摘要
对大头茶纯林构件种群的生物量和叶面积动态研究表明：各构件种群生物量和叶面积动态都可用ｌｏｇｉｓｔｉｃ方程描述。但各具特殊性。（１）叶生物量和叶面积动态用幂函数方程和ｌｏｇｉｓｔｉｃ方程都可较好地拟合，图呈平放的倒“Ｓ”形；（２）根、叶、枝、芽生物量及叶面积的增长在停滞以后又会随条件变化重新开始，直至停滞。可能为螺旋形的ｌｏｇｉｓｔｉｃ增长，与个体和茎生物量增长传统的“Ｓ”形曲线不同；（３）枝和茎生物量内禀增长率较大，占总体比率持续上升：根所占比率基本保持不变：叶和芽内禀增长率较小，占总体比率不断下降。叶的下降与枝、茎的上升之间呈二元线性相关（ｐ＜００１）。表明植物体对各构件生物量投资的不均衡性，重点偏斜于枝。
The modular population dynamics and leaf area dynamics in Gordonia acuminata in Mt.Jinyun were studied.They were both expressed by the logistic equation.But there were particularities at different level:(1) The dynamics of leaf biomass and leaf area were similar.They could be well fitted by power function and logistic equation.Their figures looked like flatted and upside down Sshape.(2) Biomass of roots,leaves,branches and buds began to increase again after a cease period of growth.Perhaps they were a spirally logistic increase,differing from traditional logistic curve.(3) In the process of the stand development,the innate increasing rates of branch and stem were very high,the ratio of branch and stem biomass to the tota biomass continued to go up ,accounting for 0%～11% and 19%～66% respectively.The corresponding ratio for roots was constantly around 22%,while innate increasing rate of the leaves and buds was smaller and the ratio for them continuously declined:from 61 to 1% and from 02% to 0003%,respectively.Furthermore,the decrease in leaves and the increase in branches and stems showed dual linear correlation (p<001).It shows that chance to receive biomass differ among different modulers.Branches have priority over stems in this aspect.
出处
《植物生态学报》
CAS
CSCD
北大核心
1997年第1期83-89,共7页
Chinese Journal of Plant Ecology
关键词
大头茶
构件种群
生物量及叶面积动态
Gordonia acuminata, Modular population,Biomass and leaf area dynamics
