The influence of vegetative rootstocks to the first year growth shoots

The experiment was carried out in period of 2012–2013 at the ASU pomology orchard. The aim of the research was to investigate the growth dynamic of the first year 'Auksis' and 'Florina' apple - plants on rootstocks B.396, B.9, M.26, M.4, MM.106, B.118. During the vegetation period the most intensive growth of the first year plants was observed from the beginning of vegetation, to the middle of July. Growth of apple trees with different pedigree on the same rootstocks vary. Rootstocks had no influence for 'Florina' apple trees growth, except with rootstock MM.106 where apple trees were essential lower and rootstock B.118, where 'Florina' grafts diameter was essential the highest. For 'Auksis' apple trees plant growth rootstocks had more influence, than 'Florina'. Essential higher apple - trees grown on rootstock M.4 and B.118, the lowest - on rootstocks MM.106; B.396 and B.9. Essential the highest grafts diameter was with rootstocks B.118 and M.26, lowest – with rootstocks B.396 and MM.106. Leaf assimilation surface area was essential lower where 'Auksis' apple - trees grew on rootstock MM.106. Both 'Auksis' and 'Florina' leaf weight was the smallest with rootstock MM.106. while rootstock B.118 leaf weight was the biggestVytauto Didžiojo universitetasŽemės ūkio akademij