Method for promoting growth of taproots of panax notoginseng and inhibiting growth of fibrous roots of panax notoginseng

The invention discloses a method for promoting growth of taproots of panax notoginseng and inhibiting growth of fibrous roots of the panax notoginseng, and belongs to the technical field of modern Chinese herbal medicine cultivation. The method comprises the following main operation steps: in the late growth period of the three-year-old panax notoginseng, that is, 35 days to 45 days before the panax notoginseng is dug, only a nitrogen fertilizer (ammonium bicarbonate with a nitrogen content of 17.1% or more) is applied at last fertilization. According to the method disclosed by the invention,through application of the nitrogen fertilizer, the growth of the fibrous roots is inhibited, shrinkage of the fibrous roots is stimulated, accumulated substances are transferred to the taproots of the panax notoginseng, weight gain of the taproots of the panax notoginseng is promoted, a weight of a single root tuber of the panax notoginseng is increased, and therefore market economic benefits ofthe panax notoginseng are