河北省承德地区防护林体系林种结构的最佳模式

A Best Pattern of Forest Constitution for the Protection Forest System of Chengde Region,Hebei Province

本文用线性规划方法,把以防护效益为主并满足社会需求作为约束条件,使防护林工程的费用最小作为目标,计算出了河北省承德地区防护林体系林种结构的61个方案。对不同情况,如资金不足、取得较好的经济效益、解决木材供需矛盾以及其它条件的变化等等,可以从61个方案中选出一个最佳方案。

61 schemes of forest constitution for the protection forest system of Chengde Region,Hebei Province, were calculated by the linear programming in which the protection benifit and the meeting of social demands are restrictive conditions, and minimizing engineering cost of protection forest is objective function. To the various conditions, such as the lack of funds, achieving better economic benifit, solving the contradiction between timber demand and supply, and the changing of other conditions etc, a best scheme can be selected from 61 schemes.