摘要
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 basis,stand growth and harvest forecast and self-thinning model were established for Larix kaempferi pulp plantation.Natural growth table of forest for different density were also built.The technical maturity of the plantation was determined according to physical property of wood,fibre form,chemical components,and pulp characters.Economic maturity of the plantation was also calculated by cost-benefit analysis.Proper rotation of Larix kaempferi pulp plantation over middle site class in Eastern Liaoning was 16～18a,and the increment of inter benefit could be 3.8%～14.1%.
出处
《辽宁林业科技》
2001年第1期11-14,共4页
Liaoning Forestry Science and Technology
