摘要
研究了内伶仃岛不同群落中薇甘菊土壤种子库动态。结果表明,在薇甘菊土壤种子库中,上层(0～3cm)土壤种子库密度显著高于下层(3～5cm),从地表向下随着深度的增加,活力种子逐渐减少,幼苗主要由上层土壤中的种子萌发而成。群落所处的演替阶段影响薇甘菊种群的开花结实,从而影响到薇甘菊种子的产生和种子库的储量。处于演替后期的群落中种子库储量下降。
Dynamics of soil seed bank of exotic weed Mikania micrantha populations in three communities in Neilingding Island were studied. The results showed that densities of soil seed bank in upper layer soil were higher than that in lower layer soil. With the increasing of soil depth, vigor seed decreased. Seedlings mainly came from the seeds in upper layer soil. Seed production and soil seed bank of the three populations of M. micrantha were different due to different succession stage of the three communities. Density of seed bank in community in later succession stage was lower than that of in early succession stage of community.
出处
《武汉植物学研究》
CSCD
北大核心
2005年第1期49-52,共4页
Journal of Wuhan Botanical Research
基金
中国林科院重点项目(2002ZD01)
广东省林业科技重点攻关项目(2000-01)
深圳市科技局项目(200001080)。
关键词
薇甘菊
土壤种子库
动态
Mikania micrantha
Soil seed bank
Dynamic
