摘要
在浙江省临安市选择典型天然次生灌丛,分别进行封禁和目标树抚育,探讨灌丛恢复为乔木林的可能性.结果表明:4年后,与未管护(对照)相比,封禁和目标树抚育后群落平均胸径分别提高1.3和2.6倍,平均高度分别提高0.5和1.1倍;目标树抚育林木出现了对照林分没有的4.5~8.5 cm径阶和4.5~8.5 m树高阶,形成了4 m高的新林层;灌木层物种丰富度和多样性指数没有因抚育而下降;封禁管理维持了群落的树种组成,遵循原有的演替方向;目标树抚育显著改变了群落的树种组成,提高了目的树种的重要值,近期有可能恢复成为针阔混交林群落.与封禁相比,目标树抚育在优势林木胸径和高度生长、树种组成改善等方面更能达到预想的目标.在有条件经营的情况下,可以选择目标树抚育模式对天然次生灌丛进行管理,从而达到加快群落恢复演替形成乔木林的目的.
The typical natural secondary shrub community was chosen in Lin＇ an of Zhejiang Pro- vince to discover its possibility of restoration to arbor forest with three kinds of forest management models being taken, i.e., no care as control, closed forest management and target tree tending. Over four years growth, compared with control, closed forest management significandy increased average DBH and height by 130% and 50%, respectively, while 260% and 110% for target tree tending. In target tree tending plots, larger trees had been emerging with 4.5-8.5 cm diameter class and 4.5-8.5 m height class and formed a new storey of 4 m compared with control. The species biodiversity indexes at shrub layer were significantly increased in closed management plots, and did not decrease in target tree tending plots. Closed forest management did not change the tree species composition, following its previous succession direction. However, target tree tending increased the importance value of target species with the high potential succession direction of mixed coniferous- broadleaved forest. The results revealed that the secondary shrub community with target tree tending achieved more desired goals on DBH improvement compared with closed managed and height growth management. when the operational conditions existed, of dominant trees and species composition If the secondary shrub community could be target tree tending model should be selected to accelerate the restoration of shrub toward arbor forest.
出处
《应用生态学报》
CAS
CSCD
北大核心
2017年第5期1414-1420,共7页
Chinese Journal of Applied Ecology
基金
国家科技支撑计划项目(2012BAD22B0503)资助~~
关键词
天然次生灌丛
群落结构
树种组成
树种多样性
目标树抚育
封禁管理
natural secondary shrubs
community structure
species composition
species diversi-ty
target tree tending
closed forest management.
作者简介
张慧，女，1994年生，硕士研究生．主要从事森林经理学研究．E-mail：1578033698@qq．com
通讯作者Correspondingauthor．E-mail：w_yixiang@126．com
