1·Pinus koraiensis, Larix gmelini and Larix olgensis are the species of the most important timber in northeast of China.
本文研究了东北红松、落叶松和黄花落叶松的木材密度和顺纹抗压强度的变异。
2·The peat moss will be changed into valuable things and it promotes automatically the renewal of Larix olgensis forest for peat moss is cleared away.
以及开发泥炭藓的多种应用，既可收到变废为宝，又因清除了藓类等地被物而促进长白落叶松林的更新。
3·On the basis of experiments of the cuttage propagation and cuttings transplanting of Larix olgensis, a lot of factors which affect the cuttings have been systematically studied.
本文以长白落叶松扦插及扦插苗移栽试验为基础，对大量的影响因素进行了系统研究。
4·Planting density has significant effects on fiber morphology, physical and chemical properties of Lalix olgensis wood. Except growth-ring width, remarkable differences was found in other indexes.
初植密度对落叶松人工林的纤维形态特征、物理特征及化学特征有重要的影响，除生长轮宽度外，其它各指标差异显著；