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The effect of training systems and planting density on growth and fruiting of plum trees budded on divaricata prune seedling rootstock

Zygmunt S. Grzyb, Mirosław Sitarek

Research Institute of Pomology and Floriculture
Pomologiczna 18, 96-100 Skierniewice, Poland
e-mail: zgrzyb@insad.pl, msitarek@insad.pl

‘Amers’ plum trees (Prunus domestica L.) budded on seedlings of P. cerasifera var. divaricata Led. were planted in the spring of 1994 at the Experimental Orchard in D±browice near Skierniewice. The trees were planted at a distance of 4.5 m between rows and in diverse distances in the row (2.0, 2.5, 3.0 m). Two training systems were applied - regulated tree and spindle. Dense planting of plums suppressed more growth intensity of spindle trees than regulated trees. Trees trained as spindle produced a lower yield than lightly pruned regulated ones. Diverse planting distances had an effect on yield per tree and the crop calculated in tons per hectare - the greater the planting density, the lower the cumulative yield per tree but the higher the production per ha. Planting density had no effect on fruit quality but the system of training did so. Mean fruit weight from spindle trees was generally greater than that from regulated ones.

Grzyb Z.S., Sitarek M., 2003. The effect of training systems and planting density on growth and fruiting of plum trees budded on divaricata prune seedling rootstock. Folia Horticulturae 15/1: 69-74.