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中国沙漠 ›› 2025, Vol. 45 ›› Issue (4): 130-138.DOI: 10.7522/j.issn.1000-694X.2025.00086

• • 上一篇    

模拟风胁迫对杨树幼苗叶性状和养分回收特征的影响

王立龙1(), 段育龙1, 陈伊迪2, 李玉强1, 刘新平1()   

  1. 1.中国科学院西北生态环境资源研究院 干旱区生态安全与可持续发展全国重点实验室/奈曼沙漠化研究站,甘肃 兰州 730000
    2.奈曼旗大柳树国有治沙林场,内蒙古 奈曼旗 028300
  • 收稿日期:2025-05-14 修回日期:2025-06-30 出版日期:2025-07-20 发布日期:2025-08-18
  • 通讯作者: 刘新平
  • 作者简介:王立龙(1988—),男,甘肃兰州人,博士,助理研究员,主要从事恢复生态学方面的研究。E-mail: wanglilong@lzb.ac.cn
  • 基金资助:
    内蒙古自治区防沙治沙科技创新重大示范工程“揭榜挂帅”项目(2024JBGS0005-1);中央引导地方科技发展资金项目(2022ZY0145)

Effects of simulated wind stress on leaf traits and nutrient resorption of poplar seedlings

Lilong Wang1(), Yulong Duan1, Yidi Chen2, Yuqiang Li1, Xinping Liu1()   

  1. 1.State Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands / Naiman Desertification Research Station,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China
    2.Naiman Banner Big Willow State-owned Sand Control Forest Farm,Naiman Banner 028300,Inner Mongolia,China
  • Received:2025-05-14 Revised:2025-06-30 Online:2025-07-20 Published:2025-08-18
  • Contact: Xinping Liu

摘要:

中国荒漠化土地中风蚀区占比约70%,其植被长期面临风胁迫干扰。现有研究对长期风环境中植物的适应策略及养分利用机制仍缺乏系统认识,制约了风蚀区植被恢复与生态管理的科学决策。本研究通过模拟低风速(3~4 m·s-1)和高风速(7~8 m·s-1)两种风吹条件,分析生长季持续90 d风胁迫对杨树幼苗叶性状、结构性养分以及关键功能性养分回收特征的影响。结果表明:①风胁迫显著抑制叶片生物量积累,使植株矮化、构型紧凑化,叶面积和比叶面积均明显下降(P<0.05);②风胁迫显著提高叶片碳(C)、钙(Ca)含量,反映出结构性投入增强(P<0.05);③风胁迫显著降低叶片氮(N)、磷(P)、钾(K)的回收效率(P<0.05),且结构性养分含量与回收效率呈显著负相关(P<0.05)。研究表明,模拟风胁迫下杨树幼苗通过增加结构性投入以抵御机械损伤,但此策略降低了功能性养分在叶片衰老过程中的动员率,进而降低养分回收效率,体现出植物在风环境中权衡结构-功能的资源分配策略。本研究拓展了风胁迫背景下植物生态适应策略的研究。

关键词: 风蚀区, 模拟风胁迫, 功能性状, 养分回收效率, 结构性养分

Abstract:

Wind-eroded areas account for approximately 70% of China's desertified land, where vegetation is subject to persistent wind stress. However, plant adaptation strategies and nutrient utilization mechanisms under long-term wind conditions remain poorly understood, limiting effective ecological restoration and management in these regions. In this study, we simulated two wind regimes low wind speed (3-4 m·s⁻¹) and high wind speed (7-8 m·s⁻¹) to analyze the effects of simulated wind stress (90 days) on leaf traits, structural nutrient content, and key functional nutrient resorption in poplar (Populus spp.) seedlings. The results showed that: (1) sustained wind stress significantly reduced leaf biomass accumulation, led to plant dwarfing and compact architecture, and decreased both leaf area and specific leaf area; (2) wind stress markedly increased leaf carbon (C) and calcium (Ca) concentrations, indicating enhanced structural investment; (3) wind stress significantly inhibited nitrogen (N), phosphorus (P), and potassium (K) resorption efficiency, with structural nutrient content negatively correlated with nutrient resorption. These findings suggest that poplar seedlings adapt to sustained wind stress by allocating more resources to structural reinforcement to resist mechanical damage, but this strategy compromises the remobilization of functional nutrients, reflecting a structural-functional trade-off in resource allocation. This study advances our understanding of plant ecological adaptation strategies under wind-dominated environments and provides insights for vegetation restoration in wind-eroded desertified regions.

Key words: wind-eroded zone, simulated wind stress, functional traits, nutrient resorption efficiency, structural nutrients

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