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草业学报 ›› 2010, Vol. 19 ›› Issue (6): 93-99.

• 研究论文 • 上一篇    下一篇

不同供水量和种子处理对疏叶骆驼刺种子出苗的影响

刘镇1,2,3,曾凡江1,3*,刘波1,2,3,安桂香1,2,3,张晓蕾1,2,3,李绣东4   

  1. 1.中国科学院新疆生态与地理研究所,新疆 乌鲁木齐 830011;
    2.中国科学院研究生院,北京 100039;
    3.新疆策勒荒漠草地
    生态系统国家野外科学观测研究站,新疆 策勒 848300;
    4.策勒县气象局,新疆 策勒 848300
  • 收稿日期:2009-12-10 出版日期:2010-06-25 发布日期:2010-12-20
  • 作者简介:刘镇(1984-),男,山东济宁人,在读硕士。E-mail:liuzhen0504@163.com
  • 基金资助:
    国家自然科学基金项目(30670386,30870471),国家科技支撑计划项目(2009BAC54B01,2006BAD26B0202-1),新疆科技攻关与重点科技项目(200633130),新疆科技重大专项项目(200733144-2)和自治区科技基础条件平台建设项目(PT0801)资助。

Effects of water supply volume and seed treatments on seedling emergence of Alhagi sparsifolia

LIU Zhen1,2,3, ZENG Fan-jiang1,3, LIU Bo1,2,3, AN Gui-xiang1,2,3,
ZHANG Xiao-lei1,2,3, LI Xiu-dong4   

  1. 1.Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China;

    2.Graduate University of Chinese Academy of Sciences, Beijing 100039, China;
    3.Cele National
    Field Science Observation and Research Station of Desert Grassland Ecosystem, Qira
    848300, China;
    4.Cele Meteorological Bureau, Qira 848300, China
  • Received:2009-12-10 Online:2010-06-25 Published:2010-12-20

摘要: 疏叶骆驼刺是塔克拉玛干沙漠南缘荒漠-绿洲过渡带的优势植物种,也是当地防风固沙和草食家畜重要草种。本研究通过人工控制试验,设置6个水分梯度(4.4,8.8,13.2,17.7,26.4,35.4mm/d)和4个种子处理(对照,水分浸泡24和48h,98%浓硫酸浸泡20min),研究疏叶骆驼刺种子的出苗特征。结果表明,疏叶骆驼刺种皮对种子出苗有抑制作用;对于当年成熟的种子,水分浸泡是较佳的处理方式,浓硫酸浸泡20min对于前一年成熟的种子出苗则有明显的促进作用;对照处理的种子在13.2mm/d供水量时,达到最高出苗率,水分浸泡24,48h和浓硫酸浸泡20min处理后的种子都在4.4mm/d供水量时出苗率达到最大值,较对照处理最佳供水量有所降低;在供水量为4.4和8.8mm/d时,经过处理的种子开始萌发所需时间较对照处理缩短1~4d。疏叶骆驼刺种子有较长的出苗期,种子出苗具有持续性和连续性,这对于塔南地区植物种子萌发过程规避风险,提高种子萌发成功率具有很好的促进作用。

Abstract: Alhagi sparsifolia is one of the dominant species in the desert-oasis ecotone of the southern marginal zone of the Taklimakan Desert, a plant for wind protection, sand fixation, and a forage grass. The effects of various combinations of water supply volume (4.4, 8.8, 13.2, 17.7, 26.4 and 35.4 mm/d) and seed treatments (control, seed soaking in water for 24 and 48 h and soaking in concentrated sulfuric acid for 20 min) on ripening current year seeds of A. sparsifolia were investigated. Seed coats of A. sparsifolia inhibited seedling emergence. Soaking in water was a better treatment for current year ripening seeds than for last years, while soaking in concentrated sulfuric acid for 20 min was a better treatment for the latter. The optimal water supply volume was greater for seeds in the control than for those in the other treatments and the control seeds germinated after 2 to 6 d in the different water treatments. Soaking in water at 4.4 and 8.8 mm/d and in concentrated sulfuric acid shortened seed germination to 1 to 4 d. Seeds of A. sparsifolia showed a long and continuous germination and emergence pattern, a behavior that beneficially reduced the risk of all progeny of a plant germinating at the same time and dying before reproducing.

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