Method for promoting rooting of eucalyptus seedlings by using mikania micrantha water extract

According to the method for promoting rooting of the eucalyptus seedlings through the mikania micrantha water extract, the mikania micrantha water extract with the concentration of 5 g/L is provided for promoting root growth of the eucalyptus seedlings, the root surface area and the average root diameter of the eucalyptus seedlings can be increased, and the total root length can be increased. The preparation of the mikania micrantha water extract comprises the following steps: taking fresh mikania micrantha branches and leaves, drying at 70 DEG C to constant weight, crushing, sieving with a 2mm sieve, and fixing the volume with pure water; and putting the volumetric flask with the constant volume into a shaking table, shaking for 24 hours, fully mixing and dissolving, and filtering to obtain the mikania micrantha water extract with the concentration of 5g/L. The mikania micrantha is rich in raw material, only water is added, and the preparation method is simple, safe, reliable and free of environmental pollut