摘要
该试验通过对近自然改造7a的马占相思人工林、对照林分的生长更新情况和物种多样性进行研究,分析探讨马占相思人工林近自然改造的初步效果。结果表明:近自然改造后,试验林分乔木层平均胸径、树高年生长量、林分密度年增长量均高于对照林分,试验林分乔木层Shannon-Wiener指数、Simpson指数和Pielou的均匀度指数均显著高于对照林分。试验林分灌木层平均胸径、树高年生长量、林分密度年增长量与对照林分无显著性差异,Shannon-Wiener指数、Simpson指数和Pielou的均匀度指数均显著高于对照林分。因此,近自然改造促进了马占相思人工林下乡土树种的更新和生长,使林分乔木层生长更新加快,物种多样性增加;灌木层更新种类增多,物种多样性增加。
In this experiment,the growth,regeneration and species diversity of Acacia mangium plantations and control stands that have been Close-to-Nature management for 7 years were studied,and the preliminary effects of the near natural transformation of Acacia mangium plantations were analyzed and discussed.The results showed that:after Close-to-Nature management,the mean density,DBH,heigh in arborous layer of the experiment forests were higher than the control group.The Shannon-Wiener index,Simpson index,Pielou’s evenness index were significantly higher than the control group.It can be seen that the Close-to-Nature management can promote the growth and regeneration of indigenous trees under the Acacia mangium plantation,expedite the growth and regeneration,increase the diversity of arborous layer.and increase the species,improve the diversity of undergrowth shrub layer.
作者
彭文成
杨佳
黄士绮
王如
段左俊
Peng Wencheng;Yang Jia;Huang Shiqi;Wang Ru;Duan Zuojun(Hainan Academy of Forestry(Hainan Academy of Mangrove),Haikou Hainan 571100)
出处
《热带林业》
2022年第4期13-17,共5页
Tropical Forestry
基金
海南省林业科学研究院(海南省红树林研究院)基础性科研工作(KYYS-2021-04):海南重点生态地区外来树种人工林更新关键技术研究
省属科研院所技术创新专项(jscx202019):海南马占相思和杉木人工林近自然改造关键技术研究。
关键词
马占相思人工林
近自然改造
生长更新
物种多样性
Acacia mangium plantation
Close-to-Nature management
Growth and regeneration
Species diversity
