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作 者 ：闫巧玲^1,2;刘志民¹;李雪华¹;马君玲^1,2

期 刊 ：应用生态学报 2007年 18卷 04期 页码：777-782

关键词：子；

摘 要 ：比较了半干旱草原科尔沁沙地65种植物新采种子和埋藏1年种子的萌发特性.结果表明：埋藏1年后,有38种植物的种子仍具有活力.新采种子萌发率>80%的植物种子埋藏后萌发率下降；而萌发率<80%的植物种子埋藏后萌发率均有较大幅度的提高.埋藏对种子萌发特性的影响因植物生态类群(杂草、草原植物、草甸植物、沙生植物)而异.种子埋藏1年后,多年生植物萌发率没有明显提高,而1年生植物萌发率显著提高(P<0.05).对于新采种子和埋藏1年种子萌发率间相差10%以下的物种,可根据萌发格局将植物种分为3类：埋藏促进型(如差巴嘎蒿)、埋藏抑制型(如大籽蒿)和埋藏不变型(如鹤虱).

Abstract:The study on the germination characteristics of newly collected and one year-buried seeds of 65 plant species on Horqin semi-arid steppe showed that after one year’s burial, the seeds of 38 plant species still remained their vitality. For the species whose freshly collected seeds had a germination rate higher than 80%, the seed germination rate after burial was decreased, while it was in adverse for those whose freshly collected seeds had a germination rate less than 80%. The effects of burial on seed germination varied with the ecological types of the species (i . e . , weed, steppe species, meadow species, and psammophytes). After one year’s burial, the germination rate of perennials had no significant increase, but that of annuals increased significantly (P<0.05). The species with a <10% difference of germination rate between their freshly collected and one year-buried seeds could be classified into three categories, according to the seed germination pattern,i . e ., germination was promoted by burial (e . g .Artemisia halodendron), restrained by burial (e. g. A. sieversiana); and unchanged after burial (e.g. Lappula myosotis).

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