Method for promoting sprout tillering and cuttage regeneration of fraxinus mandshurica through cyclic rejuvenation

The invention relates to a method for promoting sprouting and cuttage regeneration of fraxinus mandshurica through cyclic rejuvenation, and belongs to the technical field of forestry biology. In order to solve the problem of age effect bottleneck in cutting propagation, cutting survival seedlings obtained from older seedlings difficult to root are subjected to trunk cutting, rejuvenation and coppice branch cutting, and after three cycles of circular rejuvenation, the rooting rate is increased by 6.6 times, and the ear yield is increased by 2.1 times. The development state of semi-lignified sprouts with thin branches and short stem nodes formed by the stock plants through circular rejuvenation induction is provided and is most suitable for cutting rooting. According to the method, the state of the coppice shoots suitable for cuttage of fraxinus mandshurica can be determined through phenotypes, the rooting rate is greatly increased, the evaluation link is simplified, the problems of rooting propagation age effe