地学前缘 ›› 2024, Vol. 31 ›› Issue (5): 440-448.DOI: 10.13745/j.esf.sf.2024.2.11

• “综合生态系统碳循环与碳中和”专栏 • 上一篇    下一篇

滇南喀斯特地区不同石漠化程度下优势灌木生物量及分配特征

杨化菊1(), 李灿锋1, 杨克好1, 张熙璐1,2, 王传宇1, 王兴荣1, 何旭1, 彭雪峰1, 张连凯1,*()   

  1. 1.中国地质调查局 昆明自然资源综合调查中心/自然资源部自然生态系统碳汇工程技术创新中心, 云南 昆明 650100
    2.中国地质大学(武汉), 湖北 武汉 430074
  • 收稿日期:2023-08-18 修回日期:2024-01-29 出版日期:2024-09-25 发布日期:2024-10-11
  • 通信作者: * 张连凯(1981—),男,博士,研究员,主要从事自然生态系统碳循环研究工作。E-mail: zhang_liankai@126.com
  • 作者简介:杨化菊(1995—),女,硕士,助理工程师,主要从事自然资源碳汇研究工作。E-mail: huajuyang1@163.com
  • 基金资助:
    中国地质调查局地质调查项目(ZD20220135)

Biomass and distribution characteristics of dominant shrubs under varying degrees of rocky desertification in the karst region of southern Yunnan

YANG Huaju1(), LI Canfeng1, YANG Kehao1, ZHANG Xilu1,2, WANG Chuanyu1, WANG Xingrong1, HE Xu1, PENG Xuefeng1, ZHANG Liankai1,*()   

  1. 1. Kunming Natural Resources Comprehensive Investigation Center, China Geological Surve/Technology Innovation Center for Natural Ecosystem Carbon Sequestration Engineering, MNR, Kunming 650100, China
    2. China University of Geosciences (Wuhan), Wuhan 430074, China
  • Received:2023-08-18 Revised:2024-01-29 Online:2024-09-25 Published:2024-10-11

摘要:

灌木在喀斯特石漠化区植被恢复过程中具有重要作用,其生物量大小直接决定了石漠化修复与碳收支情况。为探究喀斯特地区优势灌木树种响应石漠化演替的生物量特征及分配格局,以滇南喀斯特地区不同石漠化程度下3种优势灌木树种华西小石积(Osteomeles schwerinae)、沙针(Osyris lanceolata)和车桑子(Dodonaea viscosa)为研究对象,通过分析其冠幅、树高、基径、各器官(根、茎、叶和花/果)生物量和根冠比等响应特征,并构建各器官、地上和总生物量的异速生长模型。结果表明:(1)不同石漠化梯度下,华西小石积和车桑子的平均生物量呈现“倒V”趋势,而沙针则与前两者不同;(2)不同石漠化梯度下,3种优势灌木各器官生物量的分配大小顺序为茎>根>叶>花/果;(3)3种灌木生物量估测效果较好的是线性函数和幂函数,最佳预测变量以基径(D)、基径平方和树高乘积(D2H)为主。本研究为喀斯特石漠化地区的植被恢复和生态系统碳收支功能的研究提供基础数据。

关键词: 喀斯特, 石漠化, 优势灌木, 生物量, 异速生长模型, 分配特征

Abstract:

Shrubs play a crucial role in vegetation restoration in karst rocky desertification areas, with their biomass directly influencing the restoration of rocky desertification and the carbon budget. To explore the biomass characteristics and distribution patterns of dominant shrub species in response to rocky desertification succession, this study focused on three dominant shrub species in the karst areas of southern Yunnan: Osteomeles schwerinae, Osyris lanceolata and Dodonaea viscosa. We analyzed their crown width, tree height, basal diameter, and the biomass of various organs (roots, stems, leaves, and flowers/fruits). The results showed that: (1) Under different rocky desertification gradients, the average biomass of Osteomeles schwerinae and Dodonaea viscosa exhibited an “inverted V” trend, while Osyris lanceolata showed a different pattern. (2) The order of biomass allocation among the organs of the three dominant shrubs under various rocky desertification gradients was: stems > roots > leaves > flowers/fruits. (3) The biomass estimation for the three shrubs was best described by linear and power functions, with the best predictive variables being basal diameter (D) and the product of basal diameter squared and tree height (D2H). This study provides fundamental data for vegetation restoration and ecosystem carbon budget research in karst rocky desertification areas

Key words: karst, rocky desertification, dominant shrubs, biomass, allometric model, distribution characteristics

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