植物生态学报 ›› 2024, Vol. 48 ›› Issue (4): 459-468.DOI: 10.17521/cjpe.2023.0032  cstr: 32100.14.cjpe.2023.0032

• 研究论文 • 上一篇    下一篇

落叶松径向生长和生物量分配对气候变暖的响应

梁逸娴, 王传宽, 臧妙涵, 上官虹玉, 刘逸潇, 全先奎*()()   

  1. 东北林业大学生态研究中心, 森林生态系统可持续经营教育部重点实验室, 哈尔滨 150040
  • 收稿日期:2023-02-06 接受日期:2023-05-19 出版日期:2024-04-20 发布日期:2024-05-11
  • 通讯作者: * (quanxiankui@nefu.edu.cn)
  • 基金资助:
    国家重点研发计划(2021YFD220040107);中央高校基本科研业务费专项(2572020BA04)

Responses of radial growth and biomass allocation of Larix gmelinii to climate warming

LIANG Yi-Xian, WANG Chuan-Kuan, ZANG Miao-Han, SHANGGUAN Hong-Yu, LIU Yi-Xiao, QUAN Xian-Kui*()()   

  1. Center for Ecological Research, Ministry of Education Key Laboratory of Sustainable Forest Ecosystem Management, Northeast Forestry University, Harbin 150040, China
  • Received:2023-02-06 Accepted:2023-05-19 Online:2024-04-20 Published:2024-05-11
  • Contact: * (quanxiankui@nefu.edu.cn)
  • Supported by:
    National Key R&D Program of China(2021YFD220040107);Fundamental Research Funds for the Central Universities(2572020BA04)

摘要:

研究气候变暖对树木径向生长和生物量分配的影响, 对准确评价气候变化背景下树木的固碳能力具有重要意义。该研究于2004年将4个纬度地点(从北往南依次为塔河、松岭、黑河和带岭)的落叶松(Larix gmelinii)幼树向南移植到黑龙江帽儿山森林生态研究站的同质园内, 模拟气候暖化。在同质园和移栽来源地同步测定树木径向生长和生物量及其分配。结果表明: (1)气候变暖显著促进了松岭和塔河落叶松树木的径向生长, 胸径(DBH)、树干距离地面10 cm处直径(D10)及其相对增长率和单位增温相对增长率均随增温幅度的增加而增大; 松岭和塔河树木DBH的相对增长率分别为58.62%和101.49%, 单位增温相对增长率分别为16.11%·℃-1和18.79%·℃-1。(2)气候变暖显著减小了塔河树木叶、枝和根生物量的占比, 增大了树干和地上生物量的占比; 气候变暖也显著减小了松岭树木根生物量占比, 增大了树干生物量占比。气候变暖后, 松岭和塔河树木根冠比均显著减小。气候变暖会影响落叶松树木的径向生长和生物量的分配, 且这种影响因暖化程度的不同而存在一定的差异。

关键词: 气候变化, 落叶松, 移栽试验, 胸径, 生物量分配

Abstract:

Aims Studying the impact of climate warming on radial growth and biomass allocation of trees is crucial for accurately evaluating the carbon sequestration capacity of trees under climate change.
Methods In 2004, the seedlings of Larix gmelinii from four different locations (i.e., Tahe, Songling, Heihe and Dailing from north to south) were transplanted southward to a common garden at Mao’ershan Forestry Research Station in Heilongjiang Province to simulate climate warming. The radial growth and biomass allocation of trees in common garden and original sites were measured simultaneously.
Important findings Warming treatment significantly increased the radial growth of trees from Songling and Tahe sites. The stem diameter at breast height (DBH), diameter at 10 cm from the ground (D10), relative increasing rate of DBH and D10, and relative increasing rate per warming unit of DBH and D10 increased with the increasing warming degree. The relative increasing rate of DBH for Songling and Tahe sites were 58.62% and 101.49%, and the relative increasing rate per warming unit were 16.11%·°C-1 and 18.79%·°C-1, respectively. Warming treatment significantly decreased the proportion of leaf, branch and root biomass and increased the proportion of stem, aboveground biomass of trees from Tahe site. The proportion of root biomass significantly decreased and the proportion of stem biomass increased for the trees from Songling site under warming treatment. The root-shoot ratio significantly decreased for the trees from Songling and Tahe sites under warming treatment. Climate warming can affect the radial growth and biomass allocation of L. gmelinii, and this effect varied with the degree of warming.

Key words: climate change, Larix gmelinii, transplanting experiment, diameter at breast height, biomass allocation