Growth of young (three-year-old) 'Regina' sweet cherry trees grafted on nine clonal rootstocks
2008
Sitarek, M., Research Inst. of Pomology and Floriculture, Skierniewice (Poland) | Rozpara, E., Research Inst. of Pomology and Floriculture, Skierniewice (Poland)
In a field experiment, ‘Regina’ sweet cherry trees grafted on rootstocks of German selection: ‘GiSelA 5’, ‘GiSelA 3’, ‘GiSelA 6’, ‘Piku 1’, ‘Piku 3’, ‘Piku 4’, as well as those on the Italian rootstock ‘Victor’, and the Russian rootstocks ‘LC-52’ and ‘VSL 1’ were investigated. ‘Regina’ trees on ‘GiSelA 5’ were regarded as the control combination. The trees were planted in a grey-brown podzolic soil at a spacing of 4.5 x 2.5 m. The data collected in the third year after planting included tree vigour (expressed as trunk cross-sectional area), and the number and length of one-year-old shoots. The results revealed that the most dwarfing among the rootstocks tested was ‘GiSelA 3’. In terms of growth, ‘Piku 1’ reached an intermediate level between ‘GiSelA 5’ and ‘GiSelA 3’. No significant differences in trunk cross-sectional area between ‘Piku 4’, ‘Victor’, ‘LC-52’, ‘VSL 1’, ‘GiSela 6’ and ‘GiSelA 5’ were found. ‘Piku 3’ proved to be the most vigorous rootstock in this trial. The number and total length of one-year-old shoots on the sweet cherry trees were also affected by the rootstock used. The trees on ‘LC-52’ had on average 150.7 one-year-old shoots while those on ‘Victor’ only 85.2. No shoots longer than 60 cm were found on the trees grafted on ‘GiSelA 3’. Therefore, those trees had the lowest total length of one-year-old shoots. In terms of vegetative performance measured as the total length of one-year-old shoots ‘Piku 3’ was the leading rootstock.
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