Acta Agrestia Sinica

Acta Agrestia Sinica ›› 2026, Vol. 34 ›› Issue (6): 2196-2206.DOI: 10.11733/j.issn.1007-0435.2026.06.022

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Community Structure and Modular Biomass Allocation Patterns of Seriphidium borotalense in Sagebrush Deserts at Different Degradation Gradients

FU Tian-hao1, LIU Xing-yi1,2, DONG Yi-qiang1,3,4, YAN An1,3,4, SONG Yong-kang1, YANG Chun-ying1, SAN Xing-yun1, LEI Ya-xin1, WU Kai1   

  1. 1. College of Grassland Science, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China;
    2. Bole Prairie Workstation, Bole, Xinjiang 833400, China;
    3. Xinjiang Key Laboratory of Grassland Resources and Ecology, Urumqi, Xinjiang 830052, China;
    4. Key Laboratory of Grassland Resources and Ecology of Western Arid Region, Ministry of Education, Urumqi, Xinjiang 830052, China
  • Received:2025-09-28 Revised:2026-01-23 Published:2026-06-02

不同退化程度蒿类荒漠草地群落结构与博乐绢蒿构件分配格局

符天昊1, 刘兴义1,2, 董乙强1,3,4, 颜安1,3,4, 宋勇康1, 杨春莹1, 单兴芸1, 雷雅欣1, 吴凯1   

  1. 1. 新疆农业大学草业学院, 新疆 乌鲁木齐 830052;
    2. 新疆博乐市草原工作站, 新疆 博乐 833400;
    3. 新疆草地资源与生态自治区重点实验室, 新疆 乌鲁木齐 830052;
    4. 西部干旱区草地资源与生态教育部重点实验室, 新疆 乌鲁木齐 830052
  • 通讯作者: 刘兴义,E-mail:284751536@qq.com
  • 作者简介:符天昊(2002-),汉族,新疆精河人,硕士研究生,主要从事草地资源与生态方向研究,E-mail:2292948573@qq.com
  • 基金资助:
    国家重点研发计划项目（2024YFD1300305）资助

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Abstract: In order to explore the response of sagebrush deserts grassland community structure and biomass component allocation pattern of Seriphidium borotalense to degradation under different degradation degrees， the plant community characteristics， plant community diversity index， species diversity characteristics， and modular biomass allocation patterns of S. borotalense desert grassland in undegraded （UD）， lightly degraded （LD）， moderately degraded （MD）， and highly degraded （HD） areas were measured and analyzed. It was found that with the increase of degradation degree， the community height， coverage and aboveground biomass decreased significantly， and the density increased significantly （P<0.05）. The Patrick index did not change， and the other diversity indexes decreased significantly. The height， coverage and aboveground biomass of S. borotalense decreased significantly （P<0.05）， and the density reached the maximum at LD， but no S. borotalense was found at HD. The distribution of stem and leaf components such as plant height， stem length and leaf weight decreased significantly （P<0.05）， and the distribution of root components such as root weight， root diameter and root weight ratio reached the maximum at LD. Redundancy analysis showed that community coverage was the most critical environmental factor driving the component allocation pattern of S. borotalensei. To sum up， S. borotalense responded to grassland degradation by optimizing the component allocation pattern， and the optimization threshold was between LD and MD.

Key words: Sagebrush desert, Plant community characteristics, Seriphidium borotalense, Modular biomass allocation patterns

摘要： 为探究不同退化程度下蒿类荒漠草地群落结构与博乐绢蒿构件分配格局对退化的响应，本研究以博乐绢蒿（Seriphidium borotalense）荒漠草地为对象，对未退化（UD）、轻度退化（LD）、中度退化（MD）和重度退化（HD）区群落数量特征、植物多样性、博乐绢蒿种群及构件特征进行测定分析，发现随退化程度增加，群落高度、盖度及地上生物量显著下降，密度显著升高（P<0.05），Patrick指数未见变化，其余植物多样性指数均显著下降；博乐绢蒿高度、盖度和地上生物量显著下降（P<0.05），密度于LD达最大值，HD未发现博乐绢蒿；博乐绢蒿株高、茎长、叶重等茎叶构件分配均显著下降（P<0.05），根重、根粗、根重比等根系构件分配均于LD达最大值；冗余分析表明，群落盖度是驱动博乐绢蒿构件分配格局的最关键环境因子。综上，博乐绢蒿通过调整构件分配格局以应对草地退化，且于LD、MD间存在耐受阈值。

关键词: 蒿类荒漠, 植物群落特征, 博乐绢蒿, 构件分配格局

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