Method for improving cutting rooting capability of summer Chinese roses

The invention discloses a method for improving the cutting rooting capability of summer Chinese rose, which comprises the following steps: selecting current-year semi-lignified Chinese rose branches without obvious diseases and insect pests as cutting mother branches, and cutting the cutting mother branches into cutting slips; sterilizing the cutting slips; seedbed preparation, wherein a seedling raising plate is fully paved with a substrate to form a cuttage seedbed, and the substrate is soaked with water before cuttage; the cutting slips are subjected to cuttage, the cuttage depth is about 2/3 of the length of the cutting slips, and it is guaranteed that terminal buds of the cutting slips are 1-2 cm above a cuttage seedbed; performing cuttage management: performing thorough watering after cuttage; spraying a spermidine working solution and an alpha-ketoglutaric acid working solution to the cutting slips on the day of cuttage, and then spraying the spermidine working solution and the alpha-ketoglutaric acid