Rooting agent for Castanopsis wenchangensis cutting slips, and use method thereof

The invention relates to a rooting agent for Castanopsis wenchangensis cutting slips, and a use method thereof. The rooting agent comprises naphthylacetic acid, indolebutyric acid, compound sodium nitrophenolate, 2, 4-D and deionized water, the content of naphthylacetic acid is 500-2000 mg/L, the content of indolebutyric acid is 500-2000 mg/L, the content of compound sodium nitrophenolate is 0.5-3.5 mg/L, and the content of 2, 4-D is 0.5-2.5 mg/L. The cut cutting slip base is immersed in the rooting agent for 20-40 s, then inserted into a light medium and placed on a seedbed for seedling raising; and orthogonal tests and data processing analysis show that the rooting agent plays an important role in the Castanopsis wenchangensis cutting rooting forming process, the rooting effect on cuttings is obvious when the compound sodium nitrophenolate is independently used, and the rooting effect of the cutting slips can be remarkably improved through the compound formula of the compound sodium nitrophenolate and the n