大青杨（Populus ussuriensis Kom.）乔木，高达30米。胸径达1-2米。树冠圆形，树皮幼时灰绿色，较光滑，老时暗灰色，纵沟裂，嫩枝灰绿色，稀红褐色，有短柔毛，横切面近方形，芽暗色，有粘质，圆锥形，长渐尖。过去许多人将东北东部山地的大青杨误指为辽杨P. maximowiczii Henry，但两者区分明显，大青杨小枝、叶两面、叶柄、花序轴均被密毛，大青杨的落叶叶面变黑，而辽杨和香杨落叶的叶面为赤褐色，易与辽杨和香杨区别。
大叶青杨 Leucoides
The drying characteristics of small-diameter lumbers of Larch (Larix) and Cathay poplar (Populus cathayana Rehd), located in the Northeast of China, were investigated.
本文以东北地区常见的落叶松和大青杨小径木为研究对象,较为全面系统地研究了小径木落叶松和大青杨锯材的干燥特性。
参考来源 - 小径木落叶松和大青杨锯材干燥特性的研究·2,447,543篇论文数据，部分数据来源于NoteExpress
采用高温水蒸气处理和加热处理固定大青杨木材压缩变形，并对两种处理结果进行比较。
The wood of poplar is compressed, then the compression deformation is fixed by high temperature steam and heating.
水蒸气后处理法中大青杨压缩变形恢复率最低，为- 3%左右；落叶松压缩变形恢复率最高，为11.6%左右。
During the water steam treatment after compression, the recovery rate of Ussuri Poplar is -3%, the lowest one, while that of Larch is 11.6%, the highest one.
年轮生长的功率谱测定检出，大青杨年轮生长存在2.5、3.2、6.3年的周期，年轮生长的周期性主要是受气象因子影响所致。
The measurement of power spectra of growth ring demonstrates the variations of period every 2.5, 3.2, 6.3 year under the influence of climatic factor.
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