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Forest and Grassland Resources Research >

2025 , Vol. 0 >Issue 6: 91 - 99

DOI: https://doi.org/10.13466/j.cnki.lczyyj.2025.06.009

Effects of stand spatial structure on above-ground biomass of Eucalyptus grandis×urophylla plantations

  • ZHAO Xingkui ,
  • HUANG Jinjun ,
  • HE Wen ,
  • YAO Yuefeng
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  • 1 College of Life Sciences, Guangxi Normal University, Guilin 541006, China
    2 Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences, Guilin 541006, China
    3 Guangxi Key Laboratory of Plant Conservation and Restoration Ecology inKarst Terrain, Guilin 541006, China

Received date: 2025-08-03

  Revised date: 2025-11-30

  Online published: 2026-04-17

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Abstract

This study elucidates the mechanisms through which stand spatial structure influences above-ground biomass(AGB)in Eucalyptus grandis×urophylla plantations,providing a theoretical basis for optimizing stand spatial structure and enhancing carbon sequestration capacity.Using Eucalyptus grandis×urophylla plantations aged from 2 to 7 years in Guangxi’s Huangmian State-owned Forest Farm.Stand spatial structure was characterized using the uniform angle index,size ratio,opening degree,and competition index.Backward stepwise regression and grey relational analysis were employed to identify key spatial structure factors influencing AGB accumulation across distinct growth stages.The regression model exhibited high explanatory power(R2=0.928).Size ratio,opening degree,and competition index showed significant negative correlations with AGB(P<0.05).Opening degree demonstrated the strongest inhibitory effect on AGB,evidenced by the largest absolute regression coefficient(-1480.402).Grey relational analysis further revealed dynamic age-dependent relationships between spatial structure factors and AGB changes.Early growth stages(2 to 3 years),uniform angle and size ratio exerted dominant influences on AGB.Pre-maturation stages,competition index emerged as the primary limiting factor.Opening degree maintained consistently high relevance across all stages,though its association with AGB exhibited non-monotonic fluctuations with stand age.To optimize resource utilization and AGB accumulation,optimize tree size hierarchy(size ratio)and spatial distribution(uniform angle)at early growth stages(2 to 3 years),implement thinning to alleviate competition pressure(competition index)at near-maturity stages(4 to 7 years),and sustain appropriate canopy openness(opening degree)throughout the rotation cycle.These stratified interventions provide a scientific basis for precision forestry aimed at carbon sequestration enhancement.

Key words： stand spatial structure; above-ground biomass(AGB); Eucalyptus grandis×urophylla plantations

Cite this article

ZHAO Xingkui , HUANG Jinjun , HE Wen , YAO Yuefeng . Effects of stand spatial structure on above-ground biomass of Eucalyptus grandis×urophylla plantations[J]. Forest and Grassland Resources Research, 2025 , 0(6) : 91 -99 . DOI: 10.13466/j.cnki.lczyyj.2025.06.009

References

[1] HAZANDY A, FATINNORLIYANA M, JOHAR M, et al. Allometric equation for above-ground biomass estimation of mixed mature mangrove forest[J]. Forests, 2022, 13(2):325.
[2] CHEN Xia, LUO Mingyu, LARJAVAARA M. Effects of climate and plant functional types on forest above-ground biomass accumulation[J]. Carbon Balance and Management, 2023, 18(1):5.
[3] FANG Xianfeng, TAN Wei, GAO Xiaoye, et al. Close-to-nature management positively improves the spatial structure of Masson pine forest stands[J]. Web Ecology, 2021, 21(1):45-54.
[4] 赵文菲, 曹小玉, 谢政锠, 等. 基于结构方程模型的杉木公益林林分空间结构评价[J]. 林业科学, 2022, 58(8):76-88.
[5] 胡雪凡, 张会儒, 段光爽, 等. 基于交角和密集度的竞争指数构建及评价[J]. 林业科学, 2021, 57(4):182-190.
[6] 张喜亭, 肖路, 王文杰. 大兴安岭落叶松林物种多样性和空间结构对生物量、土壤养分的影响[J]. 生态学报, 2025, 45(9):4276-4283.
[7] ZHANG Rui, LI Shuaifeng, HUANG Xiaobo, et al. Diversity-biomass relationships are shaped by tree mycorrhizal associations and stand structural diversity at different spatial scales[J]. Forest Ecosystems, 2024, 11:100234.
[8] 万盼. 经营方式对甘肃小陇山锐齿栎天然林林分质量的影响[D]. 北京: 中国林业科学研究院, 2018.
[9] 谯鹏, 唐丽玉, 黄洪宇, 等. 杉木林分冠层光环境模拟与生物量估算[J]. 中南林业科技大学学报, 2023, 43(7):141-148.
[10] PRIOR L D, BOWMAN D M J S. Across a macro-ecological gradient forest competition is strongest at the most productive sites[J]. Frontiers in Plant Science, 2014, 5:260.
[11] 方精云, 陈安平. 中国森林植被碳库的动态变化及其意义[J]. 植物学报, 2001, 43(9):967-973.
[12] 常新华. 长白山阔叶红松林生态系统管理研究[D]. 北京: 北京林业大学, 2009.
[13] 朱光玉, 徐奇刚, 吕勇. 湖南栎类天然次生林林分空间结构对灌木物种多样性的影响[J]. 生态学报, 2018, 38(15):5404-5412.
[14] SKIADARESIS G, LEBAN M J, SCHNABEL F, et al. Interacting and dynamic effects of species and structural diversity promote annual woody biomass production in a tropical tree diversity experiment[J]. Forest Ecology and Management, 2025, 593:122844.
[15] HUANG Xiang, ZHANG Yao, GENG Jianwei, et al. The effects of stand spatial structure on the aboveground biomass allocation in Chinese fir(Cunninghamia lanceolata)plantations[J]. Frontiers in Plant Science, 2025, 16:1599094.
[16] WENG Ensheng, DYBZINSKI R, FARRIOR E C, et al. Competition alters predicted forest carbon cycle responses to nitrogen availability and elevated CO2:simulations using an explicitly competitive,game-theoretic vegetation demographic model[J]. Biogeosciences, 2019, 16(23):4577-4599.
[17] BERZAGHI F, BRETAGNOLLE F, DURAND-BESSART C, et al. Megaherbivores modify forest structure and increase carbon stocks through multiple pathways[J]. Proceedings of the National Academy of Sciences, 2023, 120(5):e2201832120.
[18] 张煜星, 王雪军. 1973—2018年我国桉树人工林生产力及碳汇能力[J]. 林业科学, 2023, 59(3):54-64.
[19] 杜虎, 曾馥平, 王克林, 等. 中国南方3种主要人工林生物量和生产力的动态变化[J]. 生态学报, 2014, 34(10):2712-2724.
[20] HUANG Xiang, CHEN Yichen, TAN Hongru, et al. Extraction of the spatial structure of Chinese fir plantations stands based on unmanned aerial vehicle and its effect on AGB[J]. Forest Ecology and Management, 2024, 558:121800.
[21] 广西壮族自治区人民政府办公厅. 关于下达“十四五”期间年森林采伐限额的通知[EB/OL].(2021-04-01)[2025-06-20]. http://www.gxlyghy.com/uploadfile/2021/0725/20210725060147177.pdf.
[22] 全国森林资源标准化技术委员会. 主要树种龄级与龄组划分:LY/T2908—2017[S]. 北京: 中国标准出版社, 2017.
[23] 曹昊阳, 杜阿朋, 许宇星, 等. 尾巨桉人工林生物量分配格局的林龄效应及异速生长方程优化[J]. 浙江农林大学学报, 2024, 41(6):1124-1133.
[24] 惠刚盈, GADOW K V, 赵中华, 等. 结构化森林经营原理[M]. 北京: 中国林业出版社, 2016.
[25] 惠刚盈. 角尺度:一个描述林木个体分布格局的结构参数[J]. 林业科学, 1999, 35(1):39-44.
[26] 惠刚盈, VON G K, ALBERT M. 一个新的林分空间结构参数:大小比数[J]. 林业科学研究, 1999, 12(1):1-6.
[27] 张明辉, 尹昀洲, 王珂, 等. 水曲柳人工林空间结构特征对土壤养分含量的影响[J]. 北京林业大学学报, 2023, 45(9):73-82.
[28] 张俊鹏, 徐钊, 温小荣, 等. 杉木人工林林分空间结构分析及综合指数评价[J]. 西北林学院学报, 2024, 39(6):10-16.
[29] 李天宇, 贾炜玮, 孙毓蔓, 等. 基于地理加权回归模型的凉水自然保护区红松空间分布分析[J]. 森林工程, 2024, 40(2):47-59.
[30] 傅立. 灰色系统理论及其应用[M]. 北京: 科学技术文献出版社, 1992.
[31] KASSIER W H. Forest dynamics,growth and yield:From measurement to model[J]. Southern Forests:A Journal of Forest Science, 2011, 73(1):63-65.
[32] 谢贤胜, 苏宏新, 杨元征, 等. 基于地基激光雷达估测广西桉树人工林的林分参数[J]. 林业资源管理, 2022(2):100-108.
[33] FARRIOR C E, DYBZINSKI R, LEVIN S A, et al. Competition for water and light in closed-canopy forests:A tractable model of carbon allocation with implications for carbon sinks[J]. The American Naturalist, 2013, 181(3):314-330.
[34] 惠刚盈, 赵中华, 胡艳波, 等. 基于结构参数均值的林分空间结构综合评价研究[J]. 林业科学研究, 2023, 36(2):12-21.
[35] BINKLEY D, CAMPOE C O, GSPALTL M, et al. Light absorption and use efficiency in forests:why patterns differ for trees and stands[J]. Forest Ecology and Management, 2013, 288:5-13.
[36] FORRESTERI D. Linking forest growth with stand structure:tree size inequality,tree growth or resource partitioning and the asymmetry of competition[J]. Forest Ecology and Management, 2019, 447:139-157.
[37] 沈海龙, 丛健, 张鹏, 等. 开敞度调控对次生林林冠下红松径高生长量和地上生物量的影响[J]. 应用生态学报, 2011, 22(11):2781-2791.
[38] 王卓敏, 郑欣颖, 薛立. 樟树幼苗对干旱胁迫和种植密度的生理响应[J]. 生态学杂志, 2017, 36(6):1495-1502.
[39] POMMERENING A, ZHAO Z, GRABARNIK P. Considering allometric relationships in the analysis of spatial tree patterns[J]. Russian Journal of Ecosystem Ecology, 2018, 3(2):1-12.
[40] 张熙琳, 陈国齐, 刘春晓, 等. 基于林分空间结构调整的思茅松天然林碳增汇经营技术优化[J]. 西南林业大学学报(自然科学), 2024, 44(4):148-156.
[41] 汤孟平等. 森林空间结构分析[M]. 北京: 科学出版社, 2013.
[42] 万盼, 刘文桢, 刘瑞红, 等. 结构化经营对栎松混交林林分空间结构及稳定性的影响[J]. 林业科学, 2020, 56(4):35-45.
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