Effect of planting density on growth of hybrid larch (Larix olgansis×Larix leptolepis)

Four planting densities of hybrid larch(Larix olgansis×Larix leptolepis) were designed under the same site conditions for determining the effect of planting density on growth of the hybrid larch.The result shows that the planting density has significant effect on average diameter at breast height and single-tree volume;however,no significant effect were observed on the average height of stand and volume per hectare.In consideration of the survival rate,preserving rate and cost of planting,a planting density of 4 400·hm-2 is recommended as the optimum density for planting the hybrid larch.