关键词: 最优采伐周期, 代际公平, 生态林收购, 林木补偿, 林业补助

Abstract:

This paper firstly extends the single period optimal harvest decision model for the forest to infinite periods, so as to indicate that how to decide the optimal rotation length which can maximize the forest's revenue in all directions when repeat planting and harvesting trees on the same plot of earth till infinite future. The study also analyses the influence of discounting rate, timber price, harvesting cost, planting cost, and tax to the decision of optimal rotation length. As well as when we introduce the factors of continuously rising timber price and the ecological revenue of the forest, how the optimal rotation length will change. Secondly, the authors introduce the intergenerational equity principle into above model, giving a research on a resource exploiting manner which satisfies both the dynamic efficiency principle and the intergenerational equity principle. Last but not least, the research applies the above model to the analysis of Chinese forestry economic policy, and explains the economic theory of institutions such as government purchasing ecological forest, tree compensation and forestry subsidization, which provides necessary theoretical foundation for future application of these new institutions. From the authors' point of view, the government may consider to encouraging private capital investing in the ecological forest construction by purchasing their forest in a reasonable price, or, compensating or subsidizing the operators certain amount of money, so as to improve their engagement in operating the ecological forest and thus increase the supply of forest ecological product, creating necessary condition for the balanced development of economy, ecological environment and society.

Key words: optimal rotation length, intergenerational equity, ecological forest purchase, tree compensation, forestry subsidization