油松植物种群自疏规律模型的研究

根据植物生长的密度理论和有关生物学假设，推导出一种新的植物各自疏规律模型，即Ｎ＝ｅｘｐ（ａｌｎ＾２Ｂ＋ｂｌｎＢ＋ｃ），这里Ｎ和Ｂ分别为种群密度和植物种群平均重量或平均胸高断面积，ａ，ｂ，ｃ为参数。将该模型应用于油松种群密度变化规律研究中，证明该模型能很好地拟合实际的观测资料，并且具有表达式简单等特点，因而，该模型是油松植物种群自疏规律的有效描述。

STUDY ON MODEL OF SELF THINNING LAW OF PINUS TABULAEFORMIS POPULATION

Based on the density theory of plant growth and related biological hypothesis,a new model of self thinning law of plant population was proposed,i.e. N =exp( a ln 2 B b ln B c ),where N and B is population density and weight mean plant or mean basal area at DBH and a,b and c are parameters.It was proved that the model fitted observed data very well from Pinus tabulaeformis population,and which was very simple.Therefor,the model is a satisfactory expression of self thinning law of plant po pulation .