Folia Horticulturae

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The effect of the root system type on growth and productivity of ‘Schattenmorelle’ sour cherry trees

Tomasz Krupa, Ewa Jadczuk, Anna Pietranek

Department of Pomology and Basic Natural Sciences in Horticulture
Warsaw Agricultural University
Nowoursynowska 166, 02-787 Warszawa, Poland

The effect of the root type and clone of ‘Schattenmorelle’ sour cherry trees upon the growth and productivity was studied in the years 1997-2000. Four types of 'Schattenmorelle' maiden trees were compared: (1) clone No. 226 on Prunus avium seedling sel. Altenweddingen; (2) clone No. 226/80 on P. avium Altenweddingen; (3) clone No. 226/80 on P. avium of Polish selection (B. Czarnecki), and (4) clone No. 226/80 self-rooted, propagated by green cuttings. The self-rooted trees showed a lower vigour than the trees on rootstocks. This was manifested by a significantly reduced increase in the trunk cross section area (TCSA) in successive biennial periods and throughout the experiment. During the whole four years of study, the size of self-rooted trees (expressed as TCSA) was 26% smaller while twelve years of study their size was 32% smaller, compared with the trees of rootstock. No differences in vegetative growth were observed between two clones of ‘Schattenmorelle’. In the years 1997, 1998 and 1999 no significant differences in the number of fruits per 100 clusters were noted. However, self-rooted trees gave a better fruit set. Yield per tree was affected by the type of root system, except for the years 1997 and 2000. Trees on P. avium seedling rootstock gave a higher yield per tree than self-rooted trees. Self-rooted trees yielded about 17-21% less. However, their cropping efficiency index was 26% higher than that of trees grown on seedling rootstocks. It is concluded that self-rooted ‘Schattenmorelle’ cherry trees are more compact than trees on P. avium rootstocks and hence may be planted more densely, resulting in a higher production per unit area. Between two clones of ‘Schattenmorelle’ no differences in yield indices were found. During four years of study (1997-2000) no significant differences in fruit size were found.

Krupa T., Jadczuk E., Pietranek A., 2001. The effect of the root system type on growth and productivity of ‘Schattenmorelle’ sour cherry trees. Folia Horticulturae 13/2: 121-128.