小径竹密度对雷公鹅耳枥幼苗早期更新的影响

董蓉; 黄慧敏; 向运蓉; 何丹妮; 陶建平

doi:10.11913/PSJ.2095-0837.2018.30362

小径竹密度对雷公鹅耳枥幼苗早期更新的影响

西南大学生命科学学院, 三峡库区生态环境教育部重点实验室, 重庆市三峡库区植物生态与资源重点实验室, 重庆 400715

基金项目:

国家自然科学基金项目（40106415）。

详细信息

作者简介:
董蓉(1992-),女,硕士研究生,研究方向为群落生态学(E-mail:dmdongrong@163.com)。

通讯作者:
陶建平,E-mail:taojp@swu.edu.cn

中图分类号: Q945
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出版历程
- 收稿日期: 2017-10-22
- 网络出版日期: 2022-10-31
- 发布日期: 2018-06-27

Effects of dwarf bamboo density on early seedling regeneration of Carpinus viminea Wall.

Key Laboratory of Eco-Environments in Three Gorges Reservoir Region, Chongqing Key Laboratory of Plant Ecology and Resources Research in Three Gorges Reservoir Region, School of Life Science, Southwest University, Chongqing 400715, China

Funds:

This work was supported by a grant from the National Natural Science Foundation of China (40106415).

摘要

摘要: 通过去除法控制竹丛密度，人为设置4种竹丛密度梯度[密度1：（3.83±0.53）株/m²；密度2：（16±1.80）株/m²；密度3：（39±1.69）株/m²；密度4：（69±2.15）株/m²]，测定不同密度竹丛下的微环境（包括土壤温度、湿度、电导率、凋落物厚度），研究竹丛密度及微环境对雷公鹅耳枥（Carpinus viminea Wall.）幼苗数量、存活动态、生长情况的影响。结果显示，竹丛密度对环境有显著影响，随着竹丛密度的增加，竹丛盖度、凋落物厚度、土壤温度升高明显；雷公鹅耳枥幼苗萌生量显著减少，4组密度梯度中幼苗数量分布依次排序为：密度1（28.53±3.14）株/m² > 密度2（17.36±1.45）株/m² > 密度3（12.36±0.93）株/m² > 密度4（8.92±0.93）株/m²，表明随着小径竹密度增加，其对雷公鹅耳枥幼苗萌发的抑制作用越强；小径竹的密集生长可对雷公鹅耳枥幼苗的存活率产生影响，且对幼苗的生长具有一定抑制作用。研究结果表明小径竹密集生长的环境不仅抑制了雷公鹅耳枥新生幼苗的分布和幼苗生长，还对种群的更新以及森林群落的演替产生一定的负面影响。
- 幼苗更新 /
- 幼苗生长 /
- 竹丛密度 /
- 紫耳箭竹 /
- 雷公鹅耳枥
Abstract: To investigate bamboo cluster control by removal, we established four density gradients of the dwarf bamboo (density 1: (3.83±0.53) ramet/m²; density 2: (16±1.80) ramet/m²; density 3: (39±1.69) ramet/m²; density 4: (69±2.15) ramet/m²) to determine different microenvironment measures (soil temperature, soil humidity, soil conductivity, and litter thickness) under different densities and clarify the influence of bamboo density and microenvironment on seedling number, seedling survival, and growth of dominant species Carpinus viminea. Results showed significant differences in environmental factors under different bamboo densities. With the increase in bamboo density, litter thickness, soil temperature, and soil moisture were significantly increased. In contrast, the number of seedlings of C. viminea significantly decreased, with the distribution of seedlings in the four population gradients ranked as: density 1 (28.53±3.14) ind/m² > density 2 (17.36±1.45) ind/m² > density 3 (12.36±0.93) ind/m² > density 4 (8.92±0.93) ind/m², indicating a stronger inhibitory effect on seedling germination with the increase in density. Thus, the density of the dwarf bamboo affected the survival rate and growth of C. viminea seedlings. Our results showed that dense dwarf bamboo not only inhibited seedling distribution and seedling growth of C. viminea, but also had a negative impact on population regeneration and succession of forest communities.
- Seedling regeneration /
- Seedling growth /
- Dwarf bamboo density /
- Fargesia decurvata J. L. Lu /
- Carpinus viminea Wall.

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参考文献(2)

[1]

Potter KM, Woodall CW. Trends over time in tree and seedling phylogenetic diversity indicate regional diffe-rences in forest biodiversity change[J]. Ecol Appl, 2012, 22(2):517-531.

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施引文献(5)

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