Abstract
The authors studied the relationship between stand structure before cutting of the forest and species composition established their after C. japonica was planted. The main dominant species by relative density before cutting were C. japonica on the lower part, Betula maximowitchiana and C. japonica on the middle part and Fagus crenata on the upper part of the slope. The dominant species in the juvenile C. japonica plantation were B. maximowitchiana, B. grosa and Magnolia obovata, etc. throughout the entire slope, however, F. crenata and Quercus crispla decreased on the upper part of the slope. Q. crispla seedlings sprouted the most in the time of clear cutting, B. maximowitchiana, M. obovata germinated the most in the next year of planting, which was two years after the cutting. Q. crispla is established by the seedlings already growing before the cutting or the seeds which have fallen to the ground just before cutting. B. maximowitchiana, M. obovata are established from seeds which have germinated because of disturbed soil conditions caused by site preparation and planting. It is clear that the hardwoods established on the plantation are the species in which the seeds are dispersed widely by wind or birds, and can be buried viably and also their germination is prompted by disturbances of the soil surface such as clear cutting, site preparation and planting.
