The present invention relates to a culture medium for promoting the purification of apple dwarfed tree 'M9' seedlings cultured in-flight in a hydroponic cultivation system and a method for purifying the same, more specifically, a culture medium according to the step of purifying to promote the growth of apple dwarfed tree The invention relates to a purification method using an appropriate concentration of minerals, and an appropriate temperature and luminous conditions for cultivation. The culture medium for promoting the purification of the in-flight apple dwarf sapling 'M9' seedlings according to the present invention is similar to the cation and anion ratio of the apple seedling, and in the culture method using the same, According to the purification step, growth can be promoted by appropriate concentration, temperature, and light intensity of the medium, and further, by promoting the growth of the underground, the growth of M9, which is important for root growth, can be improved.
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