ISHS Acta Horticulturae 448: III International Symposium on Mineral Nutrition of Deciduous Fruit Trees
EFFECT OF CALCIUM ON THE STORAGE QUALITY OF APPLES GROWN IN FINLAND |
| Authors: | R. Dris, R. Niskanen |
| Keywords: | cultivars, disorders, firmness, juice pH, Malus domestica Borkh., nutrients, soluble solids, apple, calcium, storage quality |
| Abstract:
In 12 orchards in the Åland Islands located in the southwest of Finland, fruitlets of several apple cultivars on an A2 rootstock were sprayed with a CaCl2 solution several times during the growing seasons of 1993 and 1994. The calcium concentrations of the spraying solution were 1.3 and 2.0 g/l in the experimental years, respectively. Apples were stored between 3 to 6 months at +2 to +4 °C and at 90–95 % relative humidity. In 1993, N and Ca concentrations increased, and K, Mg and P concentrations as well as pH and the concentration of soluble solids in juice decreased in treated apples of some cultivars but fruit firmness and incidence of storage disorders were not affected. In 1994, the concentrations of N, P, K, and B in some cultivars increased significantly, and the occurrence of physiological storage disorders was reduced by the treatment. | |
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