Abstrakt
In 1999–2001 years two Rosa × hybrida cultivars, ‘Casanova’ and ‘Korlingo’, were obtained by bud-grafting on a thornless multiflora rootstock (Rosa multiflora Thunb.). The first factor studied was the rootstock quality: class I (base diameter Ø = 4–6 mm); class II (Ø = 3–4 mm); class III (Ø = 2–3 mm). The second factor studied was the scion size: thick scions (Ø = 6–8 mm); medium scions (Ø = 4–6 mm); thin scions (Ø = 2–4 mm). Plant mass of Rosa × hybrida shrubs was greater with class I than with class II or class III rootstocks. The shrubs obtained by bud-grafting on class I and class II rootstocks were higher than with III class rootstocks. Rose shrubs of greater height and mass were obtained by bud-grafting with medium scions, and shrubs of lowest height and mass were obtained with thin scions. The number of primary shoots was not significantly affected by either rootstock quality or scion size. Plant mass and plant height were greater in ‘Casanova’ than in ‘Korlingo’.
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