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当前位置: 首页 > 文章 > 不同供水量和种子处理对疏叶骆驼刺种子出苗的影响 草业学报 2010,19 (6) 95-101
Position: Home > Articles > Effects of water supply volume and seed treatments on seedling emergence of Alhagi sparsifolia Acta Prataculturae Sinica 2010,19 (6) 95-101

不同供水量和种子处理对疏叶骆驼刺种子出苗的影响

作  者：
刘镇;曾凡江;刘波;安桂香;张晓蕾;李绣东
单  位：
策勒县气象局;中国科学院新疆生态与地理研究所
关键词：
疏叶骆驼刺;种子处理;供水量;出苗率
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(4.4,8.8,13.2,17.7,26.4,35.4 mm/d)和4个种子处理(对照,水分浸泡24和48 h,98%浓硫酸浸泡20 min),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20 min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13.2 mm/d供水量时,达到最高出苗率,水分浸泡24,48 h和浓硫酸浸泡20 min处理后的种子都在4.4 mm/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8.8 mm/d时,经过处理的种子开始萌发所需时间较对照处理缩短1~4 d。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。
译  名：
Effects of water supply volume and seed treatments on seedling emergence of Alhagi sparsifolia
作  者：
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.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)
关键词：
Alhagi sparsifolia;seed treatment;water supply volume;seedling emergence rate
摘  要：
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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