The invention belongs to the technical field of
fruit tree seedling cultivation, and particularly relates to an apple dwarf
rootstock seedling strengthening and branching promoting method. The method comprises the following steps: S1, digging dwarf
rootstock seedlings from a nursery garden and refrigerating the dwarf
rootstock seedlings; s2, the dwarfed rootstock seedlings are taken out and
cut back to obtain rootstocks, the scions are grafted to the rootstocks, and grafted seedlings are obtained; s3,
grafting seedlings are planted in the middle ten days of March; s4, when buds of the scions of the grafted seedlings germinate to exceed 6 cm, all new branches of the rootstock are removed, and when new shoots at the topmost ends of the scions grow to 15-20 cm, only the new shoots are reserved, and the vertical rods are stable; s5, when the distance between the tops of the new shoots and the ground exceeds 70 cm, a branching promoting agent is sprayed to the tops of the new shoots, and the branching promoting agent is formed by compounding a 50-60-fold solution of benzylamino
gibberellic acid and a 50-60-fold solution of
thidiazuron according to the equal volume ratio. According to the method, the branching amount and the branching length of the seedlings can be remarkably increased, and an
effective solution is provided for solving the problems that single-
trunk apple seedlings are slow in crown forming, late in fruiting and low in yield.