College of Tourism and Urban-Rural Planning, Chengdu University of Technology, Chengdu 610059, China.
Ecological Resources and Landscape Architecture Institute, Chengdu University of Technology, Chengdu 610059, China.
Ying Yong Sheng Tai Xue Bao. 2021 Mar;32(3):810-818. doi: 10.13287/j.1001-9332.202103.002.
To investigate the plant community characteristics of alpine cutting blanks under different restoration approaches, we conducted a field survey on cutting blanks experienced either natural restoration (40 years) or artificial restoration (30, 40 and 50 years) in western Sichuan, with natural forests as the reference. Our results showed that after 40 years natural succession, cutting blank was replaced by the secondary shrub of , while artificial restoration plantation was dominated by var. . The similarity indices between these communities and natural forests were low (0.19) and medium (0.28-0.49), respectively. Cutting blank through natural and artificial restoration had lower species diversity in the shrub layer but higher diversity in the herb layer than that of natural forests. With the increases of recovery time, total cross-sectional area at breast height, wood volume, index of species diameter class distribution, diversity indices, and similarity indices between plantations and natural forests gradually increased, while stand density gradually decreased. Compared with natural forests, plantations were facing with problems including high stand density, unreasonable structure, pure stands of cohorts and poor regeneration.
为了研究不同恢复方式下高山采伐迹地的植物群落特征，我们对川西经历自然恢复（40 年）和人工恢复（30、40 和 50 年）的采伐迹地进行了实地调查，以天然林为参照。结果表明，经过 40 年的自然演替，采伐迹地被次生灌丛 取代，而人工恢复林分则以 var. 为主。这些群落与天然林之间的相似性指数分别为低（0.19）和中（0.28-0.49）。与天然林相比，通过自然和人工恢复的采伐迹地灌木层的物种多样性较低，但草本层的多样性较高。随着恢复时间的增加，林分的总胸径面积、木材蓄积量、径级分布指数、多样性指数和与天然林的相似性指数逐渐增加，而林分密度逐渐降低。与天然林相比，林分面临着林分密度高、结构不合理、林分纯林和更新不良等问题。
