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中国农学通报

中国农学通报 ›› 2013, Vol. 29 ›› Issue (22): 78-82.doi: 10.11924/j.issn.1000-6850.2013-0540

• 林学 园艺 园林 • 上一篇    下一篇

天然沙冬青土壤种子库特征研究

张进虎 王翔宇 张亮霞 何芳兰 杜娟   

  • 收稿日期:2013-03-01 修回日期:2013-03-29 出版日期:2013-08-05 发布日期:2013-08-05

Researchs on Soil Seed Bank of Ammopiptanthus

  • Received:2013-03-01 Revised:2013-03-29 Online:2013-08-05 Published:2013-08-05

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摘要： 通过野外样方调查、种子鉴定及种子发芽等相结合的方式，对天然沙冬青种群种子库进行研究，以期揭示天然沙冬青土壤种子库特征及与种群更新之间的关系。研究结果显示，天然沙冬青种群土壤种子库比较丰富，平均密度为11粒/m2；种子主要存在于土壤表层，在有结皮存在的情况下，种子才有可能存在于0~2 cm土层中，以下土层没有种子；沙冬青种子发芽率与土壤种子库呈负相关，种子库丰富的地方，种子的发芽率较低，这一对矛盾造成幼苗数量的稀少，进而影响天然沙冬青种群的自然更新。

关键词: 硝酸盐含量, 硝酸盐含量

Abstract: This article researched on soil seed bank of Ammopiptanthus by a combination way of quadrats survey, seed Identification, germination,to reveal the feature of soil seed bank and the relationship between the soil seed banks and population regeneration. The results show:The soil seed bank of Ammopiptanthus is relatively rich,the average density is 11seeds/m2; The seed mainly present on the soil surface,It is possible that there are some seeds in 0-2cm depth soil if crust exists,there is no seed below that; Seed germination rate and soil seed bank is negatively correlated,A place with high soil seed bank,but has low seed germination rate, This contradiction leads scarce seedling, and then Impacts the population regeneration of it.