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研究了河北省太行山刺槐种群乔木层生物量、各组分量及种群密度的动态规律。结果表明，刺槐种群自人工造林伊始，其种群总生物量、各组分量、种群密度（断面积表示）即表现出速增性，约至１２ａ生达到峰值，基本符合Ｌｏｇｉｓｔｉｃ规律。此后随个体间竞争的加剧，自疏作用加强，种群呈不稳定状态，种群密度和生物量下降，由一个同龄纯林逐渐趋向于具有多代个体年龄结构稳定的群体，并使种群生物量回复到一个相对稳定水平。本文还建立了生物量及各组分量与种群年龄、密度的相关模型，及Ｗ～ｆ（Ａ，Ｇ，Ｈ）多元线性回归议程。
The dynamic laws of biomass, composition and population density of arbor layer in the Taihang Mountains of Hebei Province were studied. The results showed that the population of Robinia pseudoacacia increased rapidly from the beginning of artificial afforestation. The biomass, components and population density of R. pseudoacacia increased rapidly from about 12 to 12 years old, which accorded with Logistic rule. From then on, with the intensification of competition among individuals, strengthening of self-sparseness, the population was unstable, population density and biomass decreased. From a pure forest of the same age, it gradually tended to have a stable population structure with multiple generations of individuals and the population biomass recovery To a relatively stable level. In this paper, we also established the correlation models between biomass and its components, population age and density, and W ~ f (A, G, H) multiple linear regression.