“栽针保阔”红松林不同透光强度效果分析  

Effect of Different Crown Thinning Intensities on Korean Pine Forests Formed by Planting Conifers and Protecting Broad-leaved Species

作　　者：徐蕊[1] 牟长城[2] 李婉姝[2] 吴云霞[2] 

机构地区：[1]黑龙江省林业科学院,哈尔滨150081 [2]东北林业大学

出　　处：《东北林业大学学报》2010年第10期30-33,共4页Journal of Northeast Forestry University

基　　金：黑龙江省科技攻关项目(GA07B301-02)资助

摘　　要：以长白山、张广才岭、小兴安岭林区近30a不同透光抚育强度"栽针保阔"红松林为研究对象,利用重要值、多样性指数等指标定量分析不同透光强度(郁闭度0.2、0.4、0.6)对东北林区"栽针保阔"红松林的影响效果。结果表明:不同透光强度下群落的树种组成结构、径级分布、蓄积生产力、年均生长量、物种多样性方面都发生了显著变化。随着透光强度的增大,树种组成结构发生改变,红松在群落中的地位不断上升,先锋树种的地位不断降低;群落小径材比例依次下降,中径材比例依次提高,并出现一定比例大径材;下层红松阔叶混交林蓄积生产力逐渐增加;群落建群种红松直径和树高年均生长量呈递增趋势;中等透光抚育强度群落物种多样性最高。采取"栽针保阔"与不同透光抚育强度相结合方式恢复的次生林,均形成了红松占优势的针阔混交林,证实透光抚育是加速东北林区"栽针保阔"红松林恢复的有效途径,综合考虑采取中度以上透光抚育强度(郁闭度0.4以下)更有利于地带性顶级群落阔叶红松林的恢复。A survey was conducted to study the effects of different crown thinning intensities on Korean pine forests in terms of important value,diversity index and other indexes using nearly 30-year-old Korean pine forests formed by planting conifer and protecting broad-leaved species in Mt.Changbai,Mt.Zhangguangcailing,Mt.Xiaoxing＇anling as study objects.Results showed that tree species composition,diameter class distribution,volume productivity,annual growth,species diversity of the Korean pine community changed obviously.With the crown thinning intensity increasing,the dominance of Korean pine increased gradually while the dominance of broadleaved trees decreased gradually;the proportion of trees in small diameter classes decreased,the proportion of trees in medium diameter class increased,and trees in large diameter classes occupied a certain proportion;volume productivity of understory tree species increased gradually;the annual growth of diameter and height of Korean pine showed an increasing trend,species diversity reached the highest value in the community after moderate crown thinning intensity.The Korean pine secondary forests,formed by planting conifer and protecting broad-leaved species and thinning with different intensities（canopy density 0.6,0.4,0.2）,all changed into coniferous and broad-leaved mixed forests in which Korean pines were dominant.It is proved that crown thinning is an effective approach to accelerate the restoration of Korean pine forest formed by planting conifer and protecting broad-leaved species in the forest regions in northeast China.Moderate crown thinning intensity（canopy density above 0.4）is more helpful for restoration of broad-leaved Korean pine forests.

关 键 词：“栽针保阔”红松林 透光强度 效果分析 

分 类 号：S718.542[农业科学—林学]