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应用生态学报 ›› 2026, Vol. 37 ›› Issue (8): 2509-2518.doi: 10.13287/j.1001-9332.202608.004

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宁夏罗山不同植被类型地上-地下生态化学计量特征及异速生长关系

杨盈盈1, 杨天宇2, 郭邵华1, 刘芳妤1, 曹兵1, 杨君珑1, 徐雪蕾1*   

  1. 1宁夏大学林业与草业学院林木资源高效生产全国重点实验室, 银川 750021;
    2宁夏中卫沙坡头国家级自然保护区管理局, 宁夏中卫 755000
  • 收稿日期:2026-01-26 修回日期:2026-06-02 出版日期:2026-08-18 发布日期:2027-02-18
  • 通讯作者: *E-mail: xuxuelei@nxu.edu.cn
  • 作者简介:杨盈盈, 女, 1999年生, 硕士研究生。主要从事森林生态学研究。E-mail: 1735484852@qq.com
  • 基金资助:
    国家自然科学基金项目(32260421)和宁夏青年科技托举人才培养项目

Aboveground-belowground stoichiometric characteristics and allometric relationships across different vegetation types in Luo Mountain, Ningxia, China

YANG Yingying1, YANG Tianyu2, GUO Shaohua1, LIU Fangyu1, CAO Bing1, YANG Junlong1, XU Xuelei1*   

  1. 1State Key Laboratory of Efficient Production of Forest Resources, School of Forestry and Grassland Science, Ningxia University, Yinchuan 750021, China;
    2Ningxia Zhongwei Shapotou National Nature Reserve Administration, Zhongwei 755000, Ningxia, China
  • Received:2026-01-26 Revised:2026-06-02 Online:2026-08-18 Published:2027-02-18

摘要: 以宁夏罗山荒漠草原、浅山灌丛、阔叶林、针阔混交林和针叶林5种植被类型为对象,研究其地上与地下部分生态化学计量特征差异,以及二者间的化学计量异速生长关系与内稳性特征,分析影响地上、地下生态化学计量的主要凋落物与土壤养分因子。结果表明:各植被类型叶碳、氮、磷含量均显著高于根系。其中,荒漠草原的叶片碳含量最高(464.45 g·kg-1),显著高于3种森林类型,而其根系碳含量最低(235.44 g·kg-1),显著低于其余4种植被类型。在5种植被类型中,浅山灌丛的叶片氮、磷含量最低(分别为18.43和0.58 g·kg-1),而叶片C/N、C/P、N/P最高(分别为24.9、795.5和31.9)。5种植被类型叶-根间的碳含量呈显著的负异速生长关系,而叶-根间的磷含量呈显著的正异速生长关系。叶片C-P间为负异速生长,叶片N-P间和根系C-N间均为等速生长。叶片和根系的氮含量及C/N、C/P、N/P均保持绝对稳态,而磷含量均为敏感型。凋落物N/P对叶片生态化学计量的影响最大,凋落物C/P对根系生态化学计量的影响最大。罗山各植被类型植物地上部分养分分配均高于地下部分,浅山灌丛养分利用策略更倾向于资源保守型,而其余植被类型更倾向于资源获取型。罗山植物碳分配表现为权衡策略,磷分配为协同策略。

关键词: 生态化学计量特征, 植被类型, 异速生长关系, 内稳性

Abstract: We investigated the differences in ecological stoichiometric characteristics between aboveground and belowground components across five typical vegetation types in the Luo Mountain, Ningxia, including desert steppe, shallow mountain shrubland, broadleaf forest, mixed coniferous and broad-leaved forest, and coniferous forest. We examined the allometric growth relationships and homeostasis features of aboveground and belowground stoichiome-try, and analyze the main litter and soil nutrients influencing ecological stoichiometry. Results showed that leaf carbon (C), nitrogen (N), and phosphorus (P) contents were significantly higher than roots across all vegetation types. Desert steppe exhibited the highest leaf C content (464.45 g·kg-1), being significantly higher than the three forest types, while its root C content was the lowest (235.44 g·kg-1). Shallow mountain shrubland had the lowest leaf N and P contents (18.43 and 0.58 g·kg-1, respectively), while its leaf C/N, C/P, and N/P were the highest (24.9, 795.5, and 31.9, respectively). The five vegetation types exhibited significant negative allometric relationship between leaf and root C contents. There was significant positive allometric relationship for leaf and root P contents. Leaf C-P exhibited negative allometry, whereas leaf N-P and root C-N showed isometric growth. Leaf and root N contents, along with C/N, C/P, and N/P, remained absolutely stable, while P content was consistently sensitive. Litter N/P had the greatest impact on leaf stoichiometry, while litter C/P most influenced root stoichio-metry. Aboveground nutrient allocation was higher than belowground part in all vegetation types of Luo Mountain, with shallow mountain shrubland adopting a more conservative resource utilization strategy, while the other vegetation types tended to be resource acquisition. There was a trade-off for C allocation in Luo Mountain plants, but a synergistic strategy for P allocation.

Key words: ecological stoichiometric characteristics, vegetation type, allometric growth relationship, homeostasis