摘要
以川东低山区29年生马尾松人工林为对象,研究了不同间伐强度(0、10%、20%、30%、40%、50%)处理1年后林下植被群落物种组成与多样性分异特征初期响应。结果表明:各间伐处理均能降低草本植物芒、芒萁的优势地位,而各处理灌木的优势物种组成较复杂,中等间伐强度(20%、30%、40%)处理泛化种较其他处理明显增多。各多样性指数随间伐强度增高呈现先增后降的变化趋势,草本植物较灌木的分异性更强,且各指数与土壤含水量均呈显著正相关。间伐强度与土壤理化性质对群落分异解释量为81%,中等间伐强度林下植被群落除全磷外与其他因子表现出正相关关系。间伐初期草本植物群落较灌木群落更能积极响应干扰;40%间伐强度处理与土壤环境因子关系紧密,群落稳定性高,物种最为丰富,为本试验条件下间伐措施的最佳处理。
Species composition and diversity of undergrowth vegetation community under different thinning intensities(0,10%,20%,30%,40%,50%)were examined at the initial stage of thinning in 29-year-old Pinus massoniana plantation in the low mountain region of eastern Sichuan.The results show that all the thinning treatments could reduce the absolute dominance of Miscanthus sinensis and Dicranopteris dichotoma.The dominant species composition of shrubs in each treatment was different.There were more extensive species in the medium thinning intensity(20%,30%and 40%)treatments than other treatments.The diversity indices increased first and then decreased with increasing thinning intensity.The variation degree of herbs was stronger than shrubs.The diversity indices of herbs were positively correlated with soil water content.The explanation amount of thinning intensity and soil physicochemical properties to community differentiation was 81%.The vegetation communities in the medium thinning intensity forests showed positive correlation with all the factors except total phosphorus.At the initial stage of thinning,herbaceous communities were more sensitive to disturbance than shrub communities.The 40%thinning intensity treatment was more closely related to soil environmental factors,with high stability and the most abundant species,which would be the best thinning measure under the experimental condition.
作者
刘思泽
尹海锋
沈逸
康文斯
罗艳
范川
李贤伟
LIU Si-ze;YIN Hai-feng;SHEN Yi;KANG Wen-si;LUO Yan;FAN Chuan;LI Xian-wei(College of Fore-stry/Key Laboratory of State Forestry Administration for Forest Resources Conservation and Ecological Security in Upper Reaches of Yangtze River,Sichuan Agricultural University,Chengdu 611130,China;Sichuan Province Key Laboratory of Forestry Ecological Engineering in Upper Reaches of Yangtze River,Chengdu 611130,China)
出处
《应用生态学报》
CAS
CSCD
北大核心
2020年第9期2866-2874,共9页
Chinese Journal of Applied Ecology
基金
国家重点研发计划项目(2017YFD0600302-05)
德国政府贷款四川林业可持续经营项目(G1403083)
四川省“天府万人计划”项目(1922999002)资助。
关键词
马尾松
间伐初期
多样性
Pinus massoniana
initial stage of thinning
diversity
作者简介
通讯作者:李贤伟.E-mail:lxw@sicau.edu.cn;刘思泽,男,1990年生,博士研究生。主要从事森林培育研究。E-mail:liu_size@qq.com。
