建立火炬松纸浆材和建筑材人工林生长模型、结构模型、经营模型和材种出材量模型 ,对火炬松主要营林技术措施进行优化组合 ,形成特定的若干类型的栽培模式 ,以净现值和内部收益率为控制指标对各种组合 (即栽培模式 )进行经济评价 ,进而提出了内部收益率达 19%以上的最优栽培模式 To establish the growth model, structural model, management model and the timber production model of Pinus taeda plantation wood pulp and building materials, optimize the main technical measures for forestation of Pinus taeda to form some specific types of cultivation modes, Value and internal rate of return for the control indicators of various combinations (ie, cultivation mode) for economic evaluation, and then put forward the internal rate of return of 19% or more of the optimal cultivation mode