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间伐强度对马尾松人工林冠下套种树种生长的影响

陈贝贝 姜俊 陆元昌 刘宪钊 贾宏炎 明安刚 张显强

陈贝贝, 姜俊, 陆元昌, 刘宪钊, 贾宏炎, 明安刚, 张显强. 间伐强度对马尾松人工林冠下套种树种生长的影响[J]. 北京林业大学学报, 2021, 43(1): 58-65. doi: 10.12171/j.1000-1522.20200086
引用本文: 陈贝贝, 姜俊, 陆元昌, 刘宪钊, 贾宏炎, 明安刚, 张显强. 间伐强度对马尾松人工林冠下套种树种生长的影响[J]. 北京林业大学学报, 2021, 43(1): 58-65. doi: 10.12171/j.1000-1522.20200086
Chen Beibei, Jiang Jun, Lu Yuanchang, Liu Xianzhao, Jia Hongyan, Ming Angang, Zhang Xianqiang. Effects of thinning intensity on the growth of interplanting broadleaved trees under Pinus massoniana plantation[J]. Journal of Beijing Forestry University, 2021, 43(1): 58-65. doi: 10.12171/j.1000-1522.20200086
Citation: Chen Beibei, Jiang Jun, Lu Yuanchang, Liu Xianzhao, Jia Hongyan, Ming Angang, Zhang Xianqiang. Effects of thinning intensity on the growth of interplanting broadleaved trees under Pinus massoniana plantation[J]. Journal of Beijing Forestry University, 2021, 43(1): 58-65. doi: 10.12171/j.1000-1522.20200086

间伐强度对马尾松人工林冠下套种树种生长的影响

doi: 10.12171/j.1000-1522.20200086
基金项目: 国家自然科学基金项目(31901306)
详细信息
    作者简介:

    陈贝贝,助理研究员。主要研究方向:森林经理学。Email:chenbei@bjfu.edu.cn 地址:100083 北京市海淀区清华东路35号北京林业大学林学院

    责任作者:

    姜俊,助理研究员。主要研究方向:人工林经营及作业法设计。Email:jiang@bjfu.edu.cn 地址:同上

  • 中图分类号: S791.248

Effects of thinning intensity on the growth of interplanting broadleaved trees under Pinus massoniana plantation

  • 摘要:   目的  研究间伐强度对马尾松人工林冠下套种阔叶树生长的影响,为马尾松人工纯林向针阔混交林转化和阔叶树种潜在价值的开发提供科学依据。  方法  以广西凭祥马尾松人工林为研究对象,设置3种不同间伐强度(80%、50%和30%)的试验样地,间伐后冠下套种大叶栎、红锥、灰木莲、格木4种阔叶树,分析间伐强度对阔叶树胸径、树高和冠幅生长的影响,并利用相关分析检验影响套种树生长的关键因子。  结果  不同强度间伐9年后阔叶树的结构特征和生长状况存在显著差异,大叶栎和灰木莲的生长量随间伐强度的增大而增加,格木受采伐强度影响不显著。不同强度间伐后大叶栎的胸径、树高生长速度均为最快,且伐后3年就出现快速生长;红椎的冠幅生长在80%和50%强度增加较快,间伐5年后生长加快;格木在间伐后9年间生长最慢。相关性分析表明,马尾松林分密度、林下灌木盖度、土壤厚度和土壤有机质对套种阔叶树的生长均有显著影响。  结论  间伐后林分的生长空间和环境条件得到有效的改善,林下套种的阔叶树都出现了不同程度的快速生长,但也因间伐强度和树种特性的不同而产生差异,不同树种在中高强度的间伐下,生长速度更佳。在制定“间伐 + 套种”的经营措施时,应该考虑适当延长间伐间隔时间和树种生态学特性,马尾松人工林中高强度间伐(80%或50%)后,建议选用大叶栎、灰木莲进行冠下套种,发挥适应性强和生长迅速的优势,提升人工林的生态功能;低强度(30%)间伐后宜套种红椎和格木以培育长周期、高价值的大径材。

     

  • 图  1  马尾松林下套种阔叶树胸径生长变化

    Figure  1.  DBH growth changes of broadleaved trees interplanted under Pinus massoniana plantation

    图  2  马尾松林下套种阔叶树高生长变化

    Figure  2.  Tree height growth changes of broadleaved trees interplanted under Pinus massoniana plantation

    图  3  马尾松林下套种阔叶树冠长率变化

    Figure  3.  Crown length ratio changes of broadleaved trees interplanted under Pinus massoniana plantation

    图  4  马尾松林下4种套种阔叶树的结构指标与影响因子间的相关分析

    CD.郁闭度;TD.乔木密度;HC.草本盖度;SC.灌木盖度;ST.土壤厚度;LT.枯落物厚度;MW.含水量;OM.有机质;HT.腐殖质厚度;SD.林分密度;MD.平均胸径;MH.平均树高;MC.平均冠幅;Cafi.大叶栎;Cahy.红锥;Erfo.格木;Magl.灰木莲。*,**分别代表相关性达到显著(P < 0.05)和极显著(P < 0.01)水平。CD, canopy density; TD, tree density; HC, herbaceous coverage; SC, shurb coverage; ST, soil thickness; LT, litter thickness; MW, moisture content; OM, organic matter; HT, humus thickness; SD, stand density; MD, mean DBH; MH, mean tree height; MC, mean crown width; Cafi, Castanopsis fissa; Cahy, Castanopsis hystrix; Erfo, Erythrophleum fordii; Magl, Manglietia glauca. *, ** represent significant correlation at P < 0.05 and P < 0.01 level, respectively.

    Figure  4.  Correlation analysis between structural indexes and influencing factors of four interplanted broadleaved tree species under Pinus massoniana plantation

    表  1  马尾松样地基本概况表

    Table  1.   General situation of Pinus massoniana sample plots

    处理
    Treatment
    间伐强度
    Thinning
    intensity/%
    间伐前株数密度(株·hm−2)
    Pre-thinning density/
    (tree·ha−1)
    间伐后株数密度(株·hm−2)
    Post-thinning density/
    (tree·ha−1)
    平均胸径(2016)
    Average
    DBH (2016)/cm
    平均树高(2016)
    Average tree
    height (2016)/m
    高间伐 High thinning (HT)801 21524617.71 ± 0.1812.17 ± 0.14
    中间伐 Medium thinning (MT)501 20357917.45 ± 0.2211.54 ± 0.38
    低间伐 Low thinning (LT)301 17680417.31 ± 0.5311.36 ± 0.51
    下载: 导出CSV

    表  2  间伐后补植树种9年后结构特征

    Table  2.   Structural characteristics of replanting tree species under thinning treatment in the 9th year

    树种
    Tree species
    处理
    Treatment
    胸径
    DBH/cm
    树高
    Tree height/m
    平均冠幅
    Mean crown width/m
    密度(株·hm−2)
    Density/(tree·ha−1)
    存活率
    Survival rate/%
    大叶栎 Castanopsis fissaHT16.01 ± 0.41a14.82 ± 0.56a6.71 ± 0.72a48885.7
    MT14.14 ± 0.48ab13.26 ± 0.41ab6.57 ± 0.38a43358.7
    LT13.73 ± 0.63b13.11 ± 0.52b5.94 ± 0.49b42531.5
    红锥 Castanopsis hystrixHT8.46 ± 0.38a9.26 ± 0.47a6.04 ± 0.22ab41679.4
    MT8.11 ± 0.46a8.88 ± 0.41ab6.71 ± 0.31a39568.3
    LT7.96 ± 0.42b7.79 ± 0.32b5.27 ± 0.29b40227.2
    灰木莲 Manglietia glaucaHT9.46 ± 0.42a8.66 ± 0.38a5.14 ± 0.13a46377.6
    MT9.57 ± 0.58a8.78 ± 0.48a5.40 ± 0.26a43659.4
    LT9.13 ± 0.52b7.34 ± 0.40b4.71 ± 0.41a42268.2
    格木 Erythrophleum fordiiHT4.58 ± 0.23b6.12 ± 0.42b4.83 ± 0.37a32735.1
    MT4.93 ± 0.34a6.92 ± 0.35a4.98 ± 0.25a39346.7
    LT4.96 ± 0.21a6.01 ± 0.35b3.85 ± 0.19b43257.7
    注:同一树种不同小写字母代表差异显著(P < 0.05)。Note: different lowercase letters in the same tree species indicate significant differences (P < 0.05).
    下载: 导出CSV
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  • 收稿日期:  2020-03-30
  • 修回日期:  2020-05-09
  • 网络出版日期:  2021-01-14
  • 刊出日期:  2021-02-05

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