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A new synthesis of plant population ecology.

植物种群生态学的新综合。

基本信息

批准号：
09304073
负责人：
KIKUZAWA Kihachiro
金额：
$ 22.66万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1999
项目状态：
已结题

项目摘要

A synthetic theory was constructed which can comprehend the three well known laws and rules in plant population ecology; yield and density relationship first found by Kira et al (1953) and later formulated by Shinozaki and Kira (1956), -3/2 power rule of self thinning (1963) and size frequency distribution or MNY method proposed by Hozumi et al (1968). Kobayashi and Kikuzawa (submitting to Journal of theoretical Biology) proposed a new fundamental growth equation in which growth of a plant can be described by weight of itself, effect of surrounding plants larger than the focal plant and the effect of all surrounding plants. Integration of this equation can derive yield density relationship and integration of this equation under different critical conditions can derive Y-N relationship. Under complete one-sided competition, yield density relationship and Y-N relationship conincide completely which was already derived intuitively by Kikuzawa (1999). By incorporating an allometry between maximum tree height and tree weight and dry matter density of a stand, parametric relationship in a Y-N curve was derived. A growth equation was derived from the Y-N relation. By differentiating with time the growth equation and obtaining the weight in which growth becomes zero, the self-thinning equation was derived. This self thinning equation is more comprehensive equation involving 3/2 power law.

构建了一个能够理解植物种群生态学三大规律的综合理论；首先由Kira et al .（1953）发现，后由Shinozaki and Kira（1956）表述的屈服与密度关系，自减薄的-3/2次方法则（1963）和Hozumi et al .（1968）提出的尺寸频率分布或MNY方法。Kobayashi和Kikuzawa（提交给Journal of theoretical Biology）提出了一个新的基本生长方程，其中植物的生长可以用自身的重量、比焦点植物大的周围植物的影响和所有周围植物的影响来描述。对该方程积分可得到屈服密度关系，对不同临界条件下的该方程积分可得到Y-N关系。在完全单边竞争下，产量密度关系和Y-N关系完全吻合，Kikuzawa（1999）已经直观地推导出了这一关系。通过考虑林分最大树高、树重和干物质密度之间的异速生长关系，导出了Y-N曲线的参数关系。从Y-N关系导出了一个生长方程。通过对生长方程随时间微分，得到生长为零的权值，推导出自疏方程。这个自稀方程是一个包含3/2幂律的更全面的方程。