The invention relates to the technical field of
malus spectabilis
seedling cultivation, in particular to a
greenhouse container
seedling cultivation method for improving the ornamental value of North American
malus spectabilis. Comprising the following steps: selecting an air-permeable root control container, and preparing a special culture medium; the robust seedlings are planted in a root control container, and the container is placed in a shading environment for
seedling recovery; controlling day and night temperature, illumination and water nutrients; a water and
fertilizer integrated
system is adopted for
irrigation and fertilization; physical methods of pinching,
branch pulling and
girdling are applied, and
paclobutrazol is sprayed on leaf surfaces; through precise regulation and control day and night
temperature difference and photoperiod management,
coupling application of water and
fertilizer integration and synergistic
drought stress and organic combination of physical shaping and
chemical regulation and control, a synergistic interaction effect is generated among factors such as temperature, illumination,
moisture and nutrients; therefore, the beneficial effects of inhibiting spindling, promoting branching, efficiently inducing flower
bud differentiation and shaping compact
plant types are synchronously achieved on the whole, and the ornamental quality and growth consistency of the North American
malus spectabilis container seedlings are improved.