金安桥水电站弃渣场土壤种子库与地面植被的关系

通过研究金安桥水电站废弃渣场种子库和周边群落种子库以及渣场地面和周边群落地面植被的变化特征，结果表明：①周边群落土壤种子库和地面植物的物种丰富度大于渣场，从地面与种子库的物种组成分析得出，渣场植被恢复正处于由一年生草本植物向多年生草本植物过渡的阶段；②周边群落地面植物与土壤种子库的物种丰富度（30，33）及数量（186，1962），渣场地面植物与土壤种子库的物种丰富度（10，12）及数量（35，1784）；③由于植物种子寿命短，加之土壤环境差，导致周边群落地面植物与种子库相似度（0．09）和渣场地面植物与种子库的相似度（0）差异性大。

Relationship between Soil Seed Bank and Ground Vegetation in the Abandoned Dreg Site of Jin'anqiao Hydropower Station

It is studied the changing characteristics of soil seed bank and the vegetation at the abandoned dreg site and surrounding community of Jin~nqiao Hydropower Station. The results are follows ：Speeies diversity of vegetation and soil seed bank in surrounding community are higher than those at the abandoned dreg site. The results of analysis on the species composition of ground vegetation and soil seed bank reveal that the vegetation recovery at the abandoned dreg site is at the succession stage from annual herbs to perennials herbs; （~） Richness indexes of species vegetation and of soil seed bank （30 and 33 ） and their quantities （186 and 1962） in the surrounding community are higher than that of vegetation and soil seed banks （10 and 12）and their quantities （35 and 1784）in the abandoned dreg site; Similarity index of species vegetation and of soil seed bank （0.09） in the surrounding community and of vegetation and soil seed banks（0） in the abandoned dreg site are low, because vegetal seeds＂ life span are short and environment of soil is bad.