摘要
以长白山区"栽针保阔"红松林为研究对象,采用样带网格的调查方法,研究了不同抚育方式对阔叶红松林群落、乔木层、灌木层和草本层的物种丰富度、多样性指数和均匀度的影响机制及其影响效果,以便为阔叶红松林的恢复提供依据。结果表明:上层透光抚育保持林分郁闭度为0.2～0.6时,有利于群落植物多样性的维持,尤其是保留中等林分郁闭度(0.4左右)时,各立地上群落的植物多样性均相对较高(变化幅度为-1.83%～50.35%),而采取上层林木皆伐方式则不利于群落植物多样性的维持(变化幅度为-42.12%～20.51%);上层透光抚育对群落植物多样性的影响效果与各林分所处的立地条件存在着密切的相关性,与对照林分相比较,阳坡林分的植物多样性有较大幅度的提高(30.77%～50.35%),半阳坡林分略有下降(1.83%～10.62%),而阴坡林分略有增减(3.85%～23.56%或-7.69%),因此,其影响效果受立地条件所制约。
An experiment was conducted to study the effects of different tending intensities on species richness, species diversity index and evenness index of arbor layer, shrub layer and herb layer in Korean pine forest community by the way of planting conifers and protecting broadleaves in Changbai Mountain by setting up sample transects, in order to provide theoretical ba- sis for restoration of broad-leaved Korean pine forest. Results showed that canopy density within the range of 0.2 - 0.6 was beneficial to the maintenance of plant diversity, especially the moderate canopy density （ about 0.4 ）. The plant diversity for each stand site was all higher under the canopy density ranging from 0.2 to 0.6 （ - 1.83%-50.35% ）, while clear cutting went against the maintenance of plant variety （ - 42.12%-20.51% ）. The effect of tending in upper layer on species diversity indexes of the communities had a close relationship with site conditions. Compared with the control, Shannon-Weiner indexes of the communities on sunny slope increased from 30.77% to 50.35% and decreased from 1.83% to 10.62% on half-sunny slope, while it varied from - 7.69% to 23.56% on shady slope. Therefore the effect of tending is restricted by site conditions.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2008年第11期32-35,共4页
Journal of Northeast Forestry University
关键词
阔叶红松林
植物多样性
上层抚育效果
Broad-leaved Korean pine forests
Plant diversity
Tending in upper layer
