Testing of apple rootstock-scion combinations in various orchard systems

In the autumn of 2001, a trial apple orchard was planted with two cultivars ’Jonathan Csany 1’ and ’Sampion’ to compare 2 training systems (slender spindle and vertical axis), 8 rootstocks (M.9 T.337, M.9 Burgmer 984, Jork 9, B9, M.26, MM.106, MM.111 and B118), and 8 planting densities (3.6-4.5 x 0.75-1.75 m). For the proper development of trees a trellis system was constructed, and for irrigation micro-sprinklers wre installed. The objective of this trial was to select the best new, promising rootstocks – not yet used in Hungary – the most suitable for the natural conditions of N.E. Hungary. Also the study was to determine the influence of each rootstock and training system on the performance of trees. In the first three years after planting, growth of the cultivars on various rootstocks is presented.