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Evaluation of ‘Jonagold’ apple trees on M.9 rootstock produced in different nurseries. I. Tree growth and fruiting

Władysław Poniedziałek, Kazimierz Nosal, Stanisław Porębski, Przemysław Banach

Department of Pomology
Faculty of Horticulture, University of Agriculture in Kraków
29 Listopada 54, 31-425 Kraków, Poland

‘Jonagold’ apple trees on M.9 rootstock from Holland, the Czech Republic, and 12 Polish nurseries were investigated in an experiment carried out at Garlica Murowana Experimental Station in the years 1992-1999. Before planting, the young apple trees showed various quality, hence it was possible to class them into five groups. After eight years in the orchard the trees were more uniform. The growth of trees from the Czech Republic was very poor but not significantly different from that of trees from Holland and Lublin. The trees produced in Kraków were strong but did not differ from these produced in nine Polish nurseries. No linear relation was determined between the quality of trees planted in the orchard and their growth there. Very good crop efficiency index (CEI, kg cm-2) was shown by the trees from the Czech Republic, though their fruit had the smallest mass. The same level of CEI (kg cm-2) was found in the Dutch trees and those from nine Polish nurseries. The Kraków trees were less efficient (kg cm-2) but they did not significantly differ from those produced in eight Polish nurseries. Good productivity and a great mass of fruit was shown by the trees from the Polish nursery in Puławy. Out of 12 Polish nurseries investigated in nine the produced planting material was characterized by the CEI equal to that of standard Dutch trees imported into Poland in 1991.

Poniedziałek W., Nosal K., Porębski S., Banach P., 2000. Evaluation of ‘Jonagold’ apple trees on M.9 rootstock produced in different nurseries. I. Tree growth and fruiting. Folia Horticulturae 12/2: 53-61.