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中国农学通报

中国农学通报 ›› 2013, Vol. 29 ›› Issue (31): 47-52.doi: 10.11924/j.issn.1000-6850.2013-1470

• 林学 园艺 园林 • 上一篇    下一篇

光照和沙埋对沙生针茅种子萌发与幼苗出土的影响

李发明 刘淑娟 张莹花 朱淑娟 刘克彪   

  • 收稿日期:2013-05-24 修回日期:2013-07-23 出版日期:2013-11-05 发布日期:2013-11-05
  • 基金资助:
    ：国家地区基金项目“荒漠区沙生针茅种子萌发机理研究”(31160264)；国际科技合作与交流专项“中国-联合国合作非洲水行动-非洲荒漠化国家防治 沙漠化技术合作与沙产业开发”(2010DFA32850)，“中国-联合国合作非洲水行动-非洲干旱地区干旱预警机制及适应性技术合作”(2010DFA92860)；甘肃省攻 关计划项目“2GS042-A41-002-02”；甘肃省自然基金项目“民勤荒漠草甸区芦苇种群的演替与恢复研究”(1010RJZA146)。

Effects of Light and Sand Burial on the Seed Germination and Seedling Emergence of stipa glareosa

Li Faming1,2, Liu Shujuan1,2, Zhang Yinghua1,2, Zhu Shujuan1,2, Liu Kebiao1,2, W   

  • Received:2013-05-24 Revised:2013-07-23 Online:2013-11-05 Published:2013-11-05

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摘要： 实验室温度（16℃-20.5℃）条件下研究了沙生针茅(Stipa glareosa)种子形态和在不同光照、划破种（果）皮和切除不同比例胚乳对种子萌发的影响；实验室模拟野外条件下对沙生针茅种子不同沙埋深度幼苗出土的影响。结果表明，黑暗条件下种子萌发率显著高于光条件下；移走胚乳75%时，种子萌发最快，而胚芽和培根生长量显著降低；沙埋深度显著影响沙生针茅的种子萌发率、幼苗出土率和种子休眠率。沙子表面的种子不能萌发；0.5 cm的浅层沙埋时的种子萌发率和幼苗出土率最高，1 cm沙埋的种子萌发率和幼苗出土率次之；沙埋深度超过2 cm之后，沙生针茅的种子萌发率和幼苗出土率与沙埋深度呈负相关。0.5 cm的种子休眠率最低。从2-8 cm，种子休眠率随着沙埋深度的增加而增加。在幼苗能够出土的深度(0.5-6 cm)，幼苗首次出土所需的时间随着沙埋深度的增加而延长。种子形态对沙生针茅的种子萌发率没有显著影响。

关键词: 碱法提取, 碱法提取

Abstract: In order to studyStipa glareosa seed germination characteristics and mechanism of dormancy, seed germination and experiment ecological methods was used to study the effects of different light, cut through the kind of and removal of different proportions of skin (fruit) onStipa glareosa endosperm germination and analog field conditions different burial depths seedling emergence. The results showed that:Stipa glareosa germination rate under dark conditions was significantly higher than light conditions; removal of 75% of the endosperm, Stipa glareosa germination was the fastest; different burial depth when buried of 0.5 cm in shallow sand seed germination andStipa glareosa was the highest rate of seedling emergence but dormancy rate was the lowest; sand burial depth of more than 2 cm after,Stipa glareosa seed germination, seedling emergence rate and sand burial depth was negatively correlated with sand burial depth dormancy rate increases.Stipa glareosa seed was the germination type latent dark conditions. Artificial seedingStipa glareosa seeds should be 0.5-2 cm depth is appropriate.

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