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应用生态学报 ›› 2023, Vol. 34 ›› Issue (8): 2039-2046.doi: 10.13287/j.1001-9332.202308.026

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华北落叶松人工林林隙大小对其更新的影响

赵怡, 李福明, 朱景康, 常晨隆, 冯泳翰, 梁文俊, 魏曦*   

  1. 山西农业大学林学院, 山西晋中 030801
  • 收稿日期:2023-05-05 接受日期:2023-06-21 出版日期:2023-08-15 发布日期:2024-02-15
  • 通讯作者: *E-mail: weixi860826@163.com
  • 作者简介:赵 怡, 女, 1997年生, 硕士研究生。主要从事水土保持和林业生态研究。E-mail: zhaoyi97845@163.com
  • 基金资助:
    国家自然科学基金项目(31971644,31901365)、国家重点研发计划项目(2022YFF1300401)、山西省高等学校科技创新项目(2021L105)、山西省优秀博士来晋工作奖励资金科研项目(SXYBKY2018032)和山西农业大学科技创新基金项目(2018YJ09)

Effect of gap size on the regeneration in Larix principis-rupprechtii plantation

ZHAO Yi, LI Fuming, ZHU Jingkang, CHANG Chenlong, FENG Yonghan, LIANG Wenjun, WEI Xi*   

  1. College of Forestry, Shanxi Agricultural University, Jinzhong 030801, Shanxi, China
  • Received:2023-05-05 Accepted:2023-06-21 Online:2023-08-15 Published:2024-02-15

摘要: 对关帝山华北落叶松人工林20个林隙的幼苗(高度<1 m)、幼树(高度≥1 m,胸径<5 cm)进行调查,分析4个面积林隙等级(<60 m2、60~120 m2、120~180 m2、≥180 m2)下华北落叶松幼苗和幼树的更新密度、生长指标和空间分布。结果表明: 在不同面积的林隙等级中,幼苗、幼树的生长指标(基径、高度)和幼苗更新密度均在小林隙(14~60 m2)下最好,幼树更新密度在中林隙(60~120 m2)下最大,且同等级面积林隙下幼树密度均大于幼苗密度。华北落叶松幼苗、幼树在小林隙和中林隙下更新状况良好,大林隙(120~180 m2)和特大林隙(≥180 m2)则不利于华北落叶松更新。华北落叶松幼苗、幼树主要分布在林冠投影区域以及林冠空隙区域的边缘。通过补种或间伐等人工干扰手段将林隙面积控制在14~120 m2,可以促进华北落叶松的更新。

关键词: 核密度估计, 空间结构, 林隙, 华北落叶松更新

Abstract: We conducted a survey on seedlings (height <1 m) and saplings (height ≥1 m, diameter at breast height <5 cm) in 20 gaps of Larix principis-rupprechtii plantations on Guandi Mountains, Shanxi to analyze regene-ration density, growth indicators, and spatial distribution of L. principis-rupprechtii seedlings and saplings under four gap sizes (<60 m2, 60-120 m2, 120-180 m2, and ≥180 m2). The results showed that growth indicators (ground diameter, height) of seedlings and saplings and regeneration density of seedlings were highest in small gaps (14-60 m2). The sapling regeneration density was highest in medium gaps (60-120 m2), and sapling density exceeded seedling density in each size category. L. principis-rupprechtii seedlings and saplings exhibited favorable regeneration in small and medium gaps, while large gaps (120-180 m2) and extra-large gaps (≥180 m2) were unfavorable for L. principis-rupprechtii regeneration. L. principis-rupprechtii seedlings and saplings were mainly distributed within the canopy projection area and along the edge of canopy gap area. Controlling gap size within the range of 14-120 m2 through artificial interventions, such as planting and thinning, could promote the regeneration of L. principis-rupprechtii.

Key words: kernel density estimation, spatial structure, expanded gap, regeneration of Larix principis-rupprechtii.