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采用Richards生长模型为日本落叶松人工林生长的基本模型 ,建立了整体生长和收获预估模型、林分自然稀疏模型 ,研制了不同造林密度的日本落叶松人工林自然生长过程表。通过不同林龄木材物理性能和纤维形态、化学分析及纸浆造纸性能确定工艺成熟龄。贴现率采用 12 % ,以内部收益率、收入与成本比、土地期望值最大确定经济成熟龄。对辽东地区日本落叶松纸浆林合理轮伐期进行了系统研究 ,确定日本落叶松纸浆林中等立地以上合理轮伐期为 16～ 18a ,内部收益率可提高 3.8%～ 14.1% ,达到 15.8%～ 2 6 .1%。
Using Richards growth model as the basic model for the growth of Japanese larch plantation, the overall growth and harvest prediction model and natural sparse stand model were established. The natural growth process of Larix kaempferi plantation with different planting densities was developed. Through the different ages of wood physical properties and fiber morphology, chemical analysis and pulp papermaking process to determine process maturity. The discount rate of 12%, with the internal rate of return, income and cost than the maximum expected value of the land to determine the economic maturation age. The reasonable rotation period of Larix kaempferi pulp plantation in Liaodong area was systematically studied. The reasonable rotation period of Larix kaempferi plantation was 16 ~ 18a, and the internal rate of return increased by 3.8% -14.1% to 15.8% 2 6 .1%.