松栎混交林天然更新对间伐强度和环境因子的响应  

Response of Natural Regeneration of Pinus massoniana and Quercus variabilis Mixed Forest to Thinning Intensity and Environmental Factors

作　　者：郭诗宇 宋德凯 徐自警[1] 陈士云 陈泽燕 杜澎 汪洋[1] GUO Shiyu;SONG Dekai;XU Zijing;CHEN Shiyun;CHEN Zeyan;DU Peng;WANG Yang(Hubei Ecology Polytechnic College,Wuhan 430200,China;Huashanzhai Forest Farm of Zhongxiang City,Zhongxiang,Hubei 431900,China)

机构地区：[1]湖北生态工程职业技术学院,武汉430200 [2]钟祥市花山寨林场,湖北钟祥431900

出　　处：《Journal of Resources and Ecology》2023年第2期423-432,共10页资源与生态学报（英文版）

基　　金：The Key Forestry Research Project Sponsored by Sino-German Financial Cooperation(zdczhz2021ky09);The Key Forestry Research Project Sponsored by Sino-German financial cooperation(zdczhz2019ky01);The Forest Sustainable Management Project Sponsored by Sino-German Financial Cooperation in Southern China(Hubei Province)(BMZ ID 200665778).

摘　　要：基于目标树经营,研究不同间伐强度和环境因子对马尾松栓皮栎混交林天然更新的影响,为马尾松栎类混交林天然更新和可持续森林经营提供理论依据。以间伐后的马尾松栓皮栎混交林为对象,选择3种平均间伐强度林分布设5 m×5 m样方,即弱度间伐WT(7.6%)、轻度间伐LT(15.3%)、中度间伐MT(24.3%),每种强度7–10次重复,对照3次重复。3年后调查并分析不同间伐强度天然更新数量、生长高度、更新密度、更新物种多样性及其影响因素。结果表明:(1)间伐3年后样方内共有更新维管束植物32种,隶属于22科30属;更新优势种以乔木物种为主;更新物种数随间伐强度增大而增加。(2)随间伐强度增大天然更新林木在不同高度级的数量相应增多;不同高度级林木的更新密度随间伐强度增大而增加。(3)随间伐强度增大,其丰富度、均匀度、本质多样性均有所增加,而Shannon-Weiner指数和Simpson指数无明显变化趋势。(4)坡度、坡向、坡位和间伐强度对物种丰富度、均匀度和更新密度有显著影响。中度间伐对天然更新和物种多样性具有最佳促进效应;增大间伐强度可促进马尾松栓皮栎混交林天然更新和更新物种的多样性。坡向和坡位值升高可促进天然更新物种的丰富度和物种多样性,坡度增大对天然更新物种丰富度和多样性有明显的负作用。Based on target tree management,the effects of different thinning intensities and environmental factors on the natural regeneration of a Pinus massoniana and Quercus variabilis mixed forest were explored in order to provide a theoretical basis for the natural regeneration and sustainable forest management of P.massoniana and Quercus L.mixed forests.Taking the mixed forest after thinning as the research object,three average thinning intensities of WT(7.6%)for weak thinning,LT(15.3%)for light thinning,and MT(24.3%)for moderate thinning were carried out in 5 m×5 m quadrats with 7–10 replicates for each intensity level and 3 replicates for the control.Three years after the thinning,the amount of natural regeneration,growth height,regeneration density,diversity of regenerated tree species and their influencing factors at different thinning intensities were measured and analyzed.The results indicated four main features of the subsequent regeneration.(1)There were 32 species of vascular plants in the 28 quadrats 3 years after thinning,belonging to 22 families and 30 genera,and the dominant species for regeneration were arbor species.The number of regeneration species increased with increasing thinning intensity.(2)As thinning intensity increased,the number of natural regeneration plants between various height classes rose;so,the increased thinning intensity promoted the density of different height classes during regeneration.(3)As thinning intensity increased,so did species abundance S and species evenness.The degree and intrinsic diversity increased,while the Shannon-Weiner and Simpson indices showed no discernible trends.(4)Slope,aspect,and slope position,as well as thinning intensity,all had significant impacts on species richness,species evenness,and regeneration density.MT has the most appropriate promoting effect on natural regeneration and species diversity,so increased thinning intensity can promote natural regeneration and species diversity in the P.massoniana and Q.variabilis mixed forest.In addition,aspect

关 键 词：间伐强度 马尾松栓皮栎混交林 天然更新 环境因子 多样性 

分 类 号：S718.5[农业科学—林学]