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.