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作 者:李兴瑞 Li Xingrui(Agricultural and Rural Development Service Center,Gucheng Town,Zhenyuan Yi,Hani,Lahu Autonomous County,Pu'er 666502,Yunnan,China)
机构地区:[1]普洱市镇沅彝族哈尼族拉祜族自治县古城镇农业农村发展服务中心,云南镇沅666502
出 处:《绿色科技》2025年第5期119-121,126,共4页Journal of Green Science and Technology
摘 要:本研究旨在探究不同强度抚育采伐对森林植物多样性的影响规律,为森林经营管理提供科学依据。以云南省普洱市8年生杉木-木荷混交林为研究对象,通过设置20%、30%、40%3个采伐强度处理和空白对照,采用Simpson指数、Marglef指数、Shannon-Wiener指数和Pielou均匀度指数评价植物多样性,分析不同采伐强度下植物多样性的动态变化。结果表明:短期内(2016年),较高强度采伐促进了物种丰富度提高,各处理间Simpson指数、Shannon-Wiener指数和Pielou均匀度指数无显著差异;长期来看(2023年),40%采伐强度处理的各项多样性指数显著低于其他处理,20%~30%采伐强度处理则维持了较高的物种多样性水平。适度的抚育采伐(20%~30%)有利于维持森林植物多样性,而过度采伐(40%)可能导致多样性显著下降,建议在该类型森林经营中采用20%~30%的采伐强度。This study aims to explore the impact of different intensities of nurturing and logging on forest plant diversity,and provide scientific basis for forest management.The 8-year-old mixed forest of Cunninghamia lanceolata and Schima superba in Pu'er City,Yunnan Province was selected as the research object.Three harvesting intensities of 20%,30%,and 40%were set up,and a blank control was used to evaluate plant diversity.Simpson index,Marglef index,Shannon Wiener index,and Pielou evenness index were used to analyze the dynamic changes of plant diversity under different harvesting intensities.In the short term(2016),high-intensity logging promoted an increase in species richness,with no significant differences in Simpson index,Shannon Wiener index,and Pielou evenness index among the treatments;in the long run(2023),the diversity indices of the 40%logging intensity treatment are significantly lower than those of other treatments,while the 20%~30%logging intensity treatment maintains a high level of species diversity.Moderate nurturing logging(20%~30%)is beneficial for maintaining forest plant diversity,while excessive logging(40%)may lead to a significant decrease in diversity.It is recommended to adopt a logging intensity of 20%~30%in this type of forest management.
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