桉树人工林林隙特征研究  

Gap Characteristics in Eucalyptus Plantation Forests

作　　者：庞圣江[1] 张培[1] 贾宏炎[1,2] 杨保国 刘士玲[1] 朱茂峰[1] PANG Shengjiang;ZHANG Pei;JIA Hongyan;YANG Baoguo;LIU Shiling;ZHU Maofeng(Experimental Center of Tropical Forestry,Chinese Academy of Forestry,Pingxiang 532600,Guangxi,China;Guangxi Youyiguan Forest Ecosystem Research Station,Pingxiang 532600,Guangxi,China)

机构地区：[1]中国林业科学研究院热带林业实验中心,广西凭祥532600 [2]广西友谊关森林生态系统国家定位观测研究站,广西凭祥532600

出　　处：《桉树科技》2019年第4期27-30,共4页Eucalypt Science & Technology

基　　金：桉树用材林质量精准提升关键技术研究与集成示范(桂科AA17204087-6)

摘　　要：对桉树人工林林隙的一般特征和干扰状况进行初步研究。结果表明,桉树人工林形成林隙的最主要方式是干中和干基折断,其次拔根倒、枯立木和人工砍伐也是重要形成方式;但大多数林隙的形成均由树木多种死亡方式混合而成,单一原因死亡方式相对较少。冠林隙中以≤10m^2和10~20m^2的数量居多,扩展林隙≤50m^2为最多。桉树人工林林隙的形成时间相对较短,以2~4 a居多,但不同年龄结构的林隙数量差异不大;林隙的形成木腐烂等级为B级的分布为主。A survey was conducted to study the gap characteristics and disturbance regimes in Eucalyptus plantations in Pingxiang City of Guangxi Province.Results showed that the most important manner of gap formation is tree breakage at the base of their trunks or at their middle sections,and the second most important manner is root-pulling induced lodging.Other important means included standing dead tree and artificial felling.Most gaps are formed by a combination of these factors,and there were relatively few instances found of gaps arising from a single-cause.Canopy gaps of≤10m^2 and 10~20m^2 in area were the most frequently occurring gaps,with the largest gaps by area mostly being≤50m^2.In age structure,most gaps were formed 2 to 4 years ago,and the differences in number of canopy gaps were not significant.The decaying level of gap-makers mostly belonged to B class.The results reported would provide some scientific references for the sustainable management and optimum management in Eucalyptus plantation.

关 键 词：桉树 人工林 林隙 林隙特征 

分 类 号：S718.5[农业科学—林学]