sodininkystė ir daržininkystė 25(4)

and P 59 rootstocks. This confirmed previous findings of Kruczyñska and Czynczyk
(1998a), Lipecki (1994), Kurlus and Ugolik (1994) and Gruca (2001).
Table 3. Flowering abundance (scale 0-5) of ‘Jonica’ trees as influenced by
different rootstocks and year of study
3 lentelë. ’Jonica‘ veislës vaismedþiø þydëjimo gausos (0–5 skalë) priklausomumas
nuo poskiepiø ir tyrimo metø
Treatment
Veislës ir
poskiepio derinys
Flowering abundance (scale 0-5)
Þydëjimo gausa (0–5 skalë)
1999 2000 2001 2002
Mean for
treatment
Veislës ir poskiepio
derinio vidurkis
‘Jonica’/M.9 4.15 ab 3.60 a 3.25 bc 2.20 a 3.30 ab
‘Jonica’/P 60 4.05 ab 4.30 a 2.60 ab 2.97 a b 3.48 b
‘Jonica’/M.26 3.85 a 4.35 b 2.00 a 1.95 a 3.03 a
‘Jonica’/P 22 4.80 b 4.20 a 3.40 c 3.66 b 4.01 c
‘Jonica’/P 59 4.50 ab 3.87 a 3.30 bc 2.55 a 3.55 b
4.24 b 4.06 b 2.88 a 2.61 a
Table 4. Fruit set of ‘Jonica’ trees as influenced by different rootstocks
and year of study
4 lentelë. ‘Jonica’ veislës vaismedþiø vaisiø uþuomazgø priklausomumas
nuo poskiepiø ir tyrimo metø
Treatment
Veislës ir
poskiepio derinys
Fruit set
Vaisiø uþuomazgos, %
1999 2000 2001 2002
Mean for treatment
Veislës ir poskiepio
derinio vidurkis
‘Jonica’/M.9 8.17 ab 1.60 a 12.7 a 18.6 a 10.26 a
‘Jonica’/P 60 7.47 a 1.27 a 13.2 a 14.9 a 9.21 a
‘Jonica’/M.26 9.00 ab 2.45 a 17.45 a 15.32 a 11.05 a
‘Jonica’/P 22 7.80 ab 5.60 b 15.72 a 20.93 a 12.51 a
‘Jonica’/P 59 9.42 b 1.55 a 15.00 a 13.70 a 9.91 a
8.37 b 2.49 a 14.81 c 16.69 c
Wagenmakers (1994) stated that too strong growth causes poorer light perception,
and consequently decreases flowering intensity. Some authors (Brown et
al., 1985; Bauger et al., 1994; Stutte et al., 1994) pointed out rootstock, which
significantly influences this feature. This experiment also proved it. The highest
flowering abundance in comparison to rootstock M.9 was observed for P 22,
followed by P 59, P 60 and M.26. Rootstocks did not affect the fruit set (Table 4),
however, big differences between seasons regarding this feature were recorded.
The highest fruit set was noted in 2001 and 2002 (14.8% and 16.7%, respectively),
the highest yielding for these years was obtained. Though in some years of the
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