杉木竞争密度效果分析

应用生态学报 ›› 2001, Vol. ›› Issue (2): 171-174.

杉木竞争密度效果分析

薛立¹, 萩原秋男²

1. 华南农业大学林学院, 广州510642;
2. 琉球大学理学部, 日本冲绳903-0213

收稿日期:2000-08-02 修回日期:2000-10-18 出版日期:2001-03-25
通讯作者: 薛立,男,1958年生,博士,副教授,从事林分密度和自然稀疏及林木养分研究,在国内外刊物上发表论文20篇,其中5篇被SCI收录.E-mail:forxue@scau.edu.cn
基金资助:
国家教委留学归国人员基金资助项目([1999]363)

Growth analysis on the competition-density effect in Cunninghamia lanceolata stands

XUE Li¹, HAGIHARA Akio ²

1. College of Forestry, South China Agricultural Univiversity, Guangzhou 510642;
2. Laboratory of Ecology and Systematics, Faculty of Science, University of the Ryukyus, Okinawa 903 0213, Japan

Received:2000-08-02 Revised:2000-10-18 Online:2001-03-25

摘要/Abstract

摘要： 用竞争密度(CD)效果的倒数式分析了杉木的生长过程.随着时间的推移,CD曲线在双对数图上向上移动.随着物理时间t的增加,生物时间τ(τ被定义为逻辑斯蒂生长曲线中生长系数λ(t)的积分)倾向于增加到最大值.CD效果倒数式中的系数A和B被求出.随着生物时间τ的增加,系数A急剧增加到最大值后下降,倾向于稳定在一个常数,而系数B呈指数下降,倾向于接近零.随着林分的生长,生长系数λ(t)倾向于下降.

Abstract: The competition density (C D) effect in Cunninghamia lanceolata stands was analyzed by using the reciprocal equation 1/ w=Aρ+B, where w and ρ represent mean stem volume and density,respectively,the C D curve given by the reciprocal equation on logarithmic coordinates shifted upward with time.With the increase of physical time t the biological time τ defined as the integral of λ(t) ,the growth coefficient in general logistic growth curve,tended to increase to the maximum.The coefficients A and B included in the reciprocal equation were calculated at each growth stage. With increasing τ, the coefficient A increased abruptly up to a maximum value,and then tended to decrease gradually to a constant level, whereas the coefficient B decreased exponentially,and tended to close to zero. The coefficient of growth λ(t) decreased with increasing stand age.

中图分类号:

S718.54

薛立, 萩原秋男. 杉木竞争密度效果分析[J]. 应用生态学报, 2001, (2): 171-174.

XUE Li, HAGIHARA Akio . Growth analysis on the competition-density effect in Cunninghamia lanceolata stands[J]. Chinese Journal of Applied Ecology, 2001, (2): 171-174.

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