POSTHARVEST QUALITY OF APPLES GROWN IN THE ALAND ISLANDS
In four orchards, apple cultivars Transparente Blanche, Samo, Raike, Red Atlas, Lobo and Aroma were sprayed with calcium chloride solution during fruit development. Apples were stored for 4 to 6 months at +2 – 4°C and 90 – 95% relative humidity. Samples were analyzed for N, P, K, Ca and Mg, fruit diameter, firmness, and soluble solids and titratable acidity in juice. The incidence of physiological storage disorders was also recorded. During storage, firmness/diameter and titratable acidity decreased and sugar/acid ratio increased. The incidence of physiological storage disorders was highest in 'Red Atlas' and 'Raike' and lowest in 'Lobo'. Calcium treatment increased N and Ca, and decreased the ratios K/Ca, P/Ca and Mg/Ca. Delayed ripening in calcium treated apples was indicated by increase in juice acidity and decrease in sugar/acid ratio. The calcium treatment was successful in reducing the incidence of physiological storage disorders in 'Red Atlas' and 'Aroma'.
Dris, R. (1998). POSTHARVEST QUALITY OF APPLES GROWN IN THE ALAND ISLANDS. Acta Hortic. 466, 35-40
Malus domestica Borkh, harvest, nutrients, storage