摘要
根据植物群体在自疏过程中植株高度与横径比值的变化和植株所占空间中茎枝叶分布密度变化的模式,推导出描述平均个体生物量和植株密度之间数量关系的一般模型.指出由日本生态学家 Yoda 提出的-3/2方自疏法则只适合描述特定条件下的自疏过程.通过对一般模型的分析,阐明了自疏指数赖以变化的生态学机制,并给出了自疏过程的测度方法.
According to the change modes of the height-diameter ratio,and of the dis-tribution density of stem-shoot-leaves in the space occupied by plants throughout theself-thinning process of plant population,the general model which describes the quanti-tative relationship between average per capita biomass and population density is derived.The model indicates that the—3/2 power self-thinning law which was established byYoda,a Japanese echologist,can only be applied to the particular self-thinning process.By an analysis of the model,the ecological mechanism of changes of the self-thinning in-dices is explicated.
出处
《兰州大学学报（自然科学版）》
CAS
CSCD
北大核心
1993年第4期215-218,共4页
Journal of Lanzhou University(Natural Sciences)
关键词
种群密度
种群调节
自疏法则
植物
population density
population regulation problem of competition
selfthinning law
height-diameter ratio
