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温度、基质对泡泡刺种子萌发的影响

李秋艳1;方海燕2   

  1. 1中国科学院烟台海岸带可持续发展研究所, 山东烟台 264003;2中国科学院地理科学与资源研究所, 北京 100101
  • 收稿日期:2007-07-24 修回日期:1900-01-01 出版日期:2008-05-10 发布日期:2008-05-10

Effects of temperature and substrate type on germination of Nitraria sphaerocarpa.

LI Qiu-yan1;FANG Hai-yan2   

  1. 1Yantai Institute of Coastal Zone Research for Sustainable Development,
    Chinese Academy of Sciences, Yantai 264003, Shandong, China;2Institute o
    f Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
  • Received:2007-07-24 Revised:1900-01-01 Online:2008-05-10 Published:2008-05-10

摘要: 研究了温度、种子大小和基质对荒漠植物泡泡刺种子萌发的影响。结果表明: 无论是滤纸还是沙子基质上,泡泡刺种子的萌发率、平均萌发时间和萌发率指数受温度的影响显著,而受种子大小的影响不显著。在沙子处理中,较高的萌发率发生在恒温25 ℃~35 ℃和变温20 ℃/30 ℃,10 ℃时萌发率较低。平均萌发时间随着温度的上升而呈下降趋势。在滤纸和沙子基质中,泡泡刺萌发的基本温度、最佳温度和最高温度分别为9.0 ℃、25.3 ℃、45.2 ℃和4.8 ℃、34.1 ℃、45.0 ℃。从4.8 ℃~45 ℃,泡泡刺种子可萌发的热量范围广,说明了泡泡刺定植的高度潜力。在荒漠生态系统恢复中,这种特性可使泡泡刺成为较好的候选者。

关键词: 富营养化, 植物修复, 底泥, 水生植物

Abstract: This study examined the effects of temperature, seed size, and substrate type on the germination of Nitraria sphaerocarpa. The results showed that either on filter paper or on sand substrate, the germination percentage, mean germination time, and germination rate index of N. sphaerocarpa were significantly affected by temperature, but not by seed size. On sand substrate, the germination percentage was higher at constant temperature of 25 ℃-35 ℃ and alternating temperature of 20 ℃/30 ℃, but lower at 10 ℃. The mean germination time was decreased with increasing temperature. On filter paper and sand substrate, the base temperature, optimum temperature, and maximum temperature of germination were 9.0 ℃, 25.3 ℃ and 45.2 ℃, and 4.8 ℃, 34.1 ℃ and 45.0 ℃, respectively. This extended temperature range forN. sphaerocarpa germination and the ability of N. sphaerocarpa to germinate rapidly suggested the high potential of N. sphaerocarpa to establish on sandy land.

Key words: Eutrophication, Phytoremediation, Sediment, Aquatic plant