Phyllostachys rivalis rhizome and root system waterlogging b

  本文关键词：淹水对河竹鞭根系统生物量分配及异速生长模式的影响，，由笔耕文化传播整理发布。

淹水对河竹鞭根系统生物量分配及异速生长模式的影响

Effect of Waterlogging on Biomass Allocation and Allometric Pattern of Rhizome and Root System of Phyllostachys rivalis

[1] [2] [3] [4] [5]

LIU Yu-fang, CHEN Shuang-lin, GUO Zi-wu, LI Ying-chun, YANG Qing-ping （Research Institute of Subtropical Forestry,Chinese Academy of Forestry,Hangzhou 311400,Zhejiang,China）

中国林业科学研究院亚热带林业研究所,浙江杭州311400

文章摘要：为了揭示长期淹水对河竹鞭根系统生物量分配及异速生长模式的影响，调查测定了人工喷灌供水（CK）和淹水处理（TR）3、6个月的河竹1年生竹鞭及其根系的生物量，分析了河竹鞭、根生物量分配对淹水环境的适应和响应策略。结果表明：淹水条件下河竹根系生长受到抑制，生物量分配比例鞭〉根。与CK相比，淹水条件下河竹根系生物量及根系生物量／总生物量显著降低，鞭生物量／总生物量升高。随着淹水时间的延长，河竹鞭、根大量生长，生物量显著升高，但根生物量／总生物量、鞭生物量／总生物量和水中鞭生物量／总生物量变化并不明显。河竹鞭、根生物量间的关系在TR和CK处理下均符合幂函数增长关系，但淹水条件下的异速生长指数b要高于CK。研究表明河竹在鞭根系统生长和物质分配上具有较大的生态可塑性和可调节性，可以通过鞭根系统的生物量合理分配和异速生长调节以逐步适应淹水环境。研究结果可为河竹在水湿地和江河湖库消落带植被恢复中的应用提供参考。

Abstr：This paper is to study the effect of the waterlogging on biomass allocation and allometric pattern of rhizo- me and root system in Phyllostachys rivalis. The biomass of 1-year-old bamboo rhizome and root was investigated in a pot experiment with treatments of artificial irrigation and waterlogging for three and six months. The response, ada- ptative strategy of biomass allocation in rhizome and root of Ph. rivalis under long-term waterlogging conditions were analyzed. The results showed that the growth of roots was inhibited under waterlogging conditions and the allocation proportion of Ph. rivalis biomass was in the order of rhizome 〉 root. Compared to the CK, the biomass of root and the ratio of root biomass to total biomass decreased significantly, the ratio of rhizome biomass to total biomass in- creased in the TR. It would grow lots of rhizome and root with the extension of waterlogging time and the biomass in- creased significantly. But no obvious impact of waterlogging on the proportion of rhizome biomass, root biomass or waterlogged rhizome in total biomass. The relationship between rhizome biomass and root biomass of Ph. rivalis ac- corded with positive power function in TR and CK. But the growth index in TR was higher than that in CK. By this research it showed that Ph. rivalis has ecological plasticity and regulatory on material distribution and growth of rhi- zome and root. And it could adapt to the waterlogging conditions gradually through reasonable distribution of biomassand allometric accommodation. This research could provide references for its application in vegetation restoration of wetland and areas of fluctuating water tables.

文章关键词：

Keyword：:Phyllostachys rivalis rhizome and root system waterlogging biomass allocation allometric pattern growth strategy

课题项目：浙江省中国林业科学研究院省院合作项目（2012SY05）;浙江省自然科学基金项目（LY13C160001）;中央级公益性科研院所基本科研业务费专项资金项目（RISF61258）

  本文关键词：淹水对河竹鞭根系统生物量分配及异速生长模式的影响，由笔耕文化传播整理发布。