一种描述植物种群自然稀疏过程的经验模型*

林业科学 ›› 1995, Vol. 31 ›› Issue (3): 247-253.

一种描述植物种群自然稀疏过程的经验模型^*

方精云

中国科学院生态环境研究中心, 北京 100085

收稿日期:1994-01-31 出版日期:1995-05-25 发布日期:1995-05-25

AN EMPIRICAL MODEL DESCRIBING NATURAL THINNING PROCESS OF PLANT POPULATION

Jingyun Fang

Research Center for Eco-Environmental Science, Academia Sinica Beijing 100085

Received:1994-01-31 Online:1995-05-25 Published:1995-05-25

摘要/Abstract

摘要：

根据植物生长的密度理论和有关生物学假设, 提出了一种新的植物种群自然稀疏的经验模型, 即1/ρ=α(lnω-lnω₀)^β+1/ρ₀。这里ρ和ω分别为种群密度和平均植物重, ρ₀和ω₀为初期密度和初期植物重, α和β为参数。经用木本和草本植物种群的密度试验资料验证, 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的特点。因而具有良好的使用价值。对模型的性质和意义也作了讨论, 发现模型所表达的植物生长过程是一种Gompertz曲线。

关键词: 经验模型, 植物重, 种群密度, 自然稀疏

Abstract:

Based on the density theory of plant growth and related biological hypotheses, the author proposed a new empirical model describing the natural thinning process in an even-ages plant population, i. e. 1/ρ=α(lnω-lnω₀)^β+1/ρ₀ where ρ and ω is population density and weight mean plant, ρ₀ and ω₀ is the initial population density and initial plant weight reapectively, and α and β are parameters. it is proved that the model fits observed data from woody and herby plant density/growth experiments very well, and which is very simple. Therefore it is very useful in practice. Discussing the features and meaning of the model, it is found that the growth process of plants shown in the model is a kind of the Gompertz Curve.

Key words: Empirical model, Plant weight, Population density, Natural thinning

方精云. 一种描述植物种群自然稀疏过程的经验模型^*[J]. 林业科学, 1995, 31(3): 247-253.

Jingyun Fang. AN EMPIRICAL MODEL DESCRIBING NATURAL THINNING PROCESS OF PLANT POPULATION[J]. Scientia Silvae Sinicae, 1995, 31(3): 247-253.

图/表 6

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参考文献 14

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2	方精云, 山倉拓夫, 菅誠。日本落叶松模拟种群的生长与密度的关系. 植物学报, 1991, 33 (12): 949- 957
3
4	Happen , J L . Population biology of plants. London: Academic Press, 1977
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6	Hozumi K . Ecological and methematical considerations on self-thinning in ever-aged pure stands 1, Mean plant weight-density trajectory during the course of self-thinning. Bot. Mag. Tokyo, 1977, 90: 165- 179 doi: 10.1007/BF02488355
7	Hozumi K . Ecological and methematical considerations on self-thinning in ever-aged pure stands III, Effect of the linear growth factor on self-thinning. Bot.Mag.Tokyo, 1983, 96: 171- 191 doi: 10.1007/BF02498999
8	Hutchings M L . Ecology's law in search of a theory. New Scientist, 1983, 98: 765- 767
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10	Spurr S H et al . Nine successive thinnings in a Michigan white pine glantatin. J For, 1957, 55: 7- 13
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