矮牡丹种群结构的研究

STUDIES ON POPULATION STRUCTURE OF PAEONIA SUFFRUTICOSA ANDR,VAR.SPONTANEA REHD.

延安万花山不同生境下矮牡丹种群年龄结构与表现结构的分析结果表明：天然侧柏林缘下的矮牡丹种群属稳定发展的种群，其动态符合负指数方程Ｎ＝１７７４．０１４．ｅ￣（－０．１３７６Ｔ）。而在较郁闭的辽东栎林下，矮牡丹种群呈阶段性重新循环。种群平均密度和单株最大年龄与所处生境有关。种群的表现结构因样地所在的环境条件不同，种群的年龄结构不同，以及生长速度的不同而有较明显的差异。

In this paper,the age and performance structures of Paeonia suffruticosa Andr.var.Spontanea pehd.population on different habitats are analyzed.The results shown that on the nat-ural secondary Chinese arborvitue forest edge, the population of P.suffruticosa Andr. var.spontanea Rehd. is a progressive population. The dynamics of population follows: N=1774.014.e￣(-0.1376t). But under the Quercus liaotungensis forest,The population regeneration is stage cyclicalregeneration. The maximtim age and mean density of this population are related to physical envi-ronment.Its performance structures has signinficant difference on forest fringe and under forest,along with the difference of habitats,age stages and growth rate.