植物生态学报 ›› 2025, Vol. 49 ›› Issue (9): 1498-1514.DOI: 10.17521/cjpe.2024.0336  cstr: 32100.14.cjpe.2024.0336

• 研究论文 • 上一篇    下一篇

华东地区两种典型立体绿化植物根系性状特征及对新型土壤基质的响应

邢强1(), 赵斌2,*()(), 胡永红1, 杨君1, 秦俊1, 刘何铭1, 王红兵3, 周鹏4   

  1. 1上海辰山植物园城市园艺技术研发与推广中心, 上海 201602
    2复旦大学生命科学学院, 上海 200433
    3上海师范大学生命科学学院, 上海 200234
    4上海交通大学农业与生物学院, 上海 200240
  • 收稿日期:2024-09-29 接受日期:2025-02-07 出版日期:2025-09-20 发布日期:2025-02-08
  • 通讯作者: *赵斌: ORCID: 0000-0002-3530-2469 (zhaobin@fudan.edu.cn)
  • 基金资助:
    上海市科学技术委员会科技创新行动计划(23DZ1204605);上海市绿化和市容管理局科研专项(G242422);国家自然科学基金(52378072)

Root trait variation in response to a novel soil substrate in two typical vertical greening plants from the East China

XING Qiang1(), ZHAO Bin2,*()(), HU Yong-Hong1, YANG Jun1, QIN Jun1, LIU He-Ming1, WANG Hong-Bing3, ZHOU Peng4   

  1. 1Urban Horticulture Research and Extension Center, Shanghai Chenshan Botanical Garden, Shanghai 201602, China
    2School of Life Science, Fudan University, Shanghai 200433, China
    3College of Life Sciences, Shanghai Normal University, Shanghai 200234, China
    4School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
  • Received:2024-09-29 Accepted:2025-02-07 Online:2025-09-20 Published:2025-02-08
  • Supported by:
    project of Science and Technology Commission of Shanghai Municipality(23DZ1204605);Shanghai Municipal Greening and Urban Facilities Management Bureau(G242422);National Natural Science Foundation of China(52378072)

摘要: 植物生物量变化与根系构型的多维性特征研究对复合利用建筑空间来增加城市绿量、提升生态服务功能和提高建筑品质具有积极的影响, 是城市绿化建设合理性的重要理论依据。该研究选取中国华东地区城市景观中使用频率高、根系发达的两种藤本植物: 悬垂型花叶蔓长春(Vinca major ‘Variegata’)和攀爬型花叶络石(Trachelospermum jasminoides ‘Variegatum’), 种植于两种栽培基质中——一种是由复合纤维黏结形成的新型容器式基质, 另一种是传统混配基质。通过3年时间对比研究两种植物在相同根域体积下的根系构型和生物量的动态变化, 建立植物生长曲线模型, 预测不同基质中植物寿命。结果表明: 1)植物生物量和根系构型在传统混配基质中呈快速增长到衰亡的全生命周期单峰变化曲线, 而在新型基质中则呈线性缓慢增长趋势。2)不同介质类型中植物生物量和根系构型的主成分分析发现, 根长、根尖数、根分叉数及根表面积、根体积对于主轴的贡献率较高, 而且分析其与生物量的相关性, 均显示为显著相关, 因此, 可作为评估植物使用寿命的重要指标。其中, 根表面积和根体积是稳定的、系统性的评估参数, 而根长和根尖数量则是高灵敏度的评估参数。3)植物生长曲线模型预测结果表明, 两种植物在新型基质中达到生长高峰期的时间分别为6.99和10.77年, 显著长于在传统混配基质中的2-3年。新型基质适宜的紧实度和缓释的养分供给模式能够长时间保持较高的植物根系活力和周转速率, 从而在延长植物寿命的同时, 也维持了较高的生态效益。该研究通过揭示和量化城市绿化藤本植物根系的复杂结构, 以及对地上生长的影响, 有助于构建更加稳定高效的绿化植物群落, 提升城市生物多样性水平, 同时为绿色屋顶和垂直绿墙等特殊生境的绿化营建技术迭代提供实验理论支撑。

关键词: 根系构型, 生物量, 可固化新型容器式基质, 根域限制, 根经济学谱, 生境, 城市生态

Abstract:

Aims Understanding the multidimensional traits of plant biomass dynamics and root system architecture is essential for optimizing the use of building space to enhance urban green volume, improve ecological service quality and promote overall building performance. This study provides theoretical support for rational urban greening construction.
Methods Two commonly used lianas with well-developed root systems, Vinca major ‘Variegata’ (cascading type) and Trachelospermum jasminoides ‘Variegatum’ (climbing type), were selected from urban greening landscapes in East China. The study compared their three-year growth dynamics, root architecture, and biomass changes across different substrates and predicted their longevity under these conditions.
Important findings (1) Plant biomass and root architecture followed a unimodal growth pattern in the traditional mixed substrate, with a rapid increase followed by a decline, whereas in the novel medium, they exhibited a steady, linear growth trend. (2) Correlation and principal component analyses of plant biomass and root architecture across different substrate types revealed significant variations in root length, number of root tips, root forks, root surface area, and root volume. These traits were identified as key indicators for modeling plant longevity, each serving distinct functions: root surface area and root volume were stable, systematic assessment parameters, while root length and number of root tips were highly sensitive evaluation parameters. (3) Growth curves modeling of plants cultivated in the novel container medium predicted peak growth periods of 6.99 and 10.77 a, respectively, substantially longer than the 2-3 a observed in the traditional mixed substrate. The optimal compaction and nutrient content of the novel medium enhanced root vitality and turnover, thereby extending plant lifespan and the duration of ecological services. By revealing and quantifying the complex structure and function of the root system of urban greening vines, this study helps to build a more stable and efficient plant community, which can improve the level of urban biodiversity. Additionally, it provides experimental and theoretical support for iterative greening camping techniques for special habitats such as green roofs and vertical green walls.

Key words: root architecture, biomass, solidifiable soil substrates, root domain restriction, root economics spectrum, habitat, urban ecology