Effects of natural and artificial restoration on plant community characteristics of alpine cutting blank in Western Sichuan, China

doi:10.13287/j.1001-9332.202103.002

Abstract

Abstract: 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 Spiraea alpina, while artificial restoration plantation was dominated by Picea likiangensis var. rubescens. 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.

Key words: cutting blank, natural restoration, plantation, community structure, species diversity

XU Qian, SHI Song-lin, JIA Long-yu, BAI Hai, CAO Ji-xin, WANG Guo-yan, PENG Pei-hao. Effects of natural and artificial restoration on plant community characteristics of alpine cutting blank in Western Sichuan, China[J]. Chinese Journal of Applied Ecology, 2021, 32(3): 810-818.

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