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草业学报 ›› 2010, Vol. 19 ›› Issue (4): 41-46.

• 研究论文 • 上一篇    下一篇

甘肃贝母种子吸水及发芽特性研究

常彦莉1,陈垣1*,郭凤霞1,林玉红2,黎天3   

  1. 1.甘肃省干旱生境作物学重点实验室 甘肃农业大学农学院 甘肃农业大学生命科学技术学院,甘肃 兰州 730070;

    2.甘肃省农业科学院生物技术研究所,甘肃 兰州 730070;
    3.甘南州农业技术推广站,甘肃 甘南 747000
  • 收稿日期:2009-09-01 出版日期:2010-08-20 发布日期:2010-08-20
  • 作者简介:常彦莉(1984-),女,甘肃兰州人,在读硕士。E-mailcyl19840812@163.com
  • 基金资助:
    兰州市科技局项目(06-02-60)和甘南州财政局项目资助

A study on soaking and germination characteristics of Fritillaria przewalskii seeds

CHANG Yan-li1, CHEN Yuan1, GUO Feng-xia1, LIN Yu-hong2, LI Tian3   

  1. 1.Gansu Provincial Key Laboratory of Aridland Crop Science;
    College of Agronomy, Gansu Agricultural
    University;
    College of Life Sciences and Technology, Gansu Agricultural University, Lanzhou
    730070, China;
    2.Institute of Biotechnology, Gansu Academy of Agricultural Sciences,
    Lanzhou 730070, China;
    3.The Extension Station of Gannanzhou
    Agricultural Technologies, Gannan 747000, China
  • Received:2009-09-01 Online:2010-08-20 Published:2010-08-20

摘要: 对经后熟处理的甘肃贝母种子吸水规律进行测定,并设置不同温度(10,15,20,25,10/20℃变温)进行发芽试验,旨在为其人工驯化栽培提供依据。结果表明,甘肃贝母种子千粒重为0.72~0.82g。经20℃保湿储藏45d基本完成形态后熟,沙子与种子(4∶1)混合5~10℃层积150d基本完成生理后熟,种子吸水过程符合Logistic曲线,分急剧吸水期、稳定吸水期和饱和吸水期3个阶段。温度对经后熟处理的甘肃贝母种子发芽质量具有显著影响。黑暗下10~15℃内,随温度升高发芽质量显著改善,15℃发芽最佳,发芽率和发芽势分别达90.67%和89.33%。当温度超过15℃,发芽质量又显著降低,高温还抑制芽的伸长。以上结果说明经后熟处理后,温度是决定甘肃贝母种子发芽质量的关键因素。建议生产中当土温达15℃是甘肃贝母种子最佳播期,育苗期应保湿遮阳。

Abstract: The effect of soaking Fritillaria przewalskii seeds following after-ripening, and the seed germination characteristics at different temperatures (10, 15, 20, 25, 10/20℃ change), were measured in order to provide a theoretical basis for their artificially domesticated cultivation. The 1000-grain weight ranged from 0.72 to 0.82 g. The seeds completed morphologic after-ripening following storage for 45 d at 20℃ and physiological after-ripening after seeds were mixed with sand (sand∶seed ratio of 4∶1) for 150 d at 5-10℃. The soaking process fitted a Logistic curve, which included sharp soaking, stable soaking and saturated soaking stages. Under dark conditions, the seed germination quality improved with increased temperature and reached an optimum at 15℃ with a germination rate of 90.67% and germination power of 89.33%. However, when the temperature exceeded 15℃, seed germination was significantly reduced and sprout growth was restrained. Temperature was the key condition for seed germination following after-ripening. This suggests that the best time to sow F. przewalskii seeds is under humid and adumbral conditions when the soil temperature is 15℃.

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