| 摘要: |
| 为提升森林生态系统的服务功能, 研究以深圳市田头山市级自然保护区桉树 Eucalyptus urophylla 人工林皆伐改造 3 a 的阔叶混交林为研究对象, 分析不同乡土树种配置模式下的林木个体生长特征、
生物多样性特征、 土壤理化特征以及森林生态系统碳储量的差异; 同时, 利用主成分分析, 对不同树种
配置模式进行综合评价。 结果表明, 不同树种配置模式下, 林木个体生长特征存在极显著差异 ( P <
0. 01), 不同配置模式的平均胸径介于 (3. 4±0. 2) ~ (8. 7±0. 7) cm 之间, 平均树高介于 (4. 4±0. 2) ~ (8. 8±
0. 5) m 之间。 不同模式下的生物多样性差异表明, 不同树种对物种入侵的竞争响应不同。 不同模式下土
壤理化特征存在一定差异; 不同树种配置模式下森林碳储量介于 122. 01~211. 28 t·hm
-2 之间, 均以土壤
层碳储量含量最高, 其次是植被层。 主成分分析提取了 6 个主成分, 可反映阔叶混交林改造模式 94. 9%的
变异性。 综合评价得分表明, 在该地区对桉树林进行皆伐改造时, 优化的树种组合模式为: (1) 大叶相
思 Acacia auriculiformis+荷木 Schima superba+梅叶冬青 Ilex asprella+台湾相思 A. confusa+山乌桕 Triadica
cochinchinensis; (2) 台湾相思+樟 Camphora officinarum+大叶相思+桃金娘 Rhodomyrtus tomentosa+米老排
Mytilaria laosensis; (3) 大叶相思+荷木+鸭脚木 Heptapleurum heptaphyllum+阴香 Cinnamomum burmanni+山
乌桕。 |
| 关键词: 桉树 皆伐改造 树种配置模式 综合评价 田头山市级自然保护区 |
| DOI： |
| 分类号: |
| 基金项目:广东省林业科技创新项目 (2021KJCX003), 广东省林业科研项目 (2023KYXM09), 广东省基础与应用基础研究基金项 目 (2023A1515030123), 国家林业和草原局林草科技创新平台运行补助项目 (2022132250, 2022132249) |
|
| Comprehensive Evaluation of Different Tree Species Configuration Modes in Clear-cutting and Transformation Eucalyptus urophylla Plantation in Tiantoushan Municipal Natural Reserve |
|
ZHAO Qing1, Zhang Jiao1, HE Liping1, YU Zhuan1, ZHOU Jiangle1, TAO Yuzhu2
|
|
1.Administration Center of Nature Reserves in Shenzhen,Shenzhen;2.Guangdong Provincial Key Laboratory of Silviculture,Protection and Utilization/Guangdong Academy of Forestry,Guangzhou
|
| Abstract: |
| To enhance the service capabilities of the forest ecosystem, the broad-leaved mixed forest after
three years of clear-cutting and transformation of Eucalyptus urophylla plantations in the Tiantoushan Municipal
Natural Reserve of Shenzhen was taken as the research object. It analyzed the differences in individual growth
characteristics, biodiversity features, soil physicochemical properties, and carbon storage of the forest ecosystem among various configuration modes of native tree species. Additionally, principal component analysis
(PCA) was employed to comprehensively evaluate the different tree species configuration modes. The results
showed that there were significant differences in the growth characteristics of individual trees under different tree
species configuration modes (P<0. 01). The average diameter at breast height (DBH) of different configuration modes ranged from (3. 4±0. 2) to (8. 7±0. 7) cm, and the average tree height ranged from (4. 4±0. 2) to
(8. 8±0. 5) m. The differences in biodiversity under different modes indicate that various tree species have distinct competitive responses to species invasion. There are some differences in soil physical and chemical characteristics under different models. The forest carbon storage under different tree species configuration modes
ranged from 122. 01 t·hm
-2
to 211. 28 t·hm
-2
, with the highest carbon storage content in the soil layer, followed by the vegetation layer. Six principal components were extracted by principal component analysis, which
could account for 94. 9% of the variability in the transformation pattern of broad -leaved mixed forests. The
comprehensive evaluation score showed that the optimal tree species combinations for the transformation are:
(1) Acacia auriculiformis+Schima superba+Ilex asprella+A. confusa+Triadica cochinchinensis; (2) A. confusa
+ Camphora officinarum + A. auriculiformis + Rhodomyrtus tomentosa + Mytilaria laosensis; and ( 3 )
A. auriculiformis+S. superba+Heptapleurum heptaphyllum+Cinnamomum burmanni+T. cochinchinensis. |
| Key words: Eucalyptus clear-cutting and transformation tree species configuration modes comprehensive evaluation Tiantoushan Municipal Natural Reserve |
