ISHS Acta Horticulturae 557: VII International Symposium on Orchard and Plantation Systems
TESTING NEW DWARFING APPLE ROOTSTOCKS FROM POLISH AND FOREIGN BREEDING PROGRAMMES |
| Authors: | A. Czynczyk, P. Bielicki, B. Bartosiewicz |
| Abstract:
An experiment carried out over 9 years (1991-1999) showed that trees of Cortland, Gloster and Lobo grafted on P 14 were similar or slightly smaller than trees on M.26. Trees grafted on MARK, 62-396, P 2 and on sub-clones of M. 9; (T.337, T.339, Pajam 1 and Pajam 2) were similar in size to the trees grown on M. 9 EMLA. All three cultivars grown on YP rootstocks were the largest whereas on: P 59, B 9, P 22 and Jork 9 were the smallest. The highest index of cropping efficiency (expressed as kg of fruit per cm2 trunk cross area) for Cortland was shown on P 59, B 9 and T.337, compared to Gloster trees on P 22, Jork 9 and Pajam 2 and Lobo trees on MARK and 62-396. Among the rootstocks tested the most suitable for Polish conditions on light soils are P 14, M.26 and P 60. For fertile soils recommended dwarf rootstocks are M. 9 EMLA and M.9 sub-clones, P 59 and P 22. Keywords: Apples, dwarfing, rootstock, M.9 sub-clones | |
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