Out-of-tube rooting method for tissue culture seedlings of silver birch

The invention discloses an out-of-tube rooting method for tissue culture seedlings of silver birch. The out-of-tube rooting method comprises the following seven steps: establishing an axenic culture medium; culturing the tissue culture seedlings; acclimatizing rootless vitro seedlings; transplanting; managing after transplanting, and the like. According to the method provided by the invention, the current situation of low vitro rooting percentage of the silver birch is solved, the vitro rooting link is simplified, the survival rate of transplanting is increased and the growing condition is excellent, so that the culturing time of tissue culture seedlings is shortened, the seedling multiplying speed is increased, the culturing space is reduced, the production link is simplified and the production cost is saved. The reliable technical guarantee is supplied to the industrialized production according to the out-of-tube rooting method for the tissue culture seedlings of the silver birch provided by the invention.