摘要
研究不同树种及不同龄组下抚育间伐强度对林分生长、结构以及生物多样性的影响,为东北地区主要针叶人工林森林质量提高以及可持续发展提供依据。以黑龙江省牡丹江市林口林业局曙光林场以及红石林场下的红松中幼龄林、落叶松中幼龄林以及云杉幼龄林为研究对象,于2016年设置27块试验样地,采用低(10%~20%)、中(20%~40%)、高(大于40%)3种不同强度对其进行间伐实验并测定基本因子,于2018年对其进行复测。结果表明:不同树种在中高强度的间伐下,生长速度更佳。云杉幼龄林抚育后期胸径较对照样地生长增幅最大,达到124.18%,红松幼龄林抚育后期胸径较对照样地胸径生长增幅最小,为49.75%。树高生长增幅最大的为红松中龄林,最小的为落叶松幼龄林。不同树种,不同龄组间断面积、材积、生物量以及碳储量整体而言增幅趋势较为一致。间伐前后Weibull函数的3个主要参数a、b以及c在间伐后期均呈现不同程度的增加。不同林分、不同龄组之间间伐后,灌木以及草本的Shannon-Wiener指数以及Simpson指数均呈现一定程度的增加,且基本上随着间伐强度的增加,多样性指数逐渐增大,整体而言,间伐后对于草本的生物多样性影响程度大于对灌木生物多样性的影响。
We studied the effects of tending intensity on the growth,structure and biodiversity of different tree species and different age groups for improving forest quality and sustainable development of the main coniferous plantations in Northeast China.We established 27 experience plots which in the Shuguang and Hongshi Forest Farm of Linkou Forestry Bureau,Mudanjiang City in Heilongjiang Province in 2016.The plots contain of young and middle-aged forests of Pinus koraiensis,young and middle-aged forests of the Larix gmelini,and the young Picea asperata forests,by using low(10%-20%),medium(20%-40%),and high(greater than 40%)intensities for thinning experiments.The basic factors were determined and repeatedly measured in 2018.Different tree species had better growth rate under medium and high intensity thinning.Compared with the control plot,the growth of the DBH of the young forest of Picea asperata was the highest,reaching 124.18%.The growth of the DBH of the young Pinus koraiensis forest was the smallest when compared with the control plot,which was 49.75%.The highest growth rate of tree height is the middle-aged forest of Pinus koraiensis,and the worst is the young forest of L.gmelini.The growth trend of basal area,volume,biomass and carbon storage in different age groups and species is more consistent.The three main parameters a,b and c of the Weibull function before and after thinning showed different degrees of increase in the late stage of thinning.After thinning between different stands and different age groups,the Shannon-Wiener index and Simpson index of shrubs and herbs showed a certain increase,and the diversity index gradually increased with the increase of thinning intensity.The effect of thinning on herbs biodiversity is greater than that on shrub biodiversity.
作者
郭海沣
王涛
贾炜玮
Guo Haifeng;Wang Tao;Jia Weiwei(Northeast Forest University,Harbin 150040,P.R.China)
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2019年第12期1-6,共6页
Journal of Northeast Forestry University
基金
国家自然科学基金(31870622)
黑龙江省林口林业局可持续经营试点项目
关键词
间伐强度
林分生长
直径分布
生物多样性
Thinning intensity
Stand growth
Diameter distribution
Biodiversity
