【摘要】 根据植物种群平均单株材积增长模式和最终产量恒定理论,提出一种新的植物种群密度效应机制模型:V-β=ANβ+B.这里N和V分别为林分密度和平均单株材积;A、B、β分别是随生长阶段而变化的参数.采用柳杉人工林标准地密度变化调查材料进行验证,表明该模型能很好地摸拟柳杉人工林种群密度效应规律,明显优于目前林分密度控制中最常用的密度效应倒数模型和二次效应模型,显示了较大的优越性和较高的准确性.在新的密度效应机制模型中,取β=1可得密度效应倒数模型,该模型仅为文中新模型的一个特例.更多还原

【Abstract】 According to the average individual tree volume increasing model of plant population and invariable theory of final output,we put forward a new kind of density effect mechanism model of plant population V~\{-β\}=AN~β+B. Here N means stand density and V means average individual tree volume; A, B and β are parameters that changes with growing stage respectively.Using the data of sample plots in Cryptromeria fortunei plantation to verify the new model ,the result showed that this kind of model can simulate the population density effect law of artificial C. fortunei plantation. And it is obvious that this new model is better than reciprocal model of density effect and secondary-effect model used nowadays in common .The new model is more superior and more accurate than above two kinds of models.In the new density effect mechanism model , let β=1,then we can obtain the reciprocal model of density effect, which means the reciprocal model of density effect is only a special case of this new model.更多还原