对浙江省“国家造林项目”杉木、马尾松、火炬松 3个主要树种的造林成本、产出效益、外汇风险、偿还能力等进行了较为详细的技术分析 ,结果表明 ,确保有效的资金投入、采用先进的技术和管理措施是项目成功的根本保证。根据调查计算 ,单位蓄积超过部颁标准为 :4～ 7年生杉木 12 1.3%～ 2 5 8.7% ,5～ 7年生马尾松 142 .5 %～710 .7% ,6年生火炬松 31.3% ,预测造林后第 2 0年采伐时 ,可产生经济效益 :杉木 6 35 89元 /hm2 ,马尾松 46 5 2 4元 /hm2 ,火炬松 5 772 6元 /hm2 。综合计算出本项目净现值NPV =5 835 0 .85万元 ,内部收益率IRR =2 4.70 % ,经济效益十分显著 A detailed technical analysis of the afforestation cost, output benefit, foreign exchange risk and repayment ability of the three major tree species of Chinese fir plantation, Pinus massoniana and Pinus taeda in Zhejiang Province was carried out. The results showed that ensuring the effective capital investment, The use of advanced technology and management practices is the fundamental guarantee of project success. According to the investigation and calculation, the unit reserves exceed the ministerial standards: 12.3% ~ 25.7% of 4-7 year-old Chinese fir, 142.5% -710.7% of 5-7 year-old masson pine and 31.3% of 6-year-old Pinus taeda, Economic benefits were obtained when harvesting was done 20 years after afforestation: Chinese fir 6 35 89 yuan / hm2, massoniana 46 524 yuan / hm2, and loblolly pine 5772 6 yuan / hm2. The NPV of this project is calculated to be 5835808 thousand Yuan, the internal rate of return IRR is 2. 4.70%, and the economic benefit is very significant