摘要
根系是连接植物与土壤的纽带,也是植物吸收水养资源的器官,在树木生理生活中发挥着至关重要的作用。杨树在我国北方被广泛栽植,其木材产量占我国总木材产量的30%。因此,了解杨树根系的各种特点有助于深入认识其生存和生长机制,以及在各种环境下的生态适应策略,从而为杨树林地高效经营管理技术的优化、林分质量和产量的双提升提供理论基础。本文基于已有研究,对杨树根系形态、分布、动态特征以及吸水特性等内容及部分研究方法进行了综述。首先,本文总结了已有研究中采用的各种根系分级方法,指出其各自的不足与可取之处,并提出更适合杨树根系分级的方法。其次,对现有研究中发现的各种杨树根系构型、形态、分布以及生长动态等特征进行了归纳总结,探讨了各种特征产生的原因以及对杨树根系吸收效率产生的影响。然后,总结了杨树根系在各种条件下的吸水特性与机制,并在最后提出了现有杨树根系研究的不足以及今后的发展方向。
Root is the link between plants and soil, and also the organ for plants to absorb water and nutrients. It plays a vital role in the physiological activities of plants. Poplar is widely planted in plain of North China, and the wood output accounts for almost 30% of the total wood output in China. Therefore,understanding the characteristics of poplar root is conducive to the in-depth understanding of its survival and growth mechanism, ecological adaptation strategies in various environments, so as to provide a theoretical basis for the optimization of efficient management technology of poplar plantation and the improvement of forest quality and forest yield. In this paper, based on the existing studies, the contents of poplar root morphology, distribution, dynamic characteristics, water absorption characteristics and some research methods are reviewed. Firstly, various root classification methods used in previous studies were discussed,then their shortcomings and merits and more suitable methods for poplar root classification were pointed out.Secondly, the various architecture, morphology, distribution and growth dynamics of poplar root found in existing studies were summarized, and the causes of various characteristics and their effects on the absorption efficiency of poplar root were discussed. Finally, the water absorption characteristics and mechanism of poplar root under various conditions were summarized, the deficiencies of existing research on poplar root and the future research direction were also put forward.
作者
席本野
Xi Benye(Key Laboratory for Silviculture and Conservation of Ministry of Education,Beijing Forestry University,Beijing 100083,China)
出处
《北京林业大学学报》
CAS
CSCD
北大核心
2019年第12期37-49,共13页
Journal of Beijing Forestry University
基金
国家科学自然基金项目(31872702、31670625、31971640)
北京林业大学中央高校基本科研业务费专项(2018ZY26)
“十二五”国家科技支撑计划(2015BAD09B02)
国家重点研发计划(2016YFD0600403)。
关键词
细根
粗根
根系分布
根系动态
杨树
fine root
coarse root
root distribution
root dynamics
poplar
