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应用生态学报 ›› 2021, Vol. 32 ›› Issue (2): 425-432.doi: 10.13287/j.1001-9332.202102.004

• 草地生态学专栏 • 上一篇    下一篇

呼伦贝尔草原植物叶片大小与数量的权衡关系及其内在机制

王鹤琪1,2, 宋彦涛3, 李强1, 范高华4, 王婷1, 周道玮1, 黄迎新1*   

  1. 1中国科学院东北地理与农业生态研究所, 吉林省草地畜牧重点实验室, 长春 130102;
    2中国科学院大学, 北京 100049;
    3大连民族大学环境与资源学院, 辽宁大连 116600;
    4中国科学院植物研究所, 北京 100093
  • 收稿日期:2020-04-29 接受日期:2020-10-16 出版日期:2021-02-15 发布日期:2021-08-15
  • 通讯作者: *E-mail: huangyx@iga.ac.cn
  • 作者简介:王鹤琪, 男, 1995年生, 硕士研究生。主要从事草地生态学研究。E-mail: wangheqi@iga.ac.cn
  • 基金资助:
    国家重点研发计划项目(2016YFC0500606)、中国科学院战略先导专项(XDA23060405)和吉林省科技发展计划项目(20190303066SF)资助

Trade-off relationship and internal mechanism of plant leaf size and number in Hulunbuir grassland, China

WANG He-qi1,2, SONG Yan-tao3, LI Qiang1, FAN Gao-hua4, WANG Ting1, ZHOU Dao-wei1 , HUANG Ying-xin1*   

  1. 1Jilin Provincial Key Laboratory of Grassland Farming, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China;
    2University of Chinese Academy of Sciences, Beijing 100049, China;
    3College of Environment and Bioresources, Dalian Minzu University, Dalian 116600, Liaoning, China;
    4Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
  • Received:2020-04-29 Accepted:2020-10-16 Online:2021-02-15 Published:2021-08-15
  • Contact: *E-mail: huangyx@iga.ac.cn
  • Supported by:
    National Key R&D Program of China (2016YFC0500606), the Strategic Priority Research Program of the Chinese Academy of Sciences (XDA23060405), and the Scientific and Technological Developing Scheme of Jilin Province(20190303066SF)

摘要: 叶片大小与数量的权衡关系是植物生长策略的基础,研究叶片大小与数量权衡关系的内在机制对于深刻理解植物生长策略具有重要意义。本研究以单个叶片干重表示叶大小,以单位茎上的叶片数量表示出叶强度,采用标准主轴回归分析方法研究呼伦贝尔草原植物叶片大小与数量的权衡关系以及内在机制。结果表明: 陈旗嵯岗(典型草原)和陈旗八一(草甸草原)叶片大小与出叶强度存在显著的负的等速生长关系,谢尔塔拉(草甸草原)的叶片大小与出叶强度存在显著的负的异速生长权衡关系。叶片大小和数量权衡关系的内在机制取决于叶片与茎生物量的分配机制以及茎组织密度的变化。

关键词: 叶大小, 出叶强度, 权衡关系, 生物量分配

Abstract: The trade-off between leaf size and number is the basis for plant growth strategies. It is of great significance to study the underlying mechanism of leaf size and number trade-offs for well understanding plant growth strategies. In this study, leaf size was expressed by the dry mass of single leaf, while leafing intensity was expressed by the number of leaves per unit stem volume. We used standardized major axis regression analysis method to examine the trade-off relationship between leaf size and number in Hulunbuir grassland. There was a significant negative isometric-growth trade-off between leaf size and number in Chenqicuogang (typical steppe) and Chenqibayi (meadow steppe). There was a significant negative allometric-growth trade-off between leaf size and number in Xeltala (meadow steppe). The underlying mechanism of the relationship between leaf size and number depended on the leaf and stem biomass allocation mechanism and the changes of the stem tissue density.

Key words: leaf size, leafing intensity, trade-off, biomass allocation