Grafting Experiment of Fruit Forest of Pinus koraiensis

Three-year-old Pinus koraiensis seedlings 4-year-old Pinus sylvestris container seedlings were used as rootstocks.Superior forest trees of 17-year-old Pinus koraiensis plantation in growth characters in Dongjingcheng of Mudanjiang were selected.The lateral branches on top in middle part of crown were grafted by pith-cambium grafting with scion.Result shows that graft ratio are all above 70%,scion current increment of Pinus sylvestris rootstocks are higher than that of Pinus koraiensis rootstocks.