广义法正林理论的应用研究

A Study on Using the Theory of Generalized Normal Forest

应用5种不同的减反率估计方法,对湖南省江华瑶族自治县集体林区过去5年杉木采伐量进行研究,认为在我国南方集体林区,可以用减反率法来预估木材的产量。用广义法正林状态为规划目标,考虑减反率约束的线性规划方法,在不确定规划期间动态优化的情况下进行规划。其规划期间内的总采伐量与相同时间内用减反率法预估的采伐量总和相差不大,而对龄级结构的调整则明显强于减反率法模拟的结果。这样的线性规划在实际中具有指导意义,其结果可为确定限额采伐量、调整龄级结构提供科学依据。

Using five different Gentan probability methods,this paper studied the past five years' cut of Chinese Fir (Cunninghamia lanceolata) on the collectively owned forest in Jianhua county,Hunan province.In this paper,a linear programming with the goal of generalizing the Normal Forest State and the constraints of Gentan probability were used for programming under the conditions of the infinitive programming periods dynamic optimum.The total cut of the programming period differs very little from the predicted cut of the Gentan probability,and the regulated age-class of the forest is better than that of the Gentan probability.Also considered was that linear programming has the meanning of practical guidance,and the result can provide a scientific base for the decisions of standard cutting and regulation of a forest state.Finally,the prediction and feasibility of the Gentan probability method was discussed.