摘要
提出有限的空间种群增长的 L ogistic改进模型探讨格氏栲种群基面积增长规律 ,即 d S/dt=r S(1- Sθ/K )。该模型通过树种的竞争特性因子θ控制 ,将指数增长、线性制约、下凹增长和上凸增长非线性制约概括一个统一的自适应性的非线性制约通用模型。运用改进单纯形对 L ogistic改进模型进行优化 ,拟合结果表明改进模型是格氏栲种群优势度增长动态变化的一个极好机理描述式 ,其增长速度最大是在
A modified Logistic model (MLM: dS/dt=rS(1-S θ/K)) which has self-adaptive properties, a nonlinear restrictive model and a general mechanism model were constructed to test growth dynamics of tree basal area of Castanopsis kawakamii population. Exponential, Linear dependent and nonlinear restrictive models of hollow and protruding growth volumes were also constructed and incorporated in to the competitive index. A modified simplex technique was used to optimize the MLM and the fitting results show that the MLM did model the Castanopsis kawakamii dominance growth dynamics well. The maximum growth rate of basal area in the modelled population was reached at 140 years.
出处
《植物生态学报》
CAS
CSCD
北大核心
2001年第2期225-229,共5页
Chinese Journal of Plant Ecology
基金
福建省教委科学基金资助项目 !(K2 0 0 43)
