人工林栽培最优密度决策经济分析

THE ECONOMIC ANALYSES ON OPTIMAL DENSITY OF PLANTATION

以土地生产率与劳动生产率之间的平衡为基本原则,对人工林栽培最优密度决策进行经济分析。运用密度—收益关系曲线、树木价格—规格关系曲线、折现率—轮伐期—收益关系,以及各种对比分析等方法,研究成本、折现率、价格等经济因素对初植密度、间伐次数与强度、间伐方式、间伐时间等密度决策的作用与影响规律。进而分析初植密度、间伐密度与轮伐期之间的关系。引入低密度种植、少次数与弱度间伐、延长间伐、上层间伐等带有经济色彩的密度决策概念,从而得出密度决策分析结果。

On the basis of the balance between land productivity and labour product- ivity,this paper applied economic analyses into optimal spacing and thinning decision of plantation forestry.Having studied the relationship between spacing and revenue, between tree price and size,among discount rate,rotation and revenue,and other analytic methods,this paper has found that cost,discount rate and price had a great influence upon spon spacing,thinning frequency,intensity,type and time.Then, this paper analyses the interaction of spacing,thinning and rotation length,introd- uces concepts of density decisions which related to economics,such as wide spacing, thinning with light frequency and intensity,delayed thinning,upper-class thinning and so on.Finally,it obtained results of density decision analyses.