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%。
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.
出处
《生态学杂志》
CAS
CSCD
北大核心
2013年第7期1800-1806,共7页
Chinese Journal of Ecology
基金
宁夏回族自治区财政林业新技术引进及推广项目(201205)
国家自然科学基金项目(30960087)
宁夏回族自治区研究生创新教育项目(A09008)资助
关键词
顽拗性种子
贮藏潜力
自动萌发
辽东栎
六盘山区
recalcitrant seed
storage potential
spontaneous germination
Quercus wutaishani-ca
Liupan Mountains.
