...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Ecological research >Seed germination and seedling growth in the arrow bamboo Fargesia qinlingensis
【24h】

Seed germination and seedling growth in the arrow bamboo Fargesia qinlingensis

机译：秦bamboo箭竹种子萌发与幼苗生长

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Improving natural regeneration of bamboos after they die following mass flowering is critical for conservation of giant pandas. However, little is known about factors that affect seed germination and seedling growth of bamboos. We studied seed germination and seedling growth in Fargesia qinlingensis, which mass flowered in a giant panda habitat in the Qinling Mountains of China in early 2000, in laboratory and greenhouse conditions. Seed germination rate was tested under light and dark conditions 5 and 12 months after seed collection. Germination rate displayed no significant difference under light or dark conditions 5 months after seed collection, but was significantly greater in the dark than under light 12 months after seed collection, suggesting light inhibition of seed germination. A 2x2 factorial design was conducted to test the effects of nitrogen (N fertilization and non-N fertilization) and light [full sun and shade (i.e., 14% full sun)] on seedling growth and biomass allocation. N fertilization significantly increased seedling growth, resulting in greater seedling height, more branches, more leaves, greater stem biomass, and greater leaf biomass. Seedlings under 14% full sun conditions had a significantly lower percentage of biomass allocated to the stem. The root/shoot ratio was significantly greater in non-N/shade than non-N/full sun, while there was no significant difference in this ratio between N/shade and N/full sun, suggesting that nitrogen fertilization compensated for the effect of shade on biomass allocation. Our results suggest that N fertilization could be employed in restoration of F. qinlingensis stands after die-off following mass flowering.
机译：竹子大量开花后死亡后，提高其自然再生能力对于保护大熊猫至关重要。但是，对于影响竹子种子发芽和幼苗生长的因素知之甚少。我们在实验室和温室条件下研究了秦岭Fargesia的种子发芽和幼苗生长，该种群在2000年初在中国秦岭的大熊猫栖息地开花。种子收集后5个月和12个月，在光照和黑暗条件下测试种子的发芽率。种子收集后5个月的光照或黑暗条件下的发芽率没有显着差异，但在黑暗中比种子收集后12个月的光照条件下的发芽率显着更大，表明光照抑制了种子发芽。进行2x2阶乘设计，以测试氮素（氮肥和非氮肥）和光照（充足的日光和阴暗（即14％的阳光））对幼苗生长和生物量分配的影响。施氮显着提高了幼苗的生长，从而导致更高的幼苗高度，更多的枝条，更多的叶子，更大的茎生物量和更大的叶片生物量。在14％的日照条件下，幼苗分配给茎的生物量百分比显着降低。在非氮/遮荫下，根/茎比显着大于非氮/遮蔽日照，而氮/遮荫与氮/全晒之间的根比没有显着差异，表明氮肥补偿了氮素的影响。遮盖生物量。我们的研究结果表明，在大量开花后死掉的秦岭林木中，可采用氮肥进行恢复。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号