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植物研究 ›› 2025, Vol. 45 ›› Issue (6): 997-1002.doi: 10.7525/j.issn.1673-5102.2025.06.016

• 研究论文 • 上一篇    

沙冬青与霸王群落交错区种内与种间竞争关系

都兰, 王铁娟(), 周雪萌, 张蕊, 张冰冰, 冯婧   

  1. 内蒙古师范大学生命科学与技术学院,内蒙古自治区高等学校蒙古高原生物多样性保护与可持续利用重点实验室,呼和浩特 010022
  • 收稿日期:2024-11-30 出版日期:2025-11-20 发布日期:2025-11-27
  • 通讯作者: 王铁娟 E-mail:wtj105@163.com
  • 作者简介:都兰(1999—),女,硕士研究生,主要从事植物生态学研究。
  • 基金资助:
    内蒙古自治区科技计划项目(2020GG0124)

Intraspecific and Interspecific Competition Relationship Between Ammopiptanthus mongolicus and Zygophyllum xanthoxylum in theEcotone

Lan DU, Tiejuan WANG(), Xuemeng ZHOU, Rui ZHANG, Bingbing ZHANG, Jing FENG   

  1. College of Life Science and Technology,Inner Mongolia Normal University,Key Laboratory of Biodiversity Conservation and Sustainable Utilization in Mongolian Plateau for College and University of Inner Mongolia Autonomous Region,Hohhot 010022
  • Received:2024-11-30 Online:2025-11-20 Published:2025-11-27
  • Contact: Tiejuan WANG E-mail:wtj105@163.com

摘要:

为了研究珍稀濒危植物沙冬青(Ammopiptanthus mongolicus)受到的竞争影响,选择沙冬青与霸王(Zygophyllum xanthoxylum)群落交错区,利用Hegyi单木竞争模型,通过对25株沙冬青对象木的调查,分析沙冬青的种内与种间竞争关系。结果表明:沙冬青的种内和种间竞争强度分别占总竞争强度(341.32)的5.09%和94.91%,说明沙冬青的竞争主要来源于种间。群落交错区内沙冬青的竞争木种类较多,竞争强度由大到小依次为内蒙古旱蒿(Artemisia xerophytica)、矮脚锦鸡儿(Caragana brachypoda)、霸王、猫头刺(Oxytropis aciphylla)、沙冬青、长叶红砂(Reaumuria trigyna)、驼绒藜(Krascheninnikovia ceratoides)、红砂(Reaumuria soongarica)、绵刺(Potaninia mongolica)、戈壁天门冬(Asparagus gobicus)。种间竞争指数和总竞争指数与沙冬青冠幅之间的关系均近似服从幂函数关系,竞争强度随对象木冠幅的增加而减小。当对象木的冠幅小于1.0 m时,受到的竞争压力较大,所得的模型能很好地反映沙冬青受到的竞争强度。

关键词: 濒危植物, 沙冬青, 灌木, 种内和种间竞争, 竞争指数

Abstract:

In order to clarify the competitive influence of rare and endangered plant Ammopiptanthus mongolicus, this study selected the ecotone between A.mongolicus and Zygophyllum xanthoxylum, and used Hegyi single tree competition model to analyze the intraspecific and interspecific competition relationship by investigating 25 target trees of A.mongolicus. The results showed that intraspecific and interspecific competition intensity of A.mongolicus accounted for 5.09% and 94.91% of the total competition intensity(341.32), respectively, indicating that the competition of A. mongolicus was mainly derived from interspecific competition. There were many competing tree species of A.mongolicus in the ecotone, and the competition intensity from high to low was Artemisia xerophyticaCaragana brachypoda,Z.xanthoxylum,Oxytropis aciphyllaA.mongolicusReaumuria trigynaKrascheninnikovia ceratoidesReaumuria soongaricaPotaninia mongolicaAsparagus gobicus. The relationship of the interspecific competition index and the total competition index with the crown width of A.mongolicus was approximately subject to the power function relationship, and the competition intensity decreased with the increase of crown width of target trees. When the crown width of target trees was less than 1.0 m, the competitive pressure was greater, and the obtained model could well reflect the competitive intensity of A.mongolicus.

Key words: endangered plant, Ammopiptanthus mongolicus, shrub, intraspecific and interspecific competition, competition index

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