欢迎访问《应用生态学报》官方网站,今天是 分享到:

应用生态学报 ›› 2026, Vol. 37 ›› Issue (1): 15-23.doi: 10.13287/j.1001-9332.202601.001

• 研究论文 • 上一篇    下一篇

疏伐强度对华北落叶松人工林自然更新的影响

王云霓1,2, 曹恭祥1, 徐丽宏3*, 吴秀花1, 阿丽日苏1, 黄卫丽1,2, 郭烨1   

  1. 1内蒙古自治区林业科学研究院, 呼和浩特 010010;
    2沙地生物资源保护与培育国家林业和草原局重点实验室, 呼和浩特 010010;
    3中国林业科学研究院森林生态环境与自然保护研究所, 北京 100091
  • 收稿日期:2025-08-13 修回日期:2025-11-01 发布日期:2026-07-18
  • 通讯作者: *E-mail: xulh@caf.ac.cn
  • 作者简介:王云霓, 女, 1987年生, 博士, 副研究员。主要从事生态水文及森林经营研究。E-mail: yunni5186@126.com
  • 基金资助:
    国家自然科学基金项目(32171559)、内蒙古自治区林业科学研究院科研能力提升“揭榜挂帅”项目(2024NLTS04)和内蒙古自治区关键技术攻关计划项目(2021GG0033)

Effects of thinning intensities on natural regeneration of Larix principis-rupprechtii plantations

WANG Yunni1,2, CAO Gongxiang1, XU Lihong3*, WU Xiuhua1, A Lirisu1, HUANG Weili1,2, GUO Ye1   

  1. 1Inner Mongolia Academy of Forestry, Hohhot 010010, China;
    2Key Laboratory of Sandy Land Biological Resources Conservation and Cultivation of National Forestry and Grassland Administration, Hohhot 010010, China;
    3Ecology and Nature Conservation Institute, Chinese Academy of Forestry, Beijing 100091, China
  • Received:2025-08-13 Revised:2025-11-01 Published:2026-07-18

摘要: 以内蒙古大青山不同疏伐强度(0~90%)改造20年后的华北落叶松人工林为研究对象,于2023年和2024年的生长季调查更新幼苗和幼树状况,基于结构方程模型揭示疏伐影响华北落叶松人工林自然更新的机制。结果表明: 华北落叶松人工林更新苗的密度、频度及幼树率随疏伐强度增大而显著增加;疏伐不仅直接促进自然更新,也通过改善林内光环境与枯落物状况间接促进自然更新。各因子对自然更新的影响依次为:疏伐强度(标准化总影响系数为0.822)>郁闭度(-0.771)>枯落物厚度(-0.527)>林下总光照(0.424)>枯落物蓄积量(-0.421)>草本植物盖度(-0.288)>树高(0.119)>土壤水分(0.092)。从促进自然更新和稳定群落结构的角度出发,建议进行不低于40%强度的疏伐,郁闭度调整到0.50~0.60,并适时清除过厚枯落物。

关键词: 林分改造, 疏伐强度, 自然更新, 林内光照, 枯落物厚度

Abstract: We investigated the natural regeneration of larch (Larix principis-rupprechtii) plantations in Daqing Mountains of Inner Mongolia during the growing seasons of 2023 and 2024, which were thinned at different intensities (0-90%) 20 years ago. We elucidated the mechanisms of thinning affects on natural regeneration of larch plantations by structural equation model. The results showed that the density and frequency of natural regeneration seedlings and the sapling ratio increased significantly with increasing thinning intensity. Thinning directly promoted natural regeneration, and indirectly facilitated it by improving the understory light environment and litter conditions. The factors influencing natural regeneration in descending order of standardized total effect coefficients were: thinning intensity (0.822) >canopy closure (-0.771) >litter thickness (-0.527) >total understory light (0.424) >litter accumulation (-0.421) >herbaceous plant cover (-0.288) >tree height (0.119) >soil moisture (0.092). From the perspective of promoting natural regeneration and stabilizing community structure, we recommend to conduct thinning at an intensity of no less than 40%, adjust canopy closure to 0.50-0.60, and timely remove excessive litter.

Key words: stand improvement, thinning intensity, natural regeneration, understory light, litter thickness