Abstract:
There were studied several scion cultivars in the nursery regarding
natural tendency of feathering at Fruit Research and Development Station
Bistrita in 2015. The goal of the study was to assess the natural behavior of
forming preformed shoots of several scion-rootstock combinations in the first
year after grafting. Several researches showed that not only grafted scion has a
direct effect on the sylleptic branching of fruit trees and feathering but also the
rootstock has an important influence. The studied scion-rootstock combination
were: Florina/M106, Florina/M26, Ionathan/M106, Ionathan/M26. Results
indicate that the hypothesis that not only the cultivar but also the rootstock
influences the emergence of the feathers is confirmed, medium to strong vigor
rootstock M106 induces feathering on Florina cultivar naturally (average
number of 3.13 shoots), probable the more complex and dense root system
provides sufficient nutrients in order to promote lateral branching. Medium
feathering was observed also at Starkprim cultivar on M106 rootstock (2,8
shoots), not included in the statistical analysis but observed in singular
combination, showed high sylleptic shoot formation. Even more sylleptic shoots
were formed in the vigorous combination of Auriu de Bistrita cultivar on M106
(3,8 shoots) also not included in the analysis in this experimental phase. Based
on these results in further researches using agro-technical methods like
pinching in optimum time intervals , foliar fertilizing and other techniques we
will study and develop good feathered trees with more lateral shoots and strong
root system in order to provide quality planting material for farmers.
