【摘要】 本文利用主成分分析法对东北东部山区内41个气象站的气候因子进行了分析。利用聚类分析和多因子立地分类法对天然水曲柳进行了立地区划。同时,对每个立地单元内水曲柳的分布、生产力及天然更新状况进行了评价。结果表明:对水曲柳分布与生长影响较大的气候因子是≥10℃积温、年降水量和1月均温;水曲柳分布区被区划成2个立地地区和6个立地区,其中长白山北部山地区是水曲柳的中心产区,而小兴安岭山地区和千山低山丘陵区是水曲柳的边缘分布区。更多还原

【Abstract】 The climatic data from 41 weather stations in the mountain areas in the eastern part of Northeast China were analyzed by using Principal Component Analysis and the site classification for natural manchurian ash (Fraxinus mandshurica) was made by using Cluster Analysis and the ecological multifactor site classification approach. Meanwhile, the state of productivity distribution and the natural regeneration of manchurian ash in each site unit was evaluated. The results show that the main ecological climatic factors for the growth and distribution of manchurian ash are≥10℃ accumulated tempera-ture, annual precipitation and mean temperature of January, and that the distribution area of manchurian ash was classified into two site regions and six site districts, in which, the mountain district of the northern part of the Changbai Mountains is the central distribution for manchurian ash. The mountain district of Xiaoxing’anling,the low mountain and hills of Qian Mountain are the border distribution region.更多还原