Journal of Plant Ecology ›› 2025, Vol. 18 ›› Issue (3): 1-13.DOI: 10.1093/jpe/rtaf040

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作物茎生物量分配的时间动态

  

  • 收稿日期:2025-02-28 接受日期:2025-03-21 出版日期:2025-06-01 发布日期:2025-06-25

Transient variation of stem mass fraction in crop plants

Renfei Chen1,*, Yao He1, Cenxi Shi1, Suping Xiao2, Karl J. Niklas3 and Jianming Deng4,*   

  1. 1School of Life Science, Shanxi Normal University, Taiyuan 030000, China
    2School of Mathematics and Computer Science, Shanxi Normal University, Taiyuan 030000, China
    3School of Integrative Plant Science, Cornell University, Ithaca, NY 14853, USA
    4State Key Laboratory of Herbage Improvement and Grassland Agro-Ecosystems, College of Ecology, Lanzhou University, Lanzhou 730000, China

    *Corresponding author. E-mail: dengjm@lzu.edu.cn (J.D.); chenrf@sxnu.edu.cn (R.C.)
  • Received:2025-02-28 Accepted:2025-03-21 Online:2025-06-01 Published:2025-06-25
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (grant 32225032, 32101235), the National Key Research and Development Program of China (2023YFF0805600), the Top Leading Talents in Gansu Province to J.D.

摘要: 植物生物量分配是生态学领域研究的核心议题,不仅有助于生态理论的发展,也对农业生产具有重要意义。经典生物量分配理论促进了学术界对生物量分配模式及其影响因素的认识。然而,越来越多的观测证据并不支持经典的生物量分配理论。近期研究表明,时间动态理论为解决这一问题提供了潜在途径。本研究分析了单作和间作系统中4种农作物(玉米、大豆、胡麻和小麦)茎生物量分配的生育期动态。结果发现,作物生育期内个体发育和种内竞争增强均会促进茎质量比的时间变异,而种间竞争增强则产生抑制效应。此外,总生物量较大的植物茎质量比具有更高的时间稳定性。上述结果将时间动态理论整合至生物量分配理论框架,并为该理论框架提供了实验数据支撑;同时,研究结果也为提高农业作物产量的稳定性奠定了基础。

关键词: 茎质量比, 生物量分配, 时间动态, 竞争, 个体发育

Abstract: The allocation of annual growth in biomass to primary plant organs is a central theme in ecology due to its role in developing ecological theories and agricultural applications. Classic theories have significantly improved our understanding of biomass allocation patterns influenced by various factors. However, increasing contrasting observations cannot be explained by classic theories. Recently, transient dynamic theory can resolve the problem. Here, we provide empirical evidence describing transient variations of biomass allocated to stems for four crop species (i.e. corn, soybean, flax, and wheat) in single and mixed systems. We show that plant ontogeny and increasing intraspecific competition promote variations in stem mass fractions. However, variations in stem mass fractions are reduced under strong interspecific competition. Plants with large total biomass have relatively stable stem mass fractions. These findings provide empirical foundations for integrating transient dynamics into general theoretical frameworks of biomass allocation patterns and may stabilize agricultural crop yields.

Key words: stem mass fraction, biomass allocation, transient dynamics, competition, ontogeny