确定最优轮伐期的原则及数学模型

最优轮伐期的确定是林学中最古老也是最重要的问题之一。本文试图探索在我国现阶段确定森林轮伐期所应遵循的原则。提出了五条,即:生产原则,经济原则,生态原则,社会原则以及系统原则。 讨论了简单情况下确定轮伐期的数学模型,即生产模型,经济模型,林租模型,净收益模型,土地期望价模型,土地租价模型以及推广了的模型。简单讨论了这些模型的性质及相互关系。以期引起对此问题的深入讨论。

ON PRINCIPLES AND MATHEMATICAL MODELS FOR DETERMINING THE OPTIMAL ROTATIONAL FELLING PERIOD OF FORESTS

Determining the optimal rotational felling period, for both natural and artificial forests, was and still is one of the most important problem in forest management. But the questions such as how to determine it, what principles to base on, or what models to use, etc. are still problems.In this paper, the author tried to explore the principles, acording to which the optimal rotational felling period can be determined. Here five basic principles-productive, economic, ecological, social and systematic-were proposed.Since the function of forest is multi-effect, not single, so generally speaking, the rotational felling period is a multiobjective programme:According to this general model, different mathematical models can be deduced from different streesed point.Finally, some simple mathematical models were discussed.