Effects of Pre-Hardening and Autumn Fertilization on Biomass Allocation and Root Morphology of Pinus koraiensis Seedlings

The effects of pre-hardening fertilization and autumn on seedling growth have been studied separately, but studies their combined are relatively scarce. We the type level biomass allocation root morphology container-grown seedlings Korean pine (Pinus koraiensis Sieb. et Zucc.), a valuable evergreen conifer distributed from Changbai Mountain to Xiaoxing’an Mountains in northeastern China. Three types (conventional fertilization, exponential controlled-release fertilizer) were all applied with 72 mg nitrogen. also four nitrogen levels fertilization: 0 mg/plant, 2 4 6 mg/plant. found that increased accumulation by 65.91%–92.15% 108.86%–141.48%, respectively. There was significant interaction between morphology. Seedlings conventional during growing season best response particularly mg/seedling treatments. Autumn can be cultivation high-quality seedlings.