辽西油松人工纯林不同间伐抚育方式对比研究  

Comparative Study on Different Thinning Methods of Pinus tabulaeformis Plantation in Western Liaoning

作　　者：潘兴 PAN Xing(Beipiao Service Center of Forestry and Grassland Affairs,Liaoning Chaoyang 122000)

机构地区：[1]北票市林业和草原事物服务中心,辽宁朝阳122000

出　　处：《林业科技》2024年第1期24-28,66,共6页Forestry Science & Technology

摘　　要：以位于辽西地区的北票市47 a油松人工纯林为研究对象,对近自然经营及传统经营(株数间伐强度10%左右)间伐5 a后的林分的胸径、树高、冠幅增长量及分级株数比例分布情况进行了对比研究,结果表明:同等株数间伐强度下,近自然经营中以目标树为导向的采伐Ⅱ、Ⅲ级木的间伐方式对保留木胸径、树高生长的整体促进效果要明显优于国内传统的采伐Ⅳ、Ⅴ级木的间伐方式,且可以在一定程度上保持林分胸径结构分布的相对稳定性,间伐后保留木按胸径分级株数比例分布曲线整体偏向右移。传统经营及近自然经营间伐抚育方式对间伐后保留木的树高生长均有不同程度的促进作用,后者的整体促进效果要稍优于前者。然而,以上两种间伐方式对间伐后保留木的冠幅生长并未表现出明显的促进效果。近自然经营间伐抚育要想收到明显的抚育效果,建议株数间伐强度应至少在20%以上。The increment of DBH,height and crown width of?Pinus tabulaeformis?plantation,which was 47 years and located in Beipiao City,Western Liaoning and was thinned 5 years ago by close-to-nature thinning method and traditional thinning method separately with thinning intensity of 10%in tree number,and its proportion distribution of tree number in DBH,height and crown width according to different grades,were studied comparatively in this paper.The results showed that:compared to the traditional thinning method of cutting 4 to 5 grade trees,the close-to-nature thinning method,which was target-tree oriented and to cut 2 to 3 grade trees,had overall promoted the DBH and height growth of the retained?Pinus tabulaeformis?trees and successfully kept the stability of the forest DBH distribution.After thinning,the proportion distribution curve of tree number according to different DBH grades of the retained trees shifted to the right as a whole.The accelerating effect of traditional thinning and close-to-nature thinning on the height growth of the retained trees differed in various degrees,and the latter was better than the former.However,the two thinning methods mentioned hadn’t promoted the crown width growth of the retained trees significantly.It was advised that the thinning intensity in tree number should be above 20%to show the advantage of the close-to-nature thinning method.

关 键 词：油松人工纯林 间伐抚育 近自然经营 

分 类 号：S756[农业科学—森林经理学]