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土壤埋藏深度和埋藏时间对辽东栎种子萌发的影响

周立彪1,兴富1**,张嫱1,仇智虎2,李静1   

  1. (1北方民族大学生物科学与工程学院, 银川 750021; 2 宁夏罗山国家级自然保护区管理局, 宁夏红寺堡 751900)
  • 出版日期:2013-07-10 发布日期:2013-07-10

Effects of soil burial depth and duration on the seed germination of Quercus wutaishanica.

ZHOU Li-biao1, YAN Xing-fu1**, ZHANG Qiang1, QIU Zhi-hu2, LI Jing1   

  1. (1College of Biological Science and Engineering, Beifang University of Nationalities, Yinchuan 750021, China; 2Administration Bureau of Luoshan National Nature Reserve, Hongsibu 751900, Ningxia, China)
  • Online:2013-07-10 Published:2013-07-10

摘要:

以采自宁夏六盘山区的辽东栎(Quercus wutaishanica)种子为材料,研究了不同土壤埋藏深度(0、30和50 cm)和埋藏时间(2、4、6、8、10和12周)对种子萌发的影响,以探索辽东栎种子的安全贮藏条件和长期贮藏潜力,为辽东栎的种苗繁育和退化辽东栎灌丛及次生林的恢复实践提供参考。结果表明,尽管土壤埋藏处理前期(2周)种子萌发受到抑制,但随着埋藏时间的延长,萌发率提高,萌发速率加快,且萌发指数和活力指数均呈波动性增大趋势,埋藏12周后,30和50 cm埋深处理种子的萌发率分别为90.1%和96.8%。种子霉烂率表现为随埋藏深度的增加而提高的趋势,且各埋深处理种子的霉烂率随埋藏时间的延长而提高。种子埋藏2周后,开始出现自动萌发现象;埋藏12周后,30和50 cm埋深处理种子的自动萌发率分别为24.5%和43.0%。

 

关键词: 多源遥感数据, 无人机, 叶面积指数, 植被指数, 经验回归模型, 反演

Abstract: Quercus wutaishanica seeds were collected from Liupan Mountains of Ningxia, Northwest China to study their germination under effects of different soil burial depths (0, 30, and 50 cm) and durations (2, 4, 6, 8, 10, and 12 weeks), aimed to explore the safe storage condition and long storage potential of the seeds and to provide reference for the seedling reproduction of Q. wutaishanica and the recovery of degraded Q. wutaishanica shrubs. During the early period (two weeks) of soil burial, the seed germination of Q. wutaishanica was inhibited, but with the extending of burial duration, the germination percentage increased, germination rate accelerated, and germination index and vigor index presented a fluctuated increase. After burial for 12 weeks, the germination percentage of the seeds buried under 30 cm and 50 cm soil depths was 90.1% and 96.8%, respectively. The seed rot rate was increased with increasing burial depth and extending burial duration. After buried for 2 weeks, the seeds germinated spontaneously. After 12 weeks burial, the germination percentage of the seeds buried under 30 cm and 50 cm depths was 24.5% and 43.0%, respectively.

Key words: multi-source remote sensing data, unmanned aerial vehicle (UAV), leaf area index (LAI), vegetation index, empirical regression model, retrieving.