林带连续性经济效益模型及其应用的研究

STUDIES ON THE MODEL AND ITS APPLICATION FOR CONTINUATIVE ECONOMIC BENEFITS OF WINDBREAK MANAGEMENT

通过对农田防护林经营问题的深入系统的探讨，以阐明农田防护林考虑时空动态特征的连续性的经济效益为目标，在建立主要决定因素包括林带结构—疏透度变化规律，林带结构对防护效益影响，灾害因子参数确定及成林高等各相关子模型的基础上，构筑了农田防护林经营经济效益总模型，并以观测的杨树林带试验数据为例，确定了模型中主要子模型的参数变量，从而为农田防护林的经营、规划设计等提供了可靠保障。

Through the studies on the shelterbelt management, sub models of shelterbelt management including windbreak structure(optimal porosity β ), relationship between porosity and protective benefit( β 0), coefficient of disaster( α ), mature height( H in ) and effective interval of protection( D ef )etc. were established successfully. Based on the sub-models, the model for continuative economic benefits of windbreak management(CEBWM) was obtained. The parameters and application examples of poplar shelterbelt were also given in this paper. The CEBWM can provide not only technologies for windbreak management, but also important parameters for windbreak planning and designing.