林业科学研究2025，Vol.38Issue(2)：12-22,11.DOI:10.12403/j.1001-1498.20240130
落叶松云冷杉针叶混交林间伐后林木碳生长动态变化
Dynamic Changes in Tree Carbon Growth after Thinning in a Mixed Forest of Larch-spruce-fir
摘要
Abstract
[Objective]This study aims to determine the contribution of tree species groups or individual trees to the growth of forest carbon storage and to analyze their dynamic changes in response to thinning intensity and post-harvest recovery periods.The goal is to provide scientific guidelines for developing ra-tional thinning strategies to enhance forest carbon sequestration.[Methods]Sixteen fixed plots of larch-spruce-fir mixed coniferous forests located in Jingouling Forest Farm,Jilin Province,were selected for this study.Periodic surveys were carried out on these plots,which underwent thinning at four different intensit-ies(TI):light(20%BA removed),moderate(30%),heavy(40%)and a control(0%).An analytical framework combining growth dominance and an asymmetric competition-based model of tree carbon storage growth was applied.This analytical framework assessed the contributions of different tree species groups or indi-vidual trees to the carbon sequestration of the remaining stand under varying thinning intensities and eval-uated their dynamic changes over time.[Results]Growth dominance in unthinned plots increased with stand age.However,in thinned plots,growth dominance decreased with increasing thinning intensity but gradually recovered over time post-thinning.Light thinning enhanced the ability of larger trees to absorb belowground resources,while moderate and heavy thinning increased light availability,benefiting under-story saplings and promoting their carbon growth.Moreover,with greater thinning intensity,the carbon growth of shade-intolerant species in the understory exceeded their allometric growth expectations.Among these,Larix species contributed more to stand carbon sequestration than shade-tolerant associated spe-cies,particularly medium to large Larix trees.[Conclusion]Bottom-up thinning redistributed resources among remaining trees,allowing previously suppressed trees to achieve faster growth.The analytical framework employed in this study identified shade-intolerant Larix as strong contributors to stand carbon sequestration post-thinning,whereas shade-tolerant conifers or broadleaf species were weaker contribut-ors.These findings provide valuable insights into tree prioritization during thinning and suggest potential pathways for forest succession.In the study,removing weaker contributors not only enhances stand car-bon sequestration but also facilitates the transition from a Larix-dominated forest to a mixed Picea-Abies coniferous forest under moderate to high-intensity thinning regimes.关键词
林分生长优势度/间伐/温带针叶混交林/异速生长期望/林分碳储量生长动态Key words
stand growth dominance/thinning/temperate mixed forest/tree-level allometric expectation/dynamics of stand carbon growth分类
农业科技引用本文复制引用
刘太艳,罗光成,卢军,李晨,朱怀远,向玮..落叶松云冷杉针叶混交林间伐后林木碳生长动态变化[J].林业科学研究,2025,38(2):12-22,11.基金项目
"十四五"国家重点研发计划(2022YFD2200502-04) （2022YFD2200502-04）
国家自然科学基金(32160366) （32160366）
