Gao Guibin, Wen Xing, Wu Zhizhuang, Zhong Hao, Pan Yanhong, Zhang Xiaoping
China National Bamboo Research Center, Key Laboratory of State Forestry and Grassland Administration on Bamboo Forest Ecology and Resource Utilization, Hangzhou 310012, China.
National Long-Term Observation and Research Station for Forest Ecosystem in Hangzhou-Jiaxing-Huzhou, Plain, Hangzhou 310012, China.
Plants (Basel). 2024 Jun 26;13(13):1761. doi: 10.3390/plants13131761.
The ramet system is a typical structural type in the life history of clonal plants. This massive structure is formed by many similar ramets connected by underground rhizomes, which are independent and mutually influential. Therefore, the ramet system is unique to bamboo forests, and its role in the construction, maintenance, and productivity of bamboo populations is irreplaceable. Mulch management is a high-level cultivation model for bamboo forests that is used to cultivate bamboo shoots. However, the basic conditions of bamboo ramet systems in this managed model are poorly understood. This study analyzed the underground rhizome morphology, bud bank, and branching of bamboo ramets in a C.D. Chu et C.S. Chao 'Prevernalis' forest to explore the growth patterns of bamboo ramets in high-level management fields. In mulched bamboo forests, the bamboo rhizomes, distributed in intermediate positions of the bamboo ramet system, were long with many lateral buds and branches, and those at the initial and distal ends were short with few lateral buds and branches. The initial end of the ramet system reduced the ramet system, the intermediate part expanded the ramet system, and the distal end promoted ramet system regeneration. Owing to the continuous reduction, expansion, and renewal of ramet systems, the bamboo rhizome system demonstrates mobility and adaptability. This study found that a higher level of bamboo forest management increased the possibility of artificial fragmentation of the ramet system and that improving the efficiency of the ramet system was beneficial for maintaining its high vitality. Thus, this study provides a crucial reference for guiding the precise regulation of bamboo ramet systems in artificial bamboo forests.
分株系统是克隆植物生活史中一种典型的结构类型。这种庞大的结构由许多通过地下根茎相连的相似分株组成，它们既相互独立又相互影响。因此，分株系统是竹林所特有的，其在竹子种群的构建、维持和生产力方面的作用是不可替代的。覆盖管理是一种用于培育竹笋的竹林高级栽培模式。然而，对于这种管理模式下竹子分株系统的基本状况了解甚少。本研究分析了桂竹“春笋竹”林分中竹子分株的地下根茎形态、芽库和分枝情况，以探究高级管理田块中竹子分株的生长模式。在覆盖的竹林中，分布在分株系统中间位置的竹根茎较长，有许多侧芽和分枝，而在起始端和末端的则较短，侧芽和分枝较少。分株系统的起始端使分株系统减少，中间部分使分株系统扩展，末端促进分株系统再生。由于分株系统的不断减少、扩展和更新，竹根茎系统表现出移动性和适应性。本研究发现，较高水平的竹林管理增加了分株系统人为碎片化的可能性，并且提高分株系统效率有利于维持其高活力。因此，本研究为指导人工竹林中竹子分株系统的精准调控提供了关键参考。
