抚育间伐对天然针阔混交林林下植被生物量及碳密度的影响  

Effects of Tending and Thinning on Undergrowth Vegetation Biomass and Carbon Density in Natural Coniferous and Broad-leaved Mixed Forest

作　　者：宋鑫彧 董希斌 Song Xinyu;Dong Xibin(Key Laboratory of Forests Sustainable Management and Environmental Microorganism Engineering of Heilongjiang Province,Northeast Forestry University,Harbin 150040,P.R.China)

机构地区：[1]森林持续经营与环境微生物工程黑龙江省重点实验室(东北林业大学),哈尔滨150040

出　　处：《东北林业大学学报》2020年第6期32-35,41,共5页Journal of Northeast Forestry University

基　　金：黑龙江省应用技术研究与开发计划项目(GA19C006)。

摘　　要：在小兴安岭东方红林场,设置6种抚育间伐强度(10%,15%,20%,25%,30%,35%)和对照试验样地,对不同强度间伐8 a后天然针阔混交林林下灌草层、枯落物层的生物量和碳密度进行研究。结果表明:小兴安岭天然针阔混交林林下灌草的生物量在间伐强度30%时最大,是对照样地的5倍,在间伐强度10%时灌草生物量最小,相比对照样地增加了22%,中度间伐时(15%、20%、25%)灌草的生物量几乎一致,与对照样地相比增加了一倍。间伐强度10%时枯落物层的生物量最高,相比对照增加了75%,间伐强度20%时枯落物层的生物量最小,相比对照样地减少了14.6%,间伐强度15%和30%枯落物层的生物量和对照样地近似相同;灌木层和草本层的碳密度随着间伐强度的增加而增大,当间伐强度大于30%时,林下灌木和草本植物碳密度的增加趋势下降。枯落物层的碳密度不受间伐强度的影响,不同间伐强度之间存在显著差异。抚育间伐在一定程度上提高小兴安岭天然针阔混交林林下植被的生物量和碳储量,间伐强度30%时有利于提高林下植被的碳密度。In the Dongfanghong Forest Farm of Xiaoxing’an Mountains,six kinds of tending and thinning intensity(10%,15%,20%,25%,30%,and 35%)and control test plots were set up under natural needle-broad mixed forest under different intensity thinning for eight years.Biomass and carbon density of shrub layer and litter layer were studied.The biomass of shrubs under the natural coniferous and broad-leaved mixed forest in Xiaoxing’an Mountains was the largest at 30% thinning intensity,which was 5 times as many as that of the control plot,and the biomass was the smallest at 10%thinning intensity,which was increased compared to the control plot.At 22%,the biomass of shrubs was almost the same during moderate thinning(15%,20%,and 25%),which doubled compared with the control plot.The biomass of the litter layer was the highest when the thinning intensity was 10%,which was increased by 75% compared to the control,and the biomass of the litter layer was the smallest when the thinning intensity was 20%.Compared with the control plot,the biomass was reduced by 14.6%,and the thinning intensity was 15%.The biomass and control plots are similar to the 30% litter layer,the carbon density of the shrub layer and the herb layer increases with the increase of thinning intensity.When the thinning intensity is greater than 30%,for the carbon of the shrub and herbaceous plants the increasing trend of density are decreased.The carbon density of the litter layer is not affected by the thinning intensity,and there are significant differences between different thinning intensities.Tending thinning will increase the biomass and carbon storage of undergrowth vegetation in the natural coniferous and broad-leaved mixed forest in the Xiaoxing’an Mountains to a certain extent.When the thinning intensity is 30%,it will help increase the carbon density of the undergrowth vegetation.

关 键 词：小兴安岭 天然针阔混交林 抚育间伐 林下植被 生物量 碳密度 

分 类 号：S753.7[农业科学—森林经理学] S718.5[农业科学—林学]