长白落叶松工业用材林经营模拟研究

通过对长白落叶松不同立地等级和经营密度的林分进行经营模拟研究发现：在即时间伐的情况下，木材径级与初始造林密度没有相关关系，与立地等级关系极为显著，低密度经营措施不能有效增加木材径级；问伐和主伐收获总量随着密度的增加，增幅差异不明显；如果考虑营林投资的时间成本价值。长白落叶松人工用材林的培育周期不应超过60年。

Simulating Management of Industry Plantation of Larix olgensis

Based on simulating management of diffident site grade and density of Larix olgensis wood stands,some conclusions was made:wood diameter has notable relativity with site grade but has no relativity with original plant density,low density measure cannot add wood diameter;the gross of thinning and main cutting add with increasing of orignal plant density,but breadth of increasing is not notable; if thinking of cost price of investment time ,Larix onlgensis wood stands should be cut in 60 year.