采伐强度对小兴安岭低质林生物多样性的影响  

Effects of Different Cutting Intensities on Biodiversity of Low-quality Forest Stands in Xiaoxing'an Mountains

作　　者：宋启亮[1] 董希斌[1] 

机构地区：[1]东北林业大学,哈尔滨150040

出　　处：《东北林业大学学报》2014年第10期1-6,共6页Journal of Northeast Forestry University

基　　金：林业公益性行业科研专项(201004043)

摘　　要：以小兴安岭带岭林业局林区的低质林为研究对象,选取3块样地进行不同强度采伐后,分别进行天然更新、人工促进更新、人工补植更新,应用主成分分析方法,研究了不同采伐强度对低质林群落物种多样性的影响效果。结果表明：无论是在天然更新、人工促进更新,还是在人工补植更新试验样地上,在采伐强度20%~80%内,乔木层的生物多样性高于对照林分,尤其是选用40%~60%的采伐强度进行抚育采伐,乔木层的生物多样性相对较高,而在各试验样地上,高采伐强度有利于灌木层生物多样性的维持,在人工促进更新样地上,草本层生物多样性低于对照林分,采伐强度80%时,在各试验样地草本层生物多样性较高。所以采用中等采伐强度（40%~60%）进行低质林抚育改造,有利于群落生物多样性的提高。In low-quality forest stands of Xiaoxing＇an Mountain forest areas in Forestry Bureau of Dailing City,we selected three plots to proceed natural regeneration,artificial promoting regeneration,and artificial replanting regeneration after cutting with different cutting intensities,and studied the effects of the biodiversity of plant communities with different cutting intensities cut by principal component analysis. The biodiversity of arbor layers in whether natural regeneration,artificial promoting regeneration and artificial replanting regeneration plots was higher than that in the check plots with the cutting intensity of 20%-80%,relatively higher with cutting intensity of 40%-60% to cut especially,while it was available to maintain the biodiversity of shrub layers with high cutting intensity in the plots. The biodiversity of herb layers of artificial promoting regeneration plots was lower than that of check plots,and the biodiversity of herb layers of all the plots were relatively higher with 80% of cutting intensity. Therefore,it＇s available to increase the biodiversity of plant communities with medium cutting intensity of 40%-60% in the low-quality forest stands＇ tending transformation.

关 键 词：采伐强度 小兴安岭 低质林 生物多样性 

分 类 号：S753[农业科学—森林经理学]