对红松人工林林冠结构动态规律研究结果表明 ,红松人工林 2 5年生以前 ,单位面积的叶生物量随着林龄的增加而增加 ,2 5～ 45年生叶生物量保持较高水平 ,45年生以后开始下降。平均单株叶生物量随林分密度的增加而减少的趋势明显 ,单位面积叶生物量与地位指数呈正相关。枝生物量在 2 5年生以前随林龄的增加而增加 ,2 5年生以后呈稳定趋势 ,新生枝和枯死枝达到动态平衡 The results of dynamic study on the canopy structure of Pinus koraiensis plantations showed that the leaf biomass per unit area increased with the increase of stand ages and the leaf biomass remained high after 25 years to 45 years, After 45 years of age began to decline. The average leaf biomass per plant decreased with the increase of stand density. The leaf biomass per unit area was positively correlated with the position index. The biomass of branches increased with the increase of forest age before 25 years of birth, and stabilized after 25 years of birth, the dynamic balance of fresh branches and dead branches