherry cultivars of the world (Kaska, 2001). About 440.000,00 tons of world sweet cherry production, which is 2.240.000,00 tons, is produced in Turkey and such an amount corresponds to about 20% of total world production. Turkey with this production is the leading producer of the world (TUIK, 2014) and about 20% of its production takes place in the province of Isparta
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