生态环境学报 ›› 2021, Vol. 30 ›› Issue (7): 1360-1367.DOI: 10.16258/j.cnki.1674-5906.2021.07.004

• 研究论文 • 上一篇    下一篇

华南地区马占相思人工林不同改造模式对林分结构的影响

洪文君1,2(), 莫罗坚3, 张浩4,*()   

  1. 1.华南农业大学,广东 广州 510642
    2.三亚市林业科学研究院,海南 三亚 572000
    3.东莞市林业科学研究所,广东 东莞 523106
    4.香港高等教育科技学院,中国 香港 00852
  • 收稿日期:2021-02-02 出版日期:2021-07-18 发布日期:2021-10-09
  • 通讯作者: *张浩(1980年生),男,副教授,主要从事生态学研究。E-mail: allenzh@thei.edu.hk
  • 作者简介:洪文君(1990年生),女,工程师。E-mail: hongwenjun0827@126.com
  • 基金资助:
    广东省林业科技创新项目(2016KJCX018);东莞市国际科技合作(含港澳台)项目(2013508101020)

Effects of Different Thinning on the Structure of Acacia mangium Plantation in South China

HONG Wenjun1,2(), MO Luojian3, ZHANG Hao4,*()   

  1. 1. South China Agriculture University, Guangzhou 510642, China
    2. Forest Academy of Forestry, Sanya 572000, China
    3. Forest Research Institute of Dongguan, Dongguan 523106, China
    4. Technological and Higher Education Institute of Hong Kong, Hong Kong, China 00852, China
  • Received:2021-02-02 Online:2021-07-18 Published:2021-10-09

摘要:

研究间伐强度对华南地区人工林下套种阔叶树种生长的影响,为华南地区人工林营林措施和生态功能恢复评价提供科学依据。以东莞大岭山林场马占相思(Acacia mangium)人工林为研究对象,设置了3种间伐强度处理(0、30%和60%,编号为M1、M2和M3),间伐后均匀套种乡土阔叶树种,以不间伐不套种纯林为对照。改造10 a后,分析不同间伐强度与套种改造模式群落物种组成、物种多样性及林分生长状况的影响。结果表明,间伐套种模式改造10 a后,3种改造模式均显著促进群落乔木层的物种数(22—26种),林分灌木层物种数以M1模式较高,草本层物种数差异不大(14—17种);林分中乔木层、灌木层物种的Shannon-Wiener指数均以M1林分较高,分别为2.09和2.11,Pielou指数差异不大(0.83—0.96和0.90—1.02),草本层多样性指数以CK林分最高。DCA分析结果显示,绝大多数套种树种在改造后林分生长较好,密集分布在M1林分,M2和M3林分次之;间伐或套种处理均促进了幼树的生长,M1林分乔木层树种的平均树高、平均胸径和胸高断面积均显著高于间伐M2和M3林分。该研究结果表明马占相思人工林经营模式以未间伐与套种相结合为最佳,可优化群落林冠结构,加速林分向地带性森林植被阔叶树种混交林演替。

关键词: 马占相思, 间伐强度, 套种, 林下植被, 物种多样性, 生长

Abstract:

The thinning effect on the growth performance of replanting broad-leaved tree species in plantation in Southern China was analyzed, which could provide a better guidance and theoretical basis on the evaluation of plantation management strategies and ecological function restoration. Acacia mangium plantation in Daling Mountain, Dongguan City of South China was selected as the study site, and three thinning treatments (0, 30% and 60%, marked as M1, M2 and M3) and one control treatment without thinning and replanting (CK) were designed. After thinning treatments, native broad-leaved tree species were replanted in A. mangium plantation. The results showed that the number (22?26 species) of overstory layer species were significantly increased under three thinning treatments after 10 years’ generation and development in the plantation. The number of understory layer was the highest in M1. There was no significant difference on herbaceous layer (14?17) species. The Shannon index was the highest in M1 for both of overstory and understory layers, i.e. 2.09 and 2.11 respectively. There were not difference for the Shannon-Wiener index (0.83?0.96 and 0.90?1.02) in both layers, however, the Shannon index was the highest for the herbaceous layer in CK. Detrended Correspondence Analysis (DCA) ordination showed that the growth performance for most of replanted broad-leaved tree species was quite well, and they were most densely distribution in the plantation of M1, with the decreasing distribution in the plantations of M2 and then M3. The thinning treatment had a positive effort on the growth performance of replanted tree species. The average tree height, DBH and basal area of overstory layer in M1 were higher than those of M2 and M3. This study implicated that un-thinning (0%, M1) and interplanting with native tree species was the best management model for A. mangium plantation revegetation, which could improve community structure, and accelerate broad-leaved species forest vegetation succession.

Key words: Acacia mangium, thinning intensity, interplanting, understory, plant diversity

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