蚌湖湖滨带的土壤种子库特征  

Soil Seed Bank and Ecological Implications for the Lakeshore Marsh of Bang Lake,a Part of Poyang Lake

作　　者：李守淳[1,2,3] 刘文治[1] 刘晖[1,4] 李伟[1] 

机构地区：[1]中国科学院武汉植物园,武汉430074 [2]江西师范大学鄱阳湖湿地与流域研究教育部重点实验室,南昌330027 [3]中国科学院研究生院,北京100049 [4]水利部中国科学院水工程生态研究所,武汉430079

出　　处：《植物科学学报》2011年第2期164-170,共7页Plant Science Journal

基　　金：江西省教育厅基金项目(赣教技字[2006]125号);江西省自然科学基金项目(2010GZN0117)

摘　　要：采用幼苗萌发法,在湿润和淹水两种水位萌发条件下,研究了蚌湖(鄱阳湖子湖)湖滨带5个水位梯度区的土壤种子库特征。结果表明,种子库中共萌发了33个物种,分属15科29属。物种组成以一年生草本为主,其中莎草科、禾本科、菊科、玄参科和水鳖科的物种数最多。不同水位区种子库的物种组成和幼苗密度差异不显著。种子库在两种水位条件下萌发的结果有显著差异,湿润条件下种子库萌发的物种以湿生和挺水植物为主,而在淹水条件下萌发的沉水植物种类和幼苗数量显著增多,其幼苗密度占总幼苗数的36%。t检验表明种子库在淹水条件下每个萌发盒中萌发的物种数(7.2±2.8)显著多于湿润条件(4.2±2.0)。Characteristics of soil seed banks in the lakeshore marsh of Bang Lake, a part of Poyang Lake, were studied under moist and inundation conditions using the germination test. A total of 33 species belonging to 15 families and 29 genera were recorded in the seed banks, with most being annual herbs. The most abundant families were Cyperaceae, Gramineae,Compositae,Scrophulariaceae, and Hydrocharitaceae. There was no significant difference in species richness and seedling density among water level zones. A total of 21 species were detected under moist condition,while 23 were detected under inundation conditions. A t-test showed that species richness in each germinated tray under inundation conditions （7.2 ＋2.8） was significantly higher than that under moist conditions （4.2 _＋2.0）. No significant difference in seedling density was found between moist and inundation conditions. Seedlings germinated under moist conditions were mainly composed of mud-flat and emergent species,while those under inundation conditions included seven submerged species. According to the above resuits,this paper discusses the important role of spring water levels of the Poyang Lake in terms of vegetation development and conservation in littoral zones.

关 键 词：湖滨带 鄱阳湖 湿地植被 水位波动 种子库 

分 类 号：Q948.1[生物学—植物学]