29年生红锥人工林经济效益分析

【目的】分析广西南宁良凤江国家森林公园29年生红锥人工林的经济效益,为红锥人工林的投资及培育提供参考依据。【方法】分别采用财务净现值、财务内部收益率、平均年利润率和平均年利税率经济评价指标,结合29年生红锥人工林林分调查和树干解析结果,分析其经济效益。【结果】29年生红锥人工林投资项目的财务净现值为739.43元/ha,财务内部收益率、年均投资利润率和年均利税率分别为12.29%、17.32%和19.62%。项目投资不确定性分析结果表明,项目抵御风险能力较弱;对项目投资影响程度排序为木材价格>木材单位出材量>投资成本。【结论】红锥人工林经济成熟年限为26年,投资发展空间较大,但应以培育大、中径材为主。

Economic benefit evaluation of 29-year-old Castanopsis hystrix plantation

Objective]The economic benefit of 29-year-old Castanopsis hystrix plantation of Guangxi Liangfengjiang National Forest was analyzed, in order to provide a scientific reference for silviculture and investment. [Method]Using the economic indicators viz., financial net present value (NPV), financial internal rate of return (FIRR), annual investment profit rate and average annual profit-tax rate, the economic benefit of C. hystrix plantation was evaluated based on stand investigation and stem analysis of 29-year-old C. hystrix plantation. [Result]The results showed that, the financial NPV of investment project was 739.43 yuan/ha, FIRR, the annual investment profit rate and the average annual profit-tax rate were 12.29%, 17.32%, 19.62%, respectively. But the project had a weak ability to resist risk. The factors affecting pro-ject investment were in order, as follow: timber price>unit output>investment cost. [Conclusion]The optimal rotation cut-ting period of C. hystrix plantation was 26 years in economy, with great investment and development capability, while C. hystrix plantation should give priority to cultivation of large-diameter and intermediate-diameter timbers.