%0 Journal Article
%T Will competitiveness of resulting plants of persistent soil seed bank decline? Example from Eupatorium adenophorum<br>持久性土壤种子库种子萌发的个体竞争能力会衰减吗?——以紫茎泽兰为例
%A SHEN You-Xin
%A ZHAO Chun-Yan
%A <br>沈有信
%A 赵春燕
%J 植物生态学报
%D 2012
%I Editorial Office of Chinese Journal of Plant Ecology
%X Aims It has been assumed that plants grown from persistent soil seed bank (PSSB) are not less competitive because of soil storage. Our objective was to determine whether the competitiveness of plants of PSSB will decrease. Methods We compared heights and biomass of Eupatorium adenophorum plants grown from fresh seeds and grown from one-year-old buried PSSB seeds with no competition (control) and competition with density of 0.25, 1, 4 and 8 plants·cm–2. We also compared plants grown from fresh seeds and three-year-old buried PSSB seeds with no competition (control) and competition with density of 0.10, 0.17, 0.60 and 2.17 plants·cm–2. The PSSB seeds and fresh seeds were germinated simultaneously, and seedlings were grown in garden pots up to 175 days. Plant height was measured every 15 days and biomass was measured every 30 days (3 replicates). Important findings The height and biomass of plants of one- and three-year-old buried PSSB seeds were lower than for plants germinated from fresh seeds in the control (no competition) and with competition at most measuring times. However, most differences were not statistically significant.
%K biomass
%K density-dependence
%K persistence
%K seed storage
%K vigor reduction<br>生物量
%K 密度制约
%K 持久性能力
%K 种子储藏
%K 活力耗损
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=2F2173CCFF292BF447DC2681EA33BBAE&aid=42D88A52831D719F933DDFC730C22782&yid=99E9153A83D4CB11&vid=933658645952ED9F&iid=5D311CA918CA9A03&sid=9409F3EB075DCD5B&eid=1CBB73E9593E8833&journal_id=1005-264X&journal_name=植物生态学报&referenced_num=0&reference_num=0