| 摘要: |
| 以广州市北部生态屏障区杉木 Cunninghamia lanceolata 近熟林为研究对象，通过分析其各层
次天然更新植物组成和多样性，探究人工林近自然改造提升技术。结果显示，该杉木林地带性树种天然
更新良好，累计有 57 种植物，其中乔木层 24 在、灌木层 35 种、草本层 11 种；灌木层植物多样性最高，
乔木层略低于草本层。乔木层中，杉木的占比和重要值分别为 29.55%、0.2136，平均树高和胸径在林分
中处于中等水平，从优势度和生长指标分析其处于竞争劣势；杉木主要处于林冠层和亚林冠层，林冠上
层无杉木，以地带性先锋树种和顶级树种为主，而且主林冠下均无杉木和先锋树种更新，以早期耐荫性
强的顶级树种为主，其中锥 Castanopsis chinensis、浙江润楠 Machilus chekiangensis、罗浮柿 Diospyros
morrisiana 等在林分占比和优势度高；林分已由杉木人工纯林自然演替为针阔混交林，并有进一步向地带
性常绿阔叶林演替的趋势。研究结果反映出该林分具备较强的天然更新能力和进展演替趋势，并与常见
典型杉木天然更新存在一定差异，这种差异可能与立地质量和树种适应性有关。 |
| 关键词: 杉木人工林 天然更新 植物多样性 近自然改造 |
| DOI： |
| 分类号: |
| 基金项目: |
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| Natural Regeneration of Chinese Fir Plantations in Hilly Areas of South China |
|
gouxiao1, mengshiyuan1, liweizhen1, hezhongjian1, huangjiuxiang2, liwei3, zhaozhigang1
|
|
1.Guangzhou Institute of Forestry and Landscape Architecture;2.College of Forestry and Landscape Architecture, South China Agricultural University;3.Baishuishan Forest Park of Guangzhou
|
| Abstract: |
| The plant composition and diversity among layers of near mature Chinese fir (Cunninghamia
lanceolata) plantation were explored in the northern ecological barrier area of Guangzhou city，which for
exploring near natural transformation and improving technology of plantations. The results showed that natural
regeneration of the zonal tree species were vigorously in this plantation, there are 57 species in the stand,
including 24 species in the arbor layer, 35 species in the shrub layer, and 11 species in the herb layer. The diversity
of shrub layer was the highest, and the arbor layer was slightly lower than the herb layer. In the arbor layer, the
proportion and importance value of Chinese ffr were 29.55% and 0.213 6 respectively, and its average tree height
and DBH were at the medium level in the stand. Therefore, which were at a competitive disadvantage according to the analysis of both dominance and growth indicators; C.lanceolata was mainly distributed in the main canopy
layer and sub-canopy layer, but not in the outer layer of the canopy, there were mainly zonal pioneer trees and
top trees species in this layer; while there were no C. lanceolata and pioneer trees under the canopy, which
were mainly top trees species with strong early shade tolerance; Among them, Castanopsis chinensis, Machilus
chekiangensis, Diospyros morrisiana, etc. had higher proportion and dominance in the stand. Therefore it were
inferred that the stand had changed from artificial pure Chinese fir plantation to mixed coniferous and broadleaved
forest, and which would be in trend of succession to zonal evergreen broad-leaved forest further. The
results showed that the plantation had strong natural regeneration potentiality and progressive succession trend,
which was different from the natural regeneration of typical Chinese ffr timber plantation, which may be related
to site quality and adaptability of tree species. These ffndings would provide a reference for the close-to-nature
management mode and technology selection of plantation in hilly areas in South China. |
| Key words: Chinese ffr plantation natural regeneration plant diversity close-to-nature management |
